mbd2884
Headphoneus Supremus
- Joined
- Mar 25, 2005
- Posts
- 2,483
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[size=large]My Impressions of one of the 18 Compass Test models[/size]
Compass Pictures courtesy of Peete and mbd2884
[size=medium]Equipment Featured:[/size]
Laptop (W/ Monkey Media Otachan's ASIO .67 (dll)). Audio Technica AD900. Audio-gd Compass (Earth/Moon HDAM, 13 dB setting and neutral setting). Audio-gd Power Cable. Furutech FP-704 Plug
[size=medium]Purchasing Tips[/size]
When you purchase the Compass do the following. Contact Kingwa by email and notify him of your payment. He will verify it. Then email him the exact location where you want the product shipped, no confusion. Important let him know where you are located and specify 120V or 220V, and which HDAM you want, Earth, Moon and Sun.
[size=medium]What is the Compass?[/size]
The Compass is an excellent DAC, using the PCM2707 for USB input and the AD1852 as the D/A. Further detail below.
Compass is a discrete, class A, desktop Amplifier with a neutral signature.
Compass is a combination, DAC/Amp with a dedicated power source all in one case, each on it's own module, a modular design, unique like no other in it's price range.
Compass is a Pre-Amp, a switch option in the backpanel.
Compass is just an Amp. A bypass disconnects the Amp from the DAC completely.
Compass is 100% fully discrete output, only IC in the input for the PCM2707, and AD1852, with the DIR9001 to reduce jitter. More info below.
For more specific technical and comparisons to other products, please read Peete's Review:
http://www.head-fi.org/forums/5420063-post2019.html.
For greater detail in comparison of the Compass DAC and Amp for clarity, detail, control and so forth read Currawong's and Drosera's reviews, which are linked in the OP.
[size=medium]Quality of Build[/size]
Chassis is all aluminum. Even the dials are all aluminium. The aluminum is 8mm thickness and very sturdy, heavy and solid. Has a nice tactile feel to it.
Headphone Jack is a neutrik locking 1/4" jack. It's fantastic, if never seen or used one, you'll be impressed.
Volume Pot is the Alps RK27 Blue Velvet
The Digital Audio Interface used is the DIR9001, which has the lowest jitter available within this Price Bracket.
The Digital Analog Converter is the AD1852. This is an oversampling semiconductor capable of 24 bit / 192 processing. The Compass limits it to 24 bit / 96 for Coaxial and Optical input. 16 bit / 44.1/48 for USB input.
Attention! The Compass cannot upsample. Nothing is upsampled, means that if the input is 16 bit 44.1 khz (CD and MP3s), the output is 16 bit 44.1 khz. Even though the AD1852 is oversampling, the sample rate is dependent on the input. Your music is not distorted or changed. There are a few posts in this thread from idiots who attempted to spread false information, I apologize for the confusion they have caused. This was all verified by Kingwa himself, the winner of the 2007 National Semiconductor contest, who knows more about his own product? I like to think Kingwa.
The USB Input is the Burr Brown PCM2707, the current standard in the audio industry. It is then converted to spdif by I2S to the AD1852. Even the highest grade DAC that use PCM1704UK, use the PCM2707 with an I2S converstion. I2S is used to keep jitter as low as possible. Pretty much all you need to know, using the USB input, the processing still occurs at AD1852, the conversion ensures low jitter and best audio results for you.
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Caps: Evox Caps are used. Easiest ones identified are the Cap Mods applied to the HDAM. They are the white caps on the side, near the connection. Evox Rifa is a US company with 60 years experience, recently acquired by the Kemet Group, still located in USA, with headquarters around the world.
Electrolytic Capacitors: Are made by NOVER, they manufacture audio grade electrolytic capacitors. The huge black RX11 and the smaller black and gold capacitors. If you search NOVER you will run into Anglia, Anglia is their distributor.
Resistors: Made by Dale
Transistors: Toshiba and Hitach audio products
The PCB boards are 2MM copper, gold plated.
Soldering: Audio-gd Products are soldered by Hi-Fi enthusiasts only, no sweathshops here. The soldering work is top quality verified by other Compass users also.
Quality Control: All Audio-gd products undergo 100 hours of burn in and testing before shipment.
[size=medium]The Compass AMP[/size]
Compass has a full sized desktop Amp. Just cause it has both DAC/Amp, doesn't mean anything was compromised. I posted a picture of the Gilmore Lite which is one of the more recommended discrete SS Amp here on Head-Fi for Mid-Fi users.
[size=medium][size=x-small]I also posted a picture of the KECES 171. This is to show what the KECES Amp is. KECES Claims their 152 is the 151 with something like the 171, but you can't tell since it's all on one board. Here with 151 and 171 can see for comparison to the Compass. Hope this helps for those who want to compare the Compass to the 152 from a design and technical aspect. Not a quality vs SQ comparison for those who I may have angered. FYI the 171 Amp is claimed to be improved over the 152 Amp, so it's not the exact same, but it gives you an idea, right?[/size][/size]
Compass is a Class A device just as all of Audio-gd's products. The final version for the rest of you will be 9 db /15 db. I think it has been suggested the HD650 should still be fine with 9 db option. For the Newbs like myself, who may wonder what is Class A?
Wikipedia quick description
Quote:
Also some blah blah over in-efficient, but we are talking about headphone amps, not power/integrated amps.
[size=medium][size=x-small][size=medium]
Discrete vs OpAmp or IC Design:[/size]
http://www.head-fi.org/forums/f5/dis...opamps-157504/
The main reason why the Compass DAC and Amp looks drastically different from the KECES 151, KECES 171, KECES 152 is because the KECES products are all IC, Integrated Circuit Design.
[/size][/size] Quote:
IC Amps use what are called OpAmps, operational amplifiers.
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Integrated OpAmps are designed to simplify the complexities of a discrete design. Discrete means that it uses discrete components, individual transistors, caps and so on. The mode of operation at each stage are determined by the user/designer/engineer. Whereas integrated OpAmps are multi purpose devices. That is probably the biggest difference. Integrated OpAmps are also Class B, meaning they are either on or off until an actual signal passes through. A discrete Amp can be True Class A, always on, full throttle, not dependent on music signal, passes on the signal amplified, input and output are fully balanced.
Integrated OpAmps can be biased into a Class A design, but it's not a true Class A. If it was, the integrated OpAmp would be destroyed, burned out.
Audio-gd Compass does use one HDAM, easiest definition, OpAmp on steroids. But the Audio-gd is fully discrete, which is why it's still a true Class A device. Audio-gd were the first to make a discrete HDAM, and continue to be only company to possess the original PCB designs. HDAM, an integrated version was first invented by Marantz who still have proprietary rights to them.
[size=medium][size=x-small]
[/size][/size]So while a cheaper and simpler way to create your DAC, and Amp would be to use OpAmps, this doesn't mean IC design is inherently bad. Just as there are bad discrete amps, there are good IC designs. But in general, Head-Fi and Audiophiles prefer discrete amps. I personally have more respect for engineers/designers who can create quality discrete devices.
[size=medium]HDAM in the DAC? Why?[/size]
So my question I had, the Amp is fully discrete, and the DAC is fully discrete. Regardless of whether the HDAM from Audio-gd are fully discrete or not, I was wondering why even use it. Then I got more confused as it seems with Solid State amps, one can have by rolling like Tubes, but roll OpAmps. So seeing the OpAmp placed in the DAC in the Compass confused me to no end. I asked earlier in this thread think it got looked over, so I been confused for weeks now.
For those who had the same confusion as me above, I believe this is the answer. Audio-gd uses their HDAMs to act as a buffer between the DAC and Amp, which will prevent negative feedback, reduce distortions, prevent overloading distortion and electromagnetic interferences. Maybe I'm wrong, but seems it conditions the signal from the DAC to the Amp so for example, there is black silence when no music plays, and that you don't hear any distortions when the volume is increased up and down through the Amp.
Quote from Wikipedia
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[size=medium]Earth vs Moon HDAM[/size]
Earth HDAM is rated Neutral. The Moon HDAM rated warm, mellow. The Sun v2. HDAM rated Bright, Forward.
I only have used and heard the Earth and Moon. Earth is definitely more neutral. The details are more emphasized, the mids are clearer, the bass with more impact, and forward, but not as enveloping. Due to all this the Soundstage sounds smaller with the Earth. With the AD900 they work amazingly well. The AD900 is meant for clarity, detail and punch, Earth gives it to them.
Moon was warmer, more laid back. The Soundstage was expansive, but the mids were more recessed. The bass while there was more, was harder to distinguish. It had a darker sound. It definitely will have its aficianados, me using the AD900 and future HD600 prefer the Earth. I believe the Moon would souund good with the HD650.
[size=medium]Compass DAC[/size]
The Compass DAC is 100% fully output discrete DAC. The input, is integrated, using the AD1852 D/A and the DIR9001 DSP to reduce jitter.
For Compass DAC comparison to Meier Audio Opera please read Drosera's review:
http://www.head-fi.org/forums/5452809-post3201.html
For Compass DAC comparison to DAC1 read Currawong's review:
http://www.head-fi.org/forums/5423587-post2105.html
Currawong's initial DAC review:
http://www.head-fi.org/forums/5354481-post890.html
Again for further details comparison to other DAC and Amps read Peete's review:
http://www.head-fi.org/forums/5420063-post2019.html
[size=x-small]The Compass DAC in this review will have picture comparisons to the KECES 151 DAC, which I feel on Head-Fi is most recommended by those interested in the Compass.
I also added an internal PCB picture to the Zero.
[/size][size=medium][size=x-small][size=medium]Audio-gd Compass Power Source[/size]
Just compare to something like the KECES for power source. Then look at something like Gilmore Lite which uses a Elpac WallWart. Any questions about the power source should be answered now. Compass is well fitted for power. I mentioned Gilmore Lite because in all the threads I've read, no one has asked, is the Lite well powered. But in this thread, there have been a few who questioned the Compass power, implying it needed more...
Underneath is the 50w Toroidal power source. Taken from Peete. [/size][/size]Fully shielded 50 Watt Toroidal transformer 100-120V or 220-240V primary - customer specified at time of order. No universal V switch used because of Sound Quality degradation. Transformer is rated at 120V
or 240V instead of cheaper 110-115 or 220-230V competitors.
Power source is also Full Sized. Notice in separate power source, the rectifier is screwed to the floor of the casing with the toroidal behind. Do the same for the Compass power source, there you go. I don't see the difference. Any questions still whether the Compass is well powered? /Flex
[size=x-large]Picture Time!![/size]
I think having these pictures right in your face to compare, should dissipate any thoughts that the Compass is some hybrid DAC/Amp combo, where in fact that is not the case. It's equivalent of stuffing a full sized DAC and full sized Amp into one package.
Disclaimer: These pictures are to demonstrate that the Compass comprises of a complete, separate, desktop, 100% discrete class A Amp. Also a separate, desktop headphone DAC, 100% discrete output. Not SQ or sound comparisons or anything related to that.
[size=medium]Compass Rectifier[/size]
[size=medium][size=x-small]Rectifier is a Alternate Current converter to Direct Current. [/size][/size]
[size=medium]Gilmore Lite[/size]
[size=medium]Purity Audio KICAS: Also Class A Discrete Amp
Compass Amp[/size]
[size=medium]KECES 171 Headphone Amp/PreAmp[/size]
[size=medium]
KECES 151 USB DAC
Compass DAC
Compass vs 152, just the Amp/DAC
[size=small]KECES 152 (Left), Audio-gd Compass (Right)
[/size]
Zero DAC/Amp: For $125 impressive. The DAC appears to be at the top and the Amp at the bottom in the picture.
So how big is it?!?!?
Gilmore Lite
KECES 152 (USB DAC/Amp Combo) w/ HD600
Compass: Yes it's even bigger!
[size=x-large]ACCESSORIES: Audio-gd Power Cable, Furutech FP-704, and more glorious pictures[/size][/size]
It seems to me, there is a lot of new headphone fans looking at this now gigantic thread, looking for their first substantial upgrade for an audiophile grade DAC, first true 100% discrete Amp, with Neutral sound.
And when they read descriptions here, there must be others like myself, without any reference points to compare to in front of them. Everything on the Compass and its accessories are oversized in comparison to my previous gear. Here are some photos for the new people to get an understanding, when I say RIDICULOUS!
Left: Neutrik 1/8" Gold Plated Center: Audio Technica Stock with 1/4" adapter Right: Furutech FP-704
Neutrik Locking Jack with Neutrik 1/8" and Furutech FP-704
Stock Power Cables compared to Audio-gd After-Market Power Cables
The stock vs Audio-gd cables size comparison
How big is everything in comparison?
AD900s look great still huh? Three years of being dropped, sat on, flying across room when flipping bed covers while AD900s lay on top listening before sleepy time, and still like new. Take that Grado fans! That's called quality build to survive the inadvertent stupidities, guaranteed I'd wreck any Grado within a weeks time.
Yeah as Sandchack said, don't let the power cables size diminish the size of the Compass. Here is is compared to my 15.4" Asus Laptop. And if you ever see, Asus Laptops, they are also built like tanks, notice a trend here?
For a DAC/Amp to just drive your headphones, Compass is huge huh? And yes that wood is my crappy old coffee table I use when I listen to tunes on the couch. My room has shrunk considerably since I shoved a couch in it.
[size=medium]Power Cable[/size]
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Sound wise, I would agree with Peete and Sandchak's observations, can go back and read them. As I don't want to repeat what they said, for me the biggest noticable change is the treble. I have no idea how, can't explain why, but the treble is no longer harsh. Its not as piercing as it was this morning, I'm listening to George Winston's Forest Album and its a joy to listen right now. As they said, the sound tone has not changed. Its just certain things sound better than before. The separation on the bass in some songs better. But thing I can say for sure, definitively for my ears, the treble has improved enough for me to say, yes there is an audible difference.
Is this thing worth $75 and plus shipping? Hmm can't say. But you will notice a difference, at least I have. I'm glad I have it.
[size=medium]Re-Terminated the AD900[/size]
Furutech, what a pain in the ass. Sat there for 5 minutes just deciding how solder them on, no directions, nothing on their website, nothing on this forum either. They could have made it hell lot easier. And yes its truly massive. The black ring for for the jack on the Compass, yeah the Furutech plug is about the same size. I still think its ugly, not what I was expecting at all. Although its really solid, I feel if I took a hammer to it, it would survive unscathed, OK exaggerating, but sure feels like it could. But its still ugly.
Sound wise, I am pleased. Running my AD900s with a 1/4" plug instead of a 1/8" with an adapter, definite noticeable difference. Another layer of veil is removed. The bass has been tightened a little more, with more impact. The treble is clearer and the more distinct. Overall its just more fun, and happy I decided to replace the plug. If you have a 1/8" on yours, I recommend re-terminating it. But I would use the Neutrik 1/4" gold plated. Its cheaper than the Furutech, slimmer design and easier to solder. Furutech is one fat, massive ugly plug that sounds awesome. But with the Furutech, definitely not placebo. The plug used by Audio Technica has a plastic stem that the the wires are soldered onto. Just seems to be far inferior design to the Furutech and positive that affected the sound.
[size=large]Compass Impression with MUSIC!![/size]
[size=small]Heavy Rock[/size]
Godsmack - Bad Religion
Hell yeah, its almost an adrenaline rush and a motivator to do something extremely reckless. The crashing cymbals are excellent, and the voice is so raw and can definitely tell he is screaming into the mic. Soundstaging is excellent, can definitely tell the cymbals used to keep up the beat is on the right, the crashes center and to the right, slightly above. The guitars have a sweet edgy sound to them, even the high notes, they don't whine smoothly like Clapton's fender, but as a proper heavy rock guitar should. The bass drums have that nice slam sound to it, higher pitch sound as it hits the plastic like material, but still have that bass thump.
[size=small]Grunge[/size]
Writing Alice in Chains as I listen. When I think of 90s rock, Alice in Chains with the whole Seattle Grunge phenomenon, well they were the epitome in my mind. No other band had such a distinct sound, their frontman Layne Staley has in my personal opinion the best grunge band vocals, no other frontman has come close since his departure. And Jerry Cantrell is amazing, his play definitely rank as some of the best guitar solos. One of the few guitarist able to go solo after the ending of his band and be better than the current rock/grunge bands. And personally, I can't think of anyone else who can the play G&L RAMPAGE like Cantrell, its orgasmic. Cantrell used the G&L RAMPAGE with Layne Staley but later in his career became known for his mastery over the Gibson Les Paul, listen to some of his solo material. G&L for those don't know was started by the founder of Fender, Leo Fender after he sold Fender.
Before continuing, for those who don't know who Alice in Chains are, yeah reunited, but they died after Layne Staley passed away, his voice can't be replaced, sniffle. Favorite album, jeez that's tough to say, favorite for today is Dirt. So you say, you are so full of it about Jerry Cantrell, fast track to 1:55 on Dam that River. That 25 seconds of guitar solo, yeah, that's what the G&L RAMPAGE sounds like in Cantrell's hands. So smooth, yet so gritty with grunge, his fingers just so effortlessly across the frets, there is no grating sound as with many guitarists when they slide their hand along the neck of the guitar. Its just plain smooth. The Compass lets you hear the distinct whine of the G&L. But you can't discount the rest of the band, their drummer like a "good" drummer does, sets the framework for the music. And he does it well, noticeably skilled, but never the focal point of the music. During transitions, Compass lets you hear the change of pace on the Cymbals and Snare drum well. Everything with Alice in Chains is in your face, and Compass brings the music to your face, definitely not behind, or distant, Layne is crooning in your face. Want to hear how distinct Layne's voice can be, listen to Godsmack. Yeah yeah, bet you didn't see that coming. Yep, Alice in Chains - Dirt - Godsmack, that's how awesome this band is. But Cantrell definitely is center stage on this song, aside from the reverberations in Layne's voice, which he personally does, this is not post recording production work, errie.
Let's backtrack, opening song Them Bones, Layne just screams a few times, ahhh! Compass you can hear his voice reverberate, post recording, or more of a slight echo. Ever so slight to give it volume. This is a short 2:32 song that is just a blast from start to finish. Cantrell steps in at 1:15 and I mean steps in. Everything is just background noise at this point. Layne is a solid rhythm guitarist. He tangos with Cantrell for short bit, Compass reproduces Cantrell's whine with complete separation from Layne's short burst of quick notes, that have no sonic edge at all. When Mike Starr sings in perfect unison, backup, with Layne you can always hear the two voices distinctly, no mistaking the two voices, always two presences.
I'd say if Alice in Chains sounds this great on the Compass, this is an excellent DAC/Amp choice for anyone who loves heavy rock/grunge/metal. You won't be disappointed. The edgy guitar whine is concert quality, the bass drum slam, you can visualize the drum kick exactly when it hits the drum surface, and Layne's voice, his high pitched, in minor key voice, as many described as haunting, is heard but along with his low, gutteral voice, often at the same time. If you were in a dark surrounding, only able to see dark shadows faintly, and Layne's voice was in your ears, I think a puddle would form at your feet. The bass guitar I'd say is the most blase aspect of the band's sound. But if you want to just close your eyes, you will hear it, as you listen more, can hear it more distinctly. Compass never loses the bass, its always there, but not in your face, as it would be if it were a lower quality amp. Bass guitar has a lower sound, closer to the frequencies where its you gotta feel in the chest to hear, but no worries, as I said, Compass brings it to you with relative ease.
If you'd like to hear some more Alice in Chains Awesomeness, look no further than Facelift - Man in the Box. JeeEEeesSuUUuS ChriIIiISssT, Layne, that's what Layne's voice is all about. While the guitar play from both Cantrell and Layne is excellent through the song, it's at 3:15 when their play "dance" with each other. At 3:45 Cantrell does something I can't explain, but its one of the coolest sounds from a guitar. I won't eve try to describe it, but its really really cool, and have to say, I never noticed it until I listened on the Compass. Cantrell's guitar play as I said before, generally is very smooth. But on Sea of Sorrow, at 3:55 you can hear that he has mastered syncopation also, just because he doesn't do it often, don't let that fool you. Not as good as Vince Giraldi, but that's unfair as no other instrument comes close to the Piano in that aspect, as far as guitars go, Cantrell and Compass about as good as it gets in a fast paced rock ballad.
Its an excellent heavy rock/grunge/metal DAC/Amp. I'd imagine, this is what Solid State amp is all about when listening to fast, energetic, jump around crazy, rock, head banging with imaginary flowing long hair, entangled from the furious movements. When listening to rock on the Compass I wish I played the Guitar. But when I listen to George Winston, I remember again why I chose to play the piano instead.
What I love most about the Compass and Rock. Well Rock my opinion should be played LOUD, give the music some authority, let the singer come up front to your face. No matter how loud, how far I crank the Volume up, the music's detail, and quality never deteriorates. The bass never decays, never becomes muddy. The treble never becomes sparkly, or unbearable. The Mids never become overwhelmed by the increased volume of the bass, the music remains in balance. This is definitely the biggest difference in my music listening experience so far from other Amps, Soundcards I've listened to in the past, and why I am so addicted to the music right now.
[size=small]Solo Piano? Some George Winston and David Lanz.[/size]
George Winston - The Music of Vince Guaraldi - The Masked Marvel
One of my favorite solo Piano Jazz pieces, and no one has the style Winston brings to this piece. Every key stroke is heard, separation again excellent. It starts off with what you expect from this composition, then at 1:40 is when Winston says, hey, I'm better than you ever will be. You thought Guaraldi syncopation was hard to master, I pity you and laugh with impunity at your efforts. Anyone who has tried to play this work to perfection can verify, Guaraldi is one of the toughest to get right, yeah yeah lot of people can play his stuff, but almost everyone does it WRONG. I personally have never heard anyone while in High School, recitals play correctly. So fast, yet so effortless, can visualize those incredible fingers moving in hummingbird speed. So many notes within a second, and you hear every single one. Piano I still believe to be one of the toughest sounds to be reproduced by analog/audio devices, each note on a piano has so many different frequencies, and the Compass does it very well. Its not perfect, can tell you are not standing next to the grand piano, but this as close I've gotten. The imaging is right on, you can visualize as Winston moves his hands to the right and left with the speed of a confident, and rightfully arrogant master. Compass lets you hear the forceful play of Winston, he doesn't hold back, no tentative key strokes. While there is the slight carry over of sound from key to the next, the following keys are very clear. This is what Solo Piano is about.
George Winston - Plains - Teach Me Tonight.
Here Winston is accompanied by a percussion and stand up bass. Its very obvious with Compass that it is a stand up bass, even though its far recessed in the background, you can still hear the distinctions that differentiate a stand up to electric bass. Again, there is no mistaking at any point between the bass notes on the piano and the bass notes of the bass. There is no lag, so fast, even the AD900s seem to be at its limit to keep up with the Compass. The high notes, as Winston slams them in dramatic change of pace and volume, sounds excellent, ears do not hurt for any piercing treble as you might from an inferior source. This entire song is change of pace, change in volume, without any indication ahead of time, I love listening to this composition.
David Lanz - An Evening with David Lanz - Leaves on the Seine
This is a live recording as the title suggests. The recording is very poor in comparison to a studio recording. You do have to jack up the volume a bit to hear it at decent volume, but lucky for us, the Compass complete back silence adds no distortion at all. This piece is slow, good flow. Lanz has a far different style, I don't want to be sexist, but he plays like a girl. Its very flutter like across the keys, not nearly as definitive, or authoritative as Winston. Compass lets you hear immediately the differences, as any Piano player knows, the sound of each key is determined by the pianist. You can hear every rustle and cough of some lame audience member who can't cover his/her mouth right. Even hear a whisper in the background.
David Lanz - Skyline Firedance - Dark Horse.
This is a studio piece. Not unlike his live recording, his studio recordings are also sub-par. Its a real shame since he is a great pianist in his own right, and style. Here you can hear his music free from rustles of clothing, whispers and coughs. At one point you can hear the creek of the bench as he shifts weight. Lanz spends more time in higher octaves, the notes linger longer, and you can hear hover after being played. But that doesn't detract in the least bit from the continuing, quick, fast notes following. This piece is fast, and while Lanz definitely plays more forcefully, you can still visualize that his style of play is to me, womanly, flutter like. There are some points where you cannot mistake it is in fact a man playing though.
Overall conclusion:
The Compass reproduces the sounds and intricacies of the Piano better than anything else I've been able to sit down for a while and listen to. But its not perfect, but that largely has to do with the recordings. A recording just doesn't quite bring the feeling of the music as your hands press firmly against the ivory keys. I'd much rather listen to Winston than on my Uncle's Denon top of the line system with custom 10K speakers, though.
[size=small]Orchestra[/size]
How about some Orchestra music? I do not have a collection of Classical, when I listen to Classical it's when I do work, study and reading, it's background. And there is just too many Classical pieces for me at this point to collect, I listen with streaming 192 internet. And well, its not that great in quality, I won't even both reviewing.
What I do have is E.S Posthumus. This is incredible work.
E.S Posthumus - Cartographer (Piri Reis Remixes) - Nasivern Pi
This composition is without the main vocalist. The orchestra instead takes center stage. There is an Chorus in the background. The music has a complete percussions including tom toms, timpani, what sounds to me a series of bass drums, similar to japanese drums. The chorus always background, never in front. With a full orchestra, wonderful violins, you can always still hear every chord of an acoustic guitar accompaniment. There is a slow, pleasant solo done by a flute, which you can hear the breathy notes, the distinctive sound as the air passes through the flute from note to note to say, this is not electronic reproduction. This is as full, complicated and all encompassing sound as I can imagine and nothing is lost with the Compass. Nothing at all.
E.S Posthumus - Cartographer (Piri Reis Remixes) - Isunova
One of the most moving music I have heard. The Violins here take the place of the vocalist. Again Chorus in the Background. But its incredible, you have one set of Violins playing the Vocal's melody, the others backing it up and proividing support. If you love Violins, you will love this on the Compass. The Percussions is excellent also, every kind of percussion sound you can imagine just crashing in succession, in unison, in separate tempos, its eargasmic. Then the Violins sing, with as much passion as a Soprano, they are singing. There are accompanying electric bass, acoustic guitar and in this insanity of immense volume and diversity of sound, nothing is left behind with the Compass. Any questions of whether the Compass has speed, detail and clarity are answered with a resounding YES!
Conclusion:
For this kind of complexity, speed and congestion of sound, you gotta have a fast, Open Air headphone. For those who think DT770 are balanced and got good sound, I'm sorry, you will be doing a great diservice listening to E.S Posthumus with the detail that Compass is providing effortlessly. Even the D2000 when I listened before, the closed enclosure just wouldn't allow you to hear everything right, something was wrong. The Compass will provide a balanced sound, with nothing left behind, this means you gotta use Headphones that can keep up. I believe with the Compass, its the Headphone that will be the bottleneck. Meaning, I believe the potential for the Compass is beyond what AD900s also, if I were to use better headphones, Compass would give everything it could manage. If you don't have a neutral/balanced headphone with excellent Mids, then don't even bother to listen to classical and orchestral music with the Compass.
[size=small]For Trance, very short impression, listen for yourself![/size]
I am currently listening to Lostep's Burma. After Sasha featured Burma on his Involver album, Lostep was on every Progressive Trance lover's lips, quickly became fan favorites fast. This launched Lostep's reputation and popularity and they came out with their own album, and its fantastic. Burma is over 10 minutes of endless distinctive bass lines and beats. Like all good Trance, Burma has at least two beats constantly and one to two bass lines, you can hear all three/four with the Compass easily. Love this song. You want basshead sound, you will have to change settings, but from Neutral, the bass is dream like, just floats, but with the emphasis that always says, come back, I'm still here.
I'll just say, so far Lostep, BT, Sander Kleinenberg, James Holden, Sasha all sound incredible on the Compass. If you love Trance, you will love Compass. The full spectrum of detail and incredible range of sound frequency that no other genre of music can match other than Orchestra, Compass does it with ease.
[size=medium]Ranking the Sounds[/size]
Everything can't be perfect, so what genres of music do I like mos with the Compass?
1). Grunge/Heavy Metal
2). Trance/Atmospheric
3). Ochestra
4). Brit pop/Soft Rock
5). Solo Piano, (Piano is just a tough sound
)
Compass Pictures courtesy of Peete and mbd2884
[size=medium]Equipment Featured:[/size]
Laptop (W/ Monkey Media Otachan's ASIO .67 (dll)). Audio Technica AD900. Audio-gd Compass (Earth/Moon HDAM, 13 dB setting and neutral setting). Audio-gd Power Cable. Furutech FP-704 Plug
[size=medium]Purchasing Tips[/size]
When you purchase the Compass do the following. Contact Kingwa by email and notify him of your payment. He will verify it. Then email him the exact location where you want the product shipped, no confusion. Important let him know where you are located and specify 120V or 220V, and which HDAM you want, Earth, Moon and Sun.
[size=medium]What is the Compass?[/size]
The Compass is an excellent DAC, using the PCM2707 for USB input and the AD1852 as the D/A. Further detail below.
Compass is a discrete, class A, desktop Amplifier with a neutral signature.
Compass is a combination, DAC/Amp with a dedicated power source all in one case, each on it's own module, a modular design, unique like no other in it's price range.
Compass is a Pre-Amp, a switch option in the backpanel.
Compass is just an Amp. A bypass disconnects the Amp from the DAC completely.
Compass is 100% fully discrete output, only IC in the input for the PCM2707, and AD1852, with the DIR9001 to reduce jitter. More info below.
For more specific technical and comparisons to other products, please read Peete's Review:
http://www.head-fi.org/forums/5420063-post2019.html.
For greater detail in comparison of the Compass DAC and Amp for clarity, detail, control and so forth read Currawong's and Drosera's reviews, which are linked in the OP.
[size=medium]Quality of Build[/size]
Chassis is all aluminum. Even the dials are all aluminium. The aluminum is 8mm thickness and very sturdy, heavy and solid. Has a nice tactile feel to it.
Headphone Jack is a neutrik locking 1/4" jack. It's fantastic, if never seen or used one, you'll be impressed.
Volume Pot is the Alps RK27 Blue Velvet
The Digital Audio Interface used is the DIR9001, which has the lowest jitter available within this Price Bracket.
The Digital Analog Converter is the AD1852. This is an oversampling semiconductor capable of 24 bit / 192 processing. The Compass limits it to 24 bit / 96 for Coaxial and Optical input. 16 bit / 44.1/48 for USB input.
Attention! The Compass cannot upsample. Nothing is upsampled, means that if the input is 16 bit 44.1 khz (CD and MP3s), the output is 16 bit 44.1 khz. Even though the AD1852 is oversampling, the sample rate is dependent on the input. Your music is not distorted or changed. There are a few posts in this thread from idiots who attempted to spread false information, I apologize for the confusion they have caused. This was all verified by Kingwa himself, the winner of the 2007 National Semiconductor contest, who knows more about his own product? I like to think Kingwa.
The USB Input is the Burr Brown PCM2707, the current standard in the audio industry. It is then converted to spdif by I2S to the AD1852. Even the highest grade DAC that use PCM1704UK, use the PCM2707 with an I2S converstion. I2S is used to keep jitter as low as possible. Pretty much all you need to know, using the USB input, the processing still occurs at AD1852, the conversion ensures low jitter and best audio results for you.
Quote:
| USB -> PCM2707 -> I2S -> AD1852 -> Amp -> Headphones |
Quote:
| I2S, or Inter-IC Sound, or Integrated Interchip Sound, is an electrical serial bus interface standard used for connecting digital audio devices together. It is most commonly used to carry PCM information between the CD transport and the DAC in a CD player. The I2S bus separates clock and data signals, resulting in a very low jitter connection. Jitter can cause distortion in a digital-to-analog converter. |
Caps: Evox Caps are used. Easiest ones identified are the Cap Mods applied to the HDAM. They are the white caps on the side, near the connection. Evox Rifa is a US company with 60 years experience, recently acquired by the Kemet Group, still located in USA, with headquarters around the world.
Electrolytic Capacitors: Are made by NOVER, they manufacture audio grade electrolytic capacitors. The huge black RX11 and the smaller black and gold capacitors. If you search NOVER you will run into Anglia, Anglia is their distributor.
Resistors: Made by Dale
Transistors: Toshiba and Hitach audio products
The PCB boards are 2MM copper, gold plated.
Soldering: Audio-gd Products are soldered by Hi-Fi enthusiasts only, no sweathshops here. The soldering work is top quality verified by other Compass users also.
Quality Control: All Audio-gd products undergo 100 hours of burn in and testing before shipment.
[size=medium]The Compass AMP[/size]
Compass has a full sized desktop Amp. Just cause it has both DAC/Amp, doesn't mean anything was compromised. I posted a picture of the Gilmore Lite which is one of the more recommended discrete SS Amp here on Head-Fi for Mid-Fi users.
[size=medium][size=x-small]I also posted a picture of the KECES 171. This is to show what the KECES Amp is. KECES Claims their 152 is the 151 with something like the 171, but you can't tell since it's all on one board. Here with 151 and 171 can see for comparison to the Compass. Hope this helps for those who want to compare the Compass to the 152 from a design and technical aspect. Not a quality vs SQ comparison for those who I may have angered. FYI the 171 Amp is claimed to be improved over the 152 Amp, so it's not the exact same, but it gives you an idea, right?[/size][/size]
Compass is a Class A device just as all of Audio-gd's products. The final version for the rest of you will be 9 db /15 db. I think it has been suggested the HD650 should still be fine with 9 db option. For the Newbs like myself, who may wonder what is Class A?
Wikipedia quick description
Quote:
| Class A amplifying devices operate over the whole of the input cycle such that the output signal is an exact scaled-up replica of the input with no clipping. In a Class A circuit, the amplifying element is biased so the device is always conducting to some extent, and is operated over the most linear portion of its characteristic curve (known as its transfer characteristic or transconductance curve). Because the device is always conducting, even if there is no input at all, power is drawn from the power supply. |
Also some blah blah over in-efficient, but we are talking about headphone amps, not power/integrated amps.
[size=medium][size=x-small][size=medium]
Discrete vs OpAmp or IC Design:[/size]
http://www.head-fi.org/forums/f5/dis...opamps-157504/
The main reason why the Compass DAC and Amp looks drastically different from the KECES 151, KECES 171, KECES 152 is because the KECES products are all IC, Integrated Circuit Design.
[/size][/size] Quote:
| In electronics, an integrated circuit (also known as IC, microcircuit, microchip, silicon chip, or chip) is a miniaturized electronic circuit (consisting mainly of semiconductor devices, as well as passive components) that has been manufactured in the surface of a thin substrate of semiconductor material. Integrated circuits are used in almost all electronic equipment in use today and have revolutionized the world of electronics. |
IC Amps use what are called OpAmps, operational amplifiers.
Quote:
| An operational amplifier, which is often called an op-amp, is a DC-coupled high-gain electronic voltage amplifier with differential inputs and, usually, a single output.[1] Typically the output of the op-amp is controlled either by negative feedback, which largely determines the magnitude of its output voltage gain, or by positive feedback, which facilitates regenerative gain and oscillation. High input impedance at the input terminals (ideally infinite) and low output impedance (ideally zero) are important typical characteristics. |
Integrated OpAmps are designed to simplify the complexities of a discrete design. Discrete means that it uses discrete components, individual transistors, caps and so on. The mode of operation at each stage are determined by the user/designer/engineer. Whereas integrated OpAmps are multi purpose devices. That is probably the biggest difference. Integrated OpAmps are also Class B, meaning they are either on or off until an actual signal passes through. A discrete Amp can be True Class A, always on, full throttle, not dependent on music signal, passes on the signal amplified, input and output are fully balanced.
Integrated OpAmps can be biased into a Class A design, but it's not a true Class A. If it was, the integrated OpAmp would be destroyed, burned out.
Audio-gd Compass does use one HDAM, easiest definition, OpAmp on steroids. But the Audio-gd is fully discrete, which is why it's still a true Class A device. Audio-gd were the first to make a discrete HDAM, and continue to be only company to possess the original PCB designs. HDAM, an integrated version was first invented by Marantz who still have proprietary rights to them.
[size=medium][size=x-small]
[/size][/size]So while a cheaper and simpler way to create your DAC, and Amp would be to use OpAmps, this doesn't mean IC design is inherently bad. Just as there are bad discrete amps, there are good IC designs. But in general, Head-Fi and Audiophiles prefer discrete amps. I personally have more respect for engineers/designers who can create quality discrete devices.
[size=medium]HDAM in the DAC? Why?[/size]
So my question I had, the Amp is fully discrete, and the DAC is fully discrete. Regardless of whether the HDAM from Audio-gd are fully discrete or not, I was wondering why even use it. Then I got more confused as it seems with Solid State amps, one can have by rolling like Tubes, but roll OpAmps. So seeing the OpAmp placed in the DAC in the Compass confused me to no end. I asked earlier in this thread think it got looked over, so I been confused for weeks now.
For those who had the same confusion as me above, I believe this is the answer. Audio-gd uses their HDAMs to act as a buffer between the DAC and Amp, which will prevent negative feedback, reduce distortions, prevent overloading distortion and electromagnetic interferences. Maybe I'm wrong, but seems it conditions the signal from the DAC to the Amp so for example, there is black silence when no music plays, and that you don't hear any distortions when the volume is increased up and down through the Amp.
Quote from Wikipedia
Quote:
| A unity gain buffer amplifier may be constructed very simply by connecting the output of an operational amplifier to its inverting input (negative feedback), and connecting a signal source to the non-inverting input. For this circuit, Vout is simply equal to Vin. The importance of this circuit does not come from any change in voltage, but from the input and output impedances of the op-amp. The input impedance of the op-amp is very high (MΩ to 10 TΩ), meaning that the input of the op-amp does not load down the source or draw any current from it. Because the output impedance of the op-amp is very low, it drives the load as if it were a perfect voltage source. Both the connections to and from the buffer are therefore bridging connections, which reduce power consumption in the source, distortion from overloading, crosstalk and other electromagnetic interference. |
[size=medium]Earth vs Moon HDAM[/size]
Earth HDAM is rated Neutral. The Moon HDAM rated warm, mellow. The Sun v2. HDAM rated Bright, Forward.
I only have used and heard the Earth and Moon. Earth is definitely more neutral. The details are more emphasized, the mids are clearer, the bass with more impact, and forward, but not as enveloping. Due to all this the Soundstage sounds smaller with the Earth. With the AD900 they work amazingly well. The AD900 is meant for clarity, detail and punch, Earth gives it to them.
Moon was warmer, more laid back. The Soundstage was expansive, but the mids were more recessed. The bass while there was more, was harder to distinguish. It had a darker sound. It definitely will have its aficianados, me using the AD900 and future HD600 prefer the Earth. I believe the Moon would souund good with the HD650.
[size=medium]Compass DAC[/size]
The Compass DAC is 100% fully output discrete DAC. The input, is integrated, using the AD1852 D/A and the DIR9001 DSP to reduce jitter.
For Compass DAC comparison to Meier Audio Opera please read Drosera's review:
http://www.head-fi.org/forums/5452809-post3201.html
For Compass DAC comparison to DAC1 read Currawong's review:
http://www.head-fi.org/forums/5423587-post2105.html
Currawong's initial DAC review:
http://www.head-fi.org/forums/5354481-post890.html
Again for further details comparison to other DAC and Amps read Peete's review:
http://www.head-fi.org/forums/5420063-post2019.html
[size=x-small]The Compass DAC in this review will have picture comparisons to the KECES 151 DAC, which I feel on Head-Fi is most recommended by those interested in the Compass.
I also added an internal PCB picture to the Zero.
[/size][size=medium][size=x-small][size=medium]Audio-gd Compass Power Source[/size]
Just compare to something like the KECES for power source. Then look at something like Gilmore Lite which uses a Elpac WallWart. Any questions about the power source should be answered now. Compass is well fitted for power. I mentioned Gilmore Lite because in all the threads I've read, no one has asked, is the Lite well powered. But in this thread, there have been a few who questioned the Compass power, implying it needed more...
Underneath is the 50w Toroidal power source. Taken from Peete. [/size][/size]Fully shielded 50 Watt Toroidal transformer 100-120V or 220-240V primary - customer specified at time of order. No universal V switch used because of Sound Quality degradation. Transformer is rated at 120V
or 240V instead of cheaper 110-115 or 220-230V competitors.
Power source is also Full Sized. Notice in separate power source, the rectifier is screwed to the floor of the casing with the toroidal behind. Do the same for the Compass power source, there you go. I don't see the difference. Any questions still whether the Compass is well powered? /Flex
[size=x-large]Picture Time!![/size]
I think having these pictures right in your face to compare, should dissipate any thoughts that the Compass is some hybrid DAC/Amp combo, where in fact that is not the case. It's equivalent of stuffing a full sized DAC and full sized Amp into one package.
Disclaimer: These pictures are to demonstrate that the Compass comprises of a complete, separate, desktop, 100% discrete class A Amp. Also a separate, desktop headphone DAC, 100% discrete output. Not SQ or sound comparisons or anything related to that.
[size=medium]Compass Rectifier[/size]
[size=medium][size=x-small]Rectifier is a Alternate Current converter to Direct Current. [/size][/size]
[size=medium]Gilmore Lite[/size]
[size=medium]Purity Audio KICAS: Also Class A Discrete Amp
Compass Amp[/size]
[size=medium]KECES 171 Headphone Amp/PreAmp[/size]
[size=medium]
KECES 151 USB DAC
Compass DAC
Compass vs 152, just the Amp/DAC
[size=small]KECES 152 (Left), Audio-gd Compass (Right)
[/size]
Zero DAC/Amp: For $125 impressive. The DAC appears to be at the top and the Amp at the bottom in the picture.
So how big is it?!?!?
Gilmore Lite
KECES 152 (USB DAC/Amp Combo) w/ HD600
Compass: Yes it's even bigger!
[size=x-large]ACCESSORIES: Audio-gd Power Cable, Furutech FP-704, and more glorious pictures[/size][/size]
It seems to me, there is a lot of new headphone fans looking at this now gigantic thread, looking for their first substantial upgrade for an audiophile grade DAC, first true 100% discrete Amp, with Neutral sound.
And when they read descriptions here, there must be others like myself, without any reference points to compare to in front of them. Everything on the Compass and its accessories are oversized in comparison to my previous gear. Here are some photos for the new people to get an understanding, when I say RIDICULOUS!
Left: Neutrik 1/8" Gold Plated Center: Audio Technica Stock with 1/4" adapter Right: Furutech FP-704
Neutrik Locking Jack with Neutrik 1/8" and Furutech FP-704
Stock Power Cables compared to Audio-gd After-Market Power Cables
The stock vs Audio-gd cables size comparison
How big is everything in comparison?
AD900s look great still huh? Three years of being dropped, sat on, flying across room when flipping bed covers while AD900s lay on top listening before sleepy time, and still like new. Take that Grado fans! That's called quality build to survive the inadvertent stupidities, guaranteed I'd wreck any Grado within a weeks time.
Yeah as Sandchack said, don't let the power cables size diminish the size of the Compass. Here is is compared to my 15.4" Asus Laptop. And if you ever see, Asus Laptops, they are also built like tanks, notice a trend here?
For a DAC/Amp to just drive your headphones, Compass is huge huh? And yes that wood is my crappy old coffee table I use when I listen to tunes on the couch. My room has shrunk considerably since I shoved a couch in it.
[size=medium]Power Cable[/size]
Quote:
Sound wise, I would agree with Peete and Sandchak's observations, can go back and read them. As I don't want to repeat what they said, for me the biggest noticable change is the treble. I have no idea how, can't explain why, but the treble is no longer harsh. Its not as piercing as it was this morning, I'm listening to George Winston's Forest Album and its a joy to listen right now. As they said, the sound tone has not changed. Its just certain things sound better than before. The separation on the bass in some songs better. But thing I can say for sure, definitively for my ears, the treble has improved enough for me to say, yes there is an audible difference.
Is this thing worth $75 and plus shipping? Hmm can't say. But you will notice a difference, at least I have. I'm glad I have it.
[size=medium]Re-Terminated the AD900[/size]
Furutech, what a pain in the ass. Sat there for 5 minutes just deciding how solder them on, no directions, nothing on their website, nothing on this forum either. They could have made it hell lot easier. And yes its truly massive. The black ring for for the jack on the Compass, yeah the Furutech plug is about the same size. I still think its ugly, not what I was expecting at all. Although its really solid, I feel if I took a hammer to it, it would survive unscathed, OK exaggerating, but sure feels like it could. But its still ugly.
Sound wise, I am pleased. Running my AD900s with a 1/4" plug instead of a 1/8" with an adapter, definite noticeable difference. Another layer of veil is removed. The bass has been tightened a little more, with more impact. The treble is clearer and the more distinct. Overall its just more fun, and happy I decided to replace the plug. If you have a 1/8" on yours, I recommend re-terminating it. But I would use the Neutrik 1/4" gold plated. Its cheaper than the Furutech, slimmer design and easier to solder. Furutech is one fat, massive ugly plug that sounds awesome. But with the Furutech, definitely not placebo. The plug used by Audio Technica has a plastic stem that the the wires are soldered onto. Just seems to be far inferior design to the Furutech and positive that affected the sound.
[size=large]Compass Impression with MUSIC!![/size]
[size=small]Heavy Rock[/size]
Godsmack - Bad Religion
Hell yeah, its almost an adrenaline rush and a motivator to do something extremely reckless. The crashing cymbals are excellent, and the voice is so raw and can definitely tell he is screaming into the mic. Soundstaging is excellent, can definitely tell the cymbals used to keep up the beat is on the right, the crashes center and to the right, slightly above. The guitars have a sweet edgy sound to them, even the high notes, they don't whine smoothly like Clapton's fender, but as a proper heavy rock guitar should. The bass drums have that nice slam sound to it, higher pitch sound as it hits the plastic like material, but still have that bass thump.
[size=small]Grunge[/size]
Writing Alice in Chains as I listen. When I think of 90s rock, Alice in Chains with the whole Seattle Grunge phenomenon, well they were the epitome in my mind. No other band had such a distinct sound, their frontman Layne Staley has in my personal opinion the best grunge band vocals, no other frontman has come close since his departure. And Jerry Cantrell is amazing, his play definitely rank as some of the best guitar solos. One of the few guitarist able to go solo after the ending of his band and be better than the current rock/grunge bands. And personally, I can't think of anyone else who can the play G&L RAMPAGE like Cantrell, its orgasmic. Cantrell used the G&L RAMPAGE with Layne Staley but later in his career became known for his mastery over the Gibson Les Paul, listen to some of his solo material. G&L for those don't know was started by the founder of Fender, Leo Fender after he sold Fender.
Before continuing, for those who don't know who Alice in Chains are, yeah reunited, but they died after Layne Staley passed away, his voice can't be replaced, sniffle. Favorite album, jeez that's tough to say, favorite for today is Dirt. So you say, you are so full of it about Jerry Cantrell, fast track to 1:55 on Dam that River. That 25 seconds of guitar solo, yeah, that's what the G&L RAMPAGE sounds like in Cantrell's hands. So smooth, yet so gritty with grunge, his fingers just so effortlessly across the frets, there is no grating sound as with many guitarists when they slide their hand along the neck of the guitar. Its just plain smooth. The Compass lets you hear the distinct whine of the G&L. But you can't discount the rest of the band, their drummer like a "good" drummer does, sets the framework for the music. And he does it well, noticeably skilled, but never the focal point of the music. During transitions, Compass lets you hear the change of pace on the Cymbals and Snare drum well. Everything with Alice in Chains is in your face, and Compass brings the music to your face, definitely not behind, or distant, Layne is crooning in your face. Want to hear how distinct Layne's voice can be, listen to Godsmack. Yeah yeah, bet you didn't see that coming. Yep, Alice in Chains - Dirt - Godsmack, that's how awesome this band is. But Cantrell definitely is center stage on this song, aside from the reverberations in Layne's voice, which he personally does, this is not post recording production work, errie.
Let's backtrack, opening song Them Bones, Layne just screams a few times, ahhh! Compass you can hear his voice reverberate, post recording, or more of a slight echo. Ever so slight to give it volume. This is a short 2:32 song that is just a blast from start to finish. Cantrell steps in at 1:15 and I mean steps in. Everything is just background noise at this point. Layne is a solid rhythm guitarist. He tangos with Cantrell for short bit, Compass reproduces Cantrell's whine with complete separation from Layne's short burst of quick notes, that have no sonic edge at all. When Mike Starr sings in perfect unison, backup, with Layne you can always hear the two voices distinctly, no mistaking the two voices, always two presences.
I'd say if Alice in Chains sounds this great on the Compass, this is an excellent DAC/Amp choice for anyone who loves heavy rock/grunge/metal. You won't be disappointed. The edgy guitar whine is concert quality, the bass drum slam, you can visualize the drum kick exactly when it hits the drum surface, and Layne's voice, his high pitched, in minor key voice, as many described as haunting, is heard but along with his low, gutteral voice, often at the same time. If you were in a dark surrounding, only able to see dark shadows faintly, and Layne's voice was in your ears, I think a puddle would form at your feet. The bass guitar I'd say is the most blase aspect of the band's sound. But if you want to just close your eyes, you will hear it, as you listen more, can hear it more distinctly. Compass never loses the bass, its always there, but not in your face, as it would be if it were a lower quality amp. Bass guitar has a lower sound, closer to the frequencies where its you gotta feel in the chest to hear, but no worries, as I said, Compass brings it to you with relative ease.
If you'd like to hear some more Alice in Chains Awesomeness, look no further than Facelift - Man in the Box. JeeEEeesSuUUuS ChriIIiISssT, Layne, that's what Layne's voice is all about. While the guitar play from both Cantrell and Layne is excellent through the song, it's at 3:15 when their play "dance" with each other. At 3:45 Cantrell does something I can't explain, but its one of the coolest sounds from a guitar. I won't eve try to describe it, but its really really cool, and have to say, I never noticed it until I listened on the Compass. Cantrell's guitar play as I said before, generally is very smooth. But on Sea of Sorrow, at 3:55 you can hear that he has mastered syncopation also, just because he doesn't do it often, don't let that fool you. Not as good as Vince Giraldi, but that's unfair as no other instrument comes close to the Piano in that aspect, as far as guitars go, Cantrell and Compass about as good as it gets in a fast paced rock ballad.
Its an excellent heavy rock/grunge/metal DAC/Amp. I'd imagine, this is what Solid State amp is all about when listening to fast, energetic, jump around crazy, rock, head banging with imaginary flowing long hair, entangled from the furious movements. When listening to rock on the Compass I wish I played the Guitar. But when I listen to George Winston, I remember again why I chose to play the piano instead.
What I love most about the Compass and Rock. Well Rock my opinion should be played LOUD, give the music some authority, let the singer come up front to your face. No matter how loud, how far I crank the Volume up, the music's detail, and quality never deteriorates. The bass never decays, never becomes muddy. The treble never becomes sparkly, or unbearable. The Mids never become overwhelmed by the increased volume of the bass, the music remains in balance. This is definitely the biggest difference in my music listening experience so far from other Amps, Soundcards I've listened to in the past, and why I am so addicted to the music right now.
[size=small]Solo Piano? Some George Winston and David Lanz.[/size]
George Winston - The Music of Vince Guaraldi - The Masked Marvel
One of my favorite solo Piano Jazz pieces, and no one has the style Winston brings to this piece. Every key stroke is heard, separation again excellent. It starts off with what you expect from this composition, then at 1:40 is when Winston says, hey, I'm better than you ever will be. You thought Guaraldi syncopation was hard to master, I pity you and laugh with impunity at your efforts. Anyone who has tried to play this work to perfection can verify, Guaraldi is one of the toughest to get right, yeah yeah lot of people can play his stuff, but almost everyone does it WRONG. I personally have never heard anyone while in High School, recitals play correctly. So fast, yet so effortless, can visualize those incredible fingers moving in hummingbird speed. So many notes within a second, and you hear every single one. Piano I still believe to be one of the toughest sounds to be reproduced by analog/audio devices, each note on a piano has so many different frequencies, and the Compass does it very well. Its not perfect, can tell you are not standing next to the grand piano, but this as close I've gotten. The imaging is right on, you can visualize as Winston moves his hands to the right and left with the speed of a confident, and rightfully arrogant master. Compass lets you hear the forceful play of Winston, he doesn't hold back, no tentative key strokes. While there is the slight carry over of sound from key to the next, the following keys are very clear. This is what Solo Piano is about.
George Winston - Plains - Teach Me Tonight.
Here Winston is accompanied by a percussion and stand up bass. Its very obvious with Compass that it is a stand up bass, even though its far recessed in the background, you can still hear the distinctions that differentiate a stand up to electric bass. Again, there is no mistaking at any point between the bass notes on the piano and the bass notes of the bass. There is no lag, so fast, even the AD900s seem to be at its limit to keep up with the Compass. The high notes, as Winston slams them in dramatic change of pace and volume, sounds excellent, ears do not hurt for any piercing treble as you might from an inferior source. This entire song is change of pace, change in volume, without any indication ahead of time, I love listening to this composition.
David Lanz - An Evening with David Lanz - Leaves on the Seine
This is a live recording as the title suggests. The recording is very poor in comparison to a studio recording. You do have to jack up the volume a bit to hear it at decent volume, but lucky for us, the Compass complete back silence adds no distortion at all. This piece is slow, good flow. Lanz has a far different style, I don't want to be sexist, but he plays like a girl. Its very flutter like across the keys, not nearly as definitive, or authoritative as Winston. Compass lets you hear immediately the differences, as any Piano player knows, the sound of each key is determined by the pianist. You can hear every rustle and cough of some lame audience member who can't cover his/her mouth right. Even hear a whisper in the background.
David Lanz - Skyline Firedance - Dark Horse.
This is a studio piece. Not unlike his live recording, his studio recordings are also sub-par. Its a real shame since he is a great pianist in his own right, and style. Here you can hear his music free from rustles of clothing, whispers and coughs. At one point you can hear the creek of the bench as he shifts weight. Lanz spends more time in higher octaves, the notes linger longer, and you can hear hover after being played. But that doesn't detract in the least bit from the continuing, quick, fast notes following. This piece is fast, and while Lanz definitely plays more forcefully, you can still visualize that his style of play is to me, womanly, flutter like. There are some points where you cannot mistake it is in fact a man playing though.
Overall conclusion:
The Compass reproduces the sounds and intricacies of the Piano better than anything else I've been able to sit down for a while and listen to. But its not perfect, but that largely has to do with the recordings. A recording just doesn't quite bring the feeling of the music as your hands press firmly against the ivory keys. I'd much rather listen to Winston than on my Uncle's Denon top of the line system with custom 10K speakers, though.
[size=small]Orchestra[/size]
How about some Orchestra music? I do not have a collection of Classical, when I listen to Classical it's when I do work, study and reading, it's background. And there is just too many Classical pieces for me at this point to collect, I listen with streaming 192 internet. And well, its not that great in quality, I won't even both reviewing.
What I do have is E.S Posthumus. This is incredible work.
E.S Posthumus - Cartographer (Piri Reis Remixes) - Nasivern Pi
This composition is without the main vocalist. The orchestra instead takes center stage. There is an Chorus in the background. The music has a complete percussions including tom toms, timpani, what sounds to me a series of bass drums, similar to japanese drums. The chorus always background, never in front. With a full orchestra, wonderful violins, you can always still hear every chord of an acoustic guitar accompaniment. There is a slow, pleasant solo done by a flute, which you can hear the breathy notes, the distinctive sound as the air passes through the flute from note to note to say, this is not electronic reproduction. This is as full, complicated and all encompassing sound as I can imagine and nothing is lost with the Compass. Nothing at all.
E.S Posthumus - Cartographer (Piri Reis Remixes) - Isunova
One of the most moving music I have heard. The Violins here take the place of the vocalist. Again Chorus in the Background. But its incredible, you have one set of Violins playing the Vocal's melody, the others backing it up and proividing support. If you love Violins, you will love this on the Compass. The Percussions is excellent also, every kind of percussion sound you can imagine just crashing in succession, in unison, in separate tempos, its eargasmic. Then the Violins sing, with as much passion as a Soprano, they are singing. There are accompanying electric bass, acoustic guitar and in this insanity of immense volume and diversity of sound, nothing is left behind with the Compass. Any questions of whether the Compass has speed, detail and clarity are answered with a resounding YES!
Conclusion:
For this kind of complexity, speed and congestion of sound, you gotta have a fast, Open Air headphone. For those who think DT770 are balanced and got good sound, I'm sorry, you will be doing a great diservice listening to E.S Posthumus with the detail that Compass is providing effortlessly. Even the D2000 when I listened before, the closed enclosure just wouldn't allow you to hear everything right, something was wrong. The Compass will provide a balanced sound, with nothing left behind, this means you gotta use Headphones that can keep up. I believe with the Compass, its the Headphone that will be the bottleneck. Meaning, I believe the potential for the Compass is beyond what AD900s also, if I were to use better headphones, Compass would give everything it could manage. If you don't have a neutral/balanced headphone with excellent Mids, then don't even bother to listen to classical and orchestral music with the Compass.
[size=small]For Trance, very short impression, listen for yourself![/size]
I am currently listening to Lostep's Burma. After Sasha featured Burma on his Involver album, Lostep was on every Progressive Trance lover's lips, quickly became fan favorites fast. This launched Lostep's reputation and popularity and they came out with their own album, and its fantastic. Burma is over 10 minutes of endless distinctive bass lines and beats. Like all good Trance, Burma has at least two beats constantly and one to two bass lines, you can hear all three/four with the Compass easily. Love this song. You want basshead sound, you will have to change settings, but from Neutral, the bass is dream like, just floats, but with the emphasis that always says, come back, I'm still here.
I'll just say, so far Lostep, BT, Sander Kleinenberg, James Holden, Sasha all sound incredible on the Compass. If you love Trance, you will love Compass. The full spectrum of detail and incredible range of sound frequency that no other genre of music can match other than Orchestra, Compass does it with ease.
[size=medium]Ranking the Sounds[/size]
Everything can't be perfect, so what genres of music do I like mos with the Compass?
1). Grunge/Heavy Metal
2). Trance/Atmospheric
3). Ochestra
4). Brit pop/Soft Rock
5). Solo Piano, (Piano is just a tough sound
