Recent Images In This Thread
- productAKG K 702 Headphonestagged by System, 9/15/11
- productAudio Technica ATH-AD700tagged by System, 9/15/11
- productGrado SR60 Headphonestagged by System, 9/15/11
- productHEAD-DIRECT HiFiMan RE-262tagged by System, 9/15/11
- categoryHeadphone Amplifierstagged by System, 9/15/11
- categoryHeadphonestagged by System, 9/15/11
Related Forum Threads
- Lookng for new headphones! Last post on 7/2/12 at 11:51am in Headphones (full-size)
- Headphone amp to match with AKG K702s Last post on 1/1/12 at 6:35pm in Headphone Amps (full-size)
- Ultrasone Pro 900 - Fiio E7/E9 Combo. Last post on 8/28/11 at 3:54pm in Headphones (full-size)
- Headphones/ AMP Last post on 8/18/11 at 3:37pm in Headphones (full-size)
- Few questions? Last post on 7/24/11 at 7:18pm in Headphones (full-size)
Last edited: 8/18/12
- Diy Beginners GuideLast edited: 7/22/13
- Buying Guide Headphones By Price RangeLast edited: 10/26/12
- A Hopefully Helpful Headphone Buying Guide For Newbies By BoomanaLast edited: 1/6/13
Cayin iDac-6 and iHA-6 A story of a beautiful duo and my honeymoon with them Prequel Let me rewind just a tad before we begin. I am one of many who interminably chase the...
I already had Sennheasier HD 25 iis which are great on-ear headphones but i wanted to try these after a good experience with the Yamaha EPH-200s. I really enjoyed the Yamaha house sound and these...
Oriveti Primacy: Making music sound like music Introduction Oriveti seems to be a rather obscure company, without any big breaks or long-running hype trains. They offer a single model that...
Review: NwAvGuy's O2 DIY Amplifier - Page 3post #31 of 15508/29/11 at 5:50am
Gear mentioned in this thread:post #32 of 15508/29/11 at 10:18ampost #33 of 15508/29/11 at 10:41amThread Starterpost #34 of 15508/30/11 at 8:25ampost #35 of 15508/30/11 at 3:54pmpost #36 of 15508/31/11 at 1:52ampost #37 of 15508/31/11 at 10:06amThread Starterpost #38 of 15508/31/11 at 12:34pmpost #39 of 15508/31/11 at 1:59pmThread Starterpost #40 of 15509/1/11 at 7:51am
Turn the flash off, macro on, steady the camera on something reasonably steady (like a stack of books), and point any available light at the board.
If if you have a nice powerful desk lamp on a flexible arm put it as close to the board, while being outside the frame of view of the camera.
And shoot! :)
I've tried to steady my camera and use independent lighting, but it just doesn't come out how I'd like currently. I'll see if I can take better pics, but once again for those wanting a general template pic the designer probably has infinitely better than what I can get with my oldish point and shoot.
We want to see your build.
Just take a tall glass from your kitchen and rest the camera on it. Use the macro setting and you're good to go. All you need for lighting is regular room light, or put the board on your laptop keyboard and use the light from the screen. Set the camera for florescent lighting, macro setting, rest on tall glass if you need it, but I found that the laptop light was enough to take very sharp pics hand held...
Here's one I took for knife-Fi with the light from my laptop screen (click to enlarge)post #41 of 15509/1/11 at 9:21ampost #42 of 15509/1/11 at 10:14am
Both the Asgard and AudioGd products are cases of "Buzzword Design", IMO. Suffice to say that being fully discrete or single-ended has precious little to do with audio quality, so I wouldn't be surprised if they were actually audibly inferior. The only comprehensive measurements I've ever seen for AudioGd products (their discrete opamps) were abominable.post #43 of 15509/1/11 at 10:26ampost #44 of 15509/1/11 at 2:03pm
/mild rant alert
What I mean is that when I head on over to the Schitt/AudioGd sites and read the descriptions/FAQs for their products, I become incredibly sceptical of their offerings - mainly where they follow design practises which seem hugely counter-intuitive and justify them incredibly flimsily. For example, to quote the page for the AudioGd Sparrow:
"The Sparrow uses ACSS (Audio-gd Current Signal System, which is a current signal transmission system). ACSS is a non-feedback technology make by Discrete amp. Most people had know the global feedback can offer better specs for the meters, non-feedback can't please the meters but can offer better sound for human's ears . Here is a conflict of the class circuits. But the ACSS arrive a new field, it can offer least coloration sound which is more neutral with very low distortion and high linear . So it can recur the dynamic, detail and neutral sound but not bright or harsh."
This is pandering to audiophile mythology, not solid design practises. Sure, it's possible to get acceptable results whilst avoiding global feedback, but why would a designer begin their design process by handicapping themselves? Perhaps they're referring to feedback used incorrectly in some way? But no, they admit it will bugger up their measurements.
It gets worse - they go on to paint the absence of a voltage switch as some ludicrous crusade to prevent audio degradation and to ensure that their users can hear the effects of upgrading their power cables. At this stage I'm feeling more than a little cynical regarding their marketing literature. Regrettably, they're not done - it's "fully discrete."
Now, fully discrete is all very well in power amps, but in headphone amps it doesn't make any sense. Firstly, it is monstrously expensive to do well, both in R&D and in sheer parts cost. Even then, you're going to have a phenomenally hard time equalling the performance of a cheap little IC opamp. Trying to paint this as "not using cost cutting measures" is utter crap. The only examples of AudioGd's attempts at discrete opamps I've seen measured terribly - doesn't fill me with confidence regarding their designer/s.
This is finally exacerbated by how they describe their products. The one thing that puts me off a company's product range is when they assure me the sound isn't "digital."
Call me paranoid, but I get the feeling that these design decisions are not justified by some incredible crusade for pure audio. This is, as I put it earlier, "designing by buzzwords." Audiophiles have various irrational dislikes of things such as IC opamps and get all excited when somebody shouts "Fully Discrete!" at them. Thus, people don't design for low distortion, or maximum neutrality, or anything like that. They design to pander to audiophile mythology and do so at such a price point and so utterly that you become incredibly wary as to the quality of their products.
Let's move on to Schiit. In some ways (such as basic literacy - I know AudioGd are Chinese, but other small companies pull off rather better translations) they are superior, but they still ultimately annoy me in much the same way. The very first line on the Asgard's web page reels out its fully discrete credentials and follows up with the line "No opamps, no shortcuts" - This is, again, pandering to audiophile mythology, so people on Head-Fi can go "Ooh, fully discrete at such a low price!"
I was recently further annoyed by the publicity spiel for their new DAC:
"The ugly truth about most DACs in this price range is that they sacrifice every single one of your original music samples to get their magic "192kHz" spec"
This is scaremongering crap, playing to audiophile paranoia. The Benchmark DAC1, for example, resamples to 110khz and I'll wager it beats the crap out the Bifrost delivering - god forbid - what's on the recording! With minimal variance!
Compared to the "Fully Discrete" BS however, it's small fries.
And don't get me started on Burson. Their "The Naked Truth About Opamps" article single-handedly dissuades me from ever touching any of their products with a barge pole - I could make up something better myself. Seriously, raving on about "The size of opamps compared to discrete circuits causes forms of quantum degradation which are only clearly apparent in listening tests." would have been more plausible.
I realise this is reading like an incredibly ill-natured rant against some of the most popular products on Head-Fi. But when a company sells its products to irrational audiophile criteria...on the one hand, I can't blame them. Nobody wants to hear about how little distortion your amplifier has when you can rave on about how it uses no evil "short-cut" opamps - even if thanks to that 0.1% THD is the best you can manage on your own specs - that's not Hi-Fi by the standards of a SS power amp in the 1980s, let alone a modern headphone amp. When I read the list of reasons why I should purchase such company's products, I don't expect them to reel off the number of ways they handicapped their designs.
I understand that it is entirely possible to make an OK product despite such self-imposed stumbling blocks - but when half their publicity literature is about claiming that they are all plus points... Meanwhile, I can't really begrudge companies playing a little to their audience. But likely screwing over their product so the marketing department has something to say? People will say "Oh, but this distortion is inaudible," - but how can all these audiophiles claim to care about the supposedly subtle and unmeasurable when they don't seem to care about the basic, measurable aspects of a product that determines that it is competent?
Good grief, this is getting more rant-y by the second. The really infuriating part is that if you were ever to post something like this in its own thread, I can predict the first 5 responses:
1: OMG, not another measurement wh***, bugger off.
2: I can hear how opamps corrupt the music - you must be deaf.
3. I think designer "X" knows a little more than you do (delivered condescendingly)
4. Fully discrete is always better because opamps are cheap.
5. Well I like how they sound! Some people, always stirring things up...
So the best I can say is that companies who design primarily to buzzwords will never, ever get any of my money. It's a pity, because designing in this way is so common you have to pay hugely over the odds simply to ensure that the designer didn't decide he knew more about opamp design than the entire R&D department of Texas Instruments.
Edited by Willakan - 1/29/12 at 1:11pmpost #45 of 15509/1/11 at 9:38pm
I think Willakan has a sensible point about discrete vs opamp. The more components in a design, the more variance that can occur between assemblies of the same design. With discrete there are collections of transistors, caps, resistors, etc from different vendors. Of course, they are spec'd within a tolerance but there is variance. So it is probable that each amp rolling off the assembly line has a unique signature. On the other hand, opamps are manufactured from monolithic blocks, as far as I know, so I expect they will be self-consistent.
Opamps and buffers from National and others claim incredible low distortion. They provide reference boards (too expensive for DIY) which others vendors can test for quality.
IMO, discrete designs without blocking capacitors are too difficult and risky for DIY. One mistake, and poof goes the expensive headphones. Stick with opamps.
This thread is locked
- Review: NwAvGuy's O2 DIY Amplifier
Gear mentioned in this thread:
- Diy Beginners Guide
- › Violectric HPA V281 - Vorsprung durch Balanced 34 seconds ago
- › Earbuds Round-Up 43 seconds ago
- › XDuoo X3 DSD 24Bit / 192KHz CS4398 Chip Lossless Music Player 2 minutes ago
- › Venture Electronics (VE) Monk & Monk Plus: a $5 earbud that taking... 2 minutes ago
- › Little Dot MK VI / Little Dot MK VIII SE Owners Unite 5 minutes ago
- › Sennheiser HD650 w/ HD600 Headband 6 minutes ago
- › Audeze SINE Series 8 minutes ago
- › Sennheiser HD 600 Impressions Thread 12 minutes ago
- › Good Points for a Hi-Fi review? 12 minutes ago
- › Campfire Audio - Introducing 2 new models Hello Andromeda and Nova 13 minutes ago
- › Cayin iHA-6 by Dillan
- › Cayin iDAC-6 by Dillan
- › Yamaha HPH-200 Headphone (Black) by harry501501
- › RHA MA750i by meetpatel3686
- › ORIVETI PRIMACY - Whole Aluminium Body, Triple Drivers Hybrid 2... by ustinj
- › Audio-Technica ATH-CK10 Portable In-Ear Headphones by mrstrangeguy
- › Focal Utopia by x RELIC x
- › Campfire Audio Nova by Brooko
- › Flare Audio R1 Headphones by Mr Vicarious
- › FiiO X5 2nd gen Premium Hi-Res DAP by greencalx
- › Flawless Album Suggestions
- › The Audiophile Scene in a Third World Country...
- › Mad Lust Envy's Headphone Gaming Guide,...
- › Mad Lust Envy's Headphone Gaming Guide,...
- › Mad Lust Envy's Headphone Gaming Guide:...
- › Chord Mojo FAQ
- › Head-Fi Logo Gear
- › All about iPod Touch 6G as digital transport
- › List of major HiFiMan HE1000 reviews,...
- › Can I change my user name? Can I delete my...