mrarroyo
Headphoneus Supremus
- Joined
- Jul 27, 2005
- Posts
- 19,073
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- 43
I had placed this observations as part of a larger thread. However my impressions took three days and do to the number of pictures I had to split the post. Thus I decided to start this new thread, hope it does not bother you the reader to see it in two places.
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[size=small]Part I:[/size]
On May 2, 2009 my Graham Slee Solo SRG and its PSU1 ( Solo SRG Headphone Amplifier: Solo Studio Reference Green Headphone Amplifier ) reached its 550th hour of burn in. Thus I decided to start some comparisons using various cans and music. You will notice that I will put a lot of picture and I hope they break the monotony of reading. Specifically for this round I used:
1.Ultrasone HFI-780 which has been re-cabled by Alex of APureSound ( APureSound - Where The Music Is Always Pure - APS Audio LLC. ) using a 7 foot long V3 silver plated wires covered in techflex and terminated in a ¼” Neutrik plug. The diode board in the HFI-780 has been removed and the pleather pads have been re-placed w/ a set of velour pads made by Beyerdynamic for the DT250/280.
2.Denon AH-D5000 that has been modded by MarkL ( Home ) including a pair of his V4 Bubinga wood cups installed. The cable is the stock one.
The music is stored via iTunes as Apple Lossless files on my Dell desktop. I use a glass optical cable to connect a Chaintech AV710 to a Monarchy NM24 DAC. Since most of you use SS DACs I used the SS DAC output of the Monarchy to feed the amps. As far as music for this first round I chose Diana Krall, specifically the following albums.
1.All For You: A Dedication to the Nat King Cole Trio
2.From This Moment On
3.The Girl In The Other Room
As of now I have three additional solid-state amps at the house. However one of these is a Graham Slee Novo powered by a switching wall wart. So I decided to use a highly modified Jaycar Amp (Australian based amp) and a highly modified Musical Fidelity X-Can V2. For those not familiar with the Jaycar it starts life as a kit sold by an electronics store in Australia. It is sold in two parts; the amp section and the power supply, to this you must add the transformer, case, volume pot, on/off switch, and rca’s.
Stereo Headphone Distribution Amplifier - Jaycar Electronics
Headphone Amplifier Power Supply Kit - Jaycar Electronics
The Jaycar I own was built by a very knowledgeable “old codger” who proceeded to highly tweak the unit by using better components, not necessarily boutique but definite upgrades. He also added a board to eliminate the ripples in the power supply, JLH board and a stepped attenuator. Note my unit uses a metal LM4562HA, pic below.
The internals of the finished Jaycar looks like.
The second amp I used started life as a basic Musical Fidelity X-Can V2. This amp has fallen out of favor and to be honest not many cared for it outside of Great Britain. This is IMO a pity because it is a killer amp with just a few mods, and what better mods than those developed by PinkFloyd (Mike Grierson). His mods have evolved over many years of tweaking followed by listening. The mods done to my V2 include:
1.Ultrafast Diodes
2.Panasonic FM/FC 105C capacitors
3.Evox Polypropylene capacitors
4.Since my sources do not output DC I removed the DC blocking caps w/ wires w/ ferrites (lowered floor noise)
5.Reduced the gain from about 9 to 5.7
6.Alps volume pot
7.Replaced power supply transistors w/ ZTX853/953
8.New Jalco ¼” headphone jack
9.Purple light (just for fun)
10.Dampen the bottom interior of the case with dynamat
11.Using Russian 6H23EB valves
12.Using the latest Little Pinkie V3i PSU
Lastly here are some beauty shots of the Graham Slee Solo SRG.
As you can see by the pictures the Solo SRG has two inputs that are user selectable via a toggle switch in the front panel. You will also notice there is a ground post on the back panel, this is meant mostly for those who use the switching wall wart. Although I have the upgraded power supply (PSU1) I still run a wire from the ground post on the back of the Solo SRG to a ground post on the back of my Monster HTS 3500 MkII. Lastly there is no on/off power switch, according to Graham the unit is intended to be kept on at all times, if this bothers you then it is easy to unplug the PSU1.
The Solo SRG w/ PSU1 sells for 425.11 PB plus 39.37 PB with expedited SH to the USA. The price has remained relatively stable, however the BP has regained some of its strength. Thus an amp, which could have been bought for well under $600, a couple of months ago will now set you back close to $700. I wish I had a $650-$800 solid state amp to compare with the Solo SRG so I could comment on value, sadly I will only be able to comment on its sound.
However I have asked three members of Head-Fi and it appears two have already agreed to put the solo through its paces, I know one owns a solid-state amp that retails for over $1,250. This brings the question if it is “fair” to compare an item with another that retails for almost twice as much. Personally I would feel more comfortable if it was closer to 20% difference but I also know we go crazy in this hobby and what started as a $100 headphone ends up in a $2,500 expenditure.
So over two pages of “stuff” and yet nothing on how the Solo SRG w/ PSU1 sounds? So where should I start? I think with the soundstage, it is very wide and deep w/ openness to the presentation that keeps you coming back for more. The music is presented in such a way that every note has its place and makes for a very engaging and enjoyable listening experience.
Although people talk about bass and treble extension the reality is that most of the music is in the mids. This is one area where the Solo SRG excels at; it is very clear and detailed w/ lots of air in between the notes. As stated earlier the soundstage is wide and deep, this makes for a very easy exercise to place the instruments as well as allowing the singer “the room” to strut his/her stuff. All of this allows you to pick-up the start and end of notes, for example cymbals and hi-hats. In other words it is very musical and it presents the material with excellent control and micro detail. All of this IMO makes for non-fatiguing listening sessions, yes it keeps you tied listening to your favorite music.
There is excellent treble extension this allows for notes to cut through and for the listener to place the various instruments. The amp kept its composure and remained tight and articulate.
The bass is tight and goes deep, although at times it is a bit light. What it has is very clean and punchy while staying in control. I found that once I stopped listening to the bass as compared to other amps it did not seem lean at all, actually it was at times a bit much with the Ultrasone headphone.
More to come.
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[size=small]Part I:[/size]
On May 2, 2009 my Graham Slee Solo SRG and its PSU1 ( Solo SRG Headphone Amplifier: Solo Studio Reference Green Headphone Amplifier ) reached its 550th hour of burn in. Thus I decided to start some comparisons using various cans and music. You will notice that I will put a lot of picture and I hope they break the monotony of reading. Specifically for this round I used:
1.Ultrasone HFI-780 which has been re-cabled by Alex of APureSound ( APureSound - Where The Music Is Always Pure - APS Audio LLC. ) using a 7 foot long V3 silver plated wires covered in techflex and terminated in a ¼” Neutrik plug. The diode board in the HFI-780 has been removed and the pleather pads have been re-placed w/ a set of velour pads made by Beyerdynamic for the DT250/280.
2.Denon AH-D5000 that has been modded by MarkL ( Home ) including a pair of his V4 Bubinga wood cups installed. The cable is the stock one.
The music is stored via iTunes as Apple Lossless files on my Dell desktop. I use a glass optical cable to connect a Chaintech AV710 to a Monarchy NM24 DAC. Since most of you use SS DACs I used the SS DAC output of the Monarchy to feed the amps. As far as music for this first round I chose Diana Krall, specifically the following albums.
1.All For You: A Dedication to the Nat King Cole Trio
2.From This Moment On
3.The Girl In The Other Room
As of now I have three additional solid-state amps at the house. However one of these is a Graham Slee Novo powered by a switching wall wart. So I decided to use a highly modified Jaycar Amp (Australian based amp) and a highly modified Musical Fidelity X-Can V2. For those not familiar with the Jaycar it starts life as a kit sold by an electronics store in Australia. It is sold in two parts; the amp section and the power supply, to this you must add the transformer, case, volume pot, on/off switch, and rca’s.
Stereo Headphone Distribution Amplifier - Jaycar Electronics
Headphone Amplifier Power Supply Kit - Jaycar Electronics
The Jaycar I own was built by a very knowledgeable “old codger” who proceeded to highly tweak the unit by using better components, not necessarily boutique but definite upgrades. He also added a board to eliminate the ripples in the power supply, JLH board and a stepped attenuator. Note my unit uses a metal LM4562HA, pic below.
The internals of the finished Jaycar looks like.
The second amp I used started life as a basic Musical Fidelity X-Can V2. This amp has fallen out of favor and to be honest not many cared for it outside of Great Britain. This is IMO a pity because it is a killer amp with just a few mods, and what better mods than those developed by PinkFloyd (Mike Grierson). His mods have evolved over many years of tweaking followed by listening. The mods done to my V2 include:
1.Ultrafast Diodes
2.Panasonic FM/FC 105C capacitors
3.Evox Polypropylene capacitors
4.Since my sources do not output DC I removed the DC blocking caps w/ wires w/ ferrites (lowered floor noise)
5.Reduced the gain from about 9 to 5.7
6.Alps volume pot
7.Replaced power supply transistors w/ ZTX853/953
8.New Jalco ¼” headphone jack
9.Purple light (just for fun)
10.Dampen the bottom interior of the case with dynamat
11.Using Russian 6H23EB valves
12.Using the latest Little Pinkie V3i PSU
Lastly here are some beauty shots of the Graham Slee Solo SRG.
As you can see by the pictures the Solo SRG has two inputs that are user selectable via a toggle switch in the front panel. You will also notice there is a ground post on the back panel, this is meant mostly for those who use the switching wall wart. Although I have the upgraded power supply (PSU1) I still run a wire from the ground post on the back of the Solo SRG to a ground post on the back of my Monster HTS 3500 MkII. Lastly there is no on/off power switch, according to Graham the unit is intended to be kept on at all times, if this bothers you then it is easy to unplug the PSU1.
The Solo SRG w/ PSU1 sells for 425.11 PB plus 39.37 PB with expedited SH to the USA. The price has remained relatively stable, however the BP has regained some of its strength. Thus an amp, which could have been bought for well under $600, a couple of months ago will now set you back close to $700. I wish I had a $650-$800 solid state amp to compare with the Solo SRG so I could comment on value, sadly I will only be able to comment on its sound.
However I have asked three members of Head-Fi and it appears two have already agreed to put the solo through its paces, I know one owns a solid-state amp that retails for over $1,250. This brings the question if it is “fair” to compare an item with another that retails for almost twice as much. Personally I would feel more comfortable if it was closer to 20% difference but I also know we go crazy in this hobby and what started as a $100 headphone ends up in a $2,500 expenditure.
So over two pages of “stuff” and yet nothing on how the Solo SRG w/ PSU1 sounds? So where should I start? I think with the soundstage, it is very wide and deep w/ openness to the presentation that keeps you coming back for more. The music is presented in such a way that every note has its place and makes for a very engaging and enjoyable listening experience.
Although people talk about bass and treble extension the reality is that most of the music is in the mids. This is one area where the Solo SRG excels at; it is very clear and detailed w/ lots of air in between the notes. As stated earlier the soundstage is wide and deep, this makes for a very easy exercise to place the instruments as well as allowing the singer “the room” to strut his/her stuff. All of this allows you to pick-up the start and end of notes, for example cymbals and hi-hats. In other words it is very musical and it presents the material with excellent control and micro detail. All of this IMO makes for non-fatiguing listening sessions, yes it keeps you tied listening to your favorite music.
There is excellent treble extension this allows for notes to cut through and for the listener to place the various instruments. The amp kept its composure and remained tight and articulate.
The bass is tight and goes deep, although at times it is a bit light. What it has is very clean and punchy while staying in control. I found that once I stopped listening to the bass as compared to other amps it did not seem lean at all, actually it was at times a bit much with the Ultrasone headphone.
More to come.