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2006 vintage upgrade?
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jamescodway View Drop Down
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    Posted: 06 Mar 2009 at 10:32pm
Graham,

I seem to remember some mention... somewhere... maybe... of an option to have one's 2008-purchased unit (September 2006 vintage) upgraded to latest SRG spectacular specification.

I (currently) have insufficient skill to risk the likely fatal damage from an attempted DIY mod... is it feasible and/or vaguely economic to return my unit for an upgrade? I already have a PSU 1.

Doesn't it have to be worth at least a good % of the price of a new Novo... ?


Kind regards,

James
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mrarroyo View Drop Down
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Points: 1401 		Post Options Post Options   Thanks (0) Thanks(0)   Quote mrarroyo Quote  Post ReplyReply Direct Link To This Post Posted: 07 Mar 2009 at 1:20am
James, I can not speak for Graham but I will go out on a limb and say the it would not be cost effective if the mods are extensive. This because you would have to go into an amp that is a couple of years old and remove components. Then in some cases there might be jumpers and cutting of pcb traces. Lastly if extremely complex there would be components for which holes may have to be drilled into the board.
 
The only way this could be cost effective is if the individual user does the mod. Otherwise Graham and his staff may spend more time on the older unit than starting from scratch. I would sell the unit you have and buy a new one, you most likely will come out ahead.
Miguel
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jamescodway View Drop Down
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Points: 320 		Post Options Post Options   Thanks (0) Thanks(0)   Quote jamescodway Quote  Post ReplyReply Direct Link To This Post Posted: 10 Mar 2009 at 9:17am
Miguel,

given 'radio silence' from Yorkshire on the subject... thank you for your very specific comments and suggestion.

Best wishes

James
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Graham Slee View Drop Down
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Points: 16314 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Graham Slee Quote  Post ReplyReply Direct Link To This Post Posted: 10 Mar 2009 at 10:44am
We are doing the DIY (as well as factory fit) SRG upgrade for all 2004 onward silver case Solo's.

It's just that it's been a bit difficult getting everything done lately thanks to our feckless Prime Minister pouring derision on the UK economy and all who try to sail in "her"...

But the www.diy-audio-kits.com website is online and developing nicely, and IT WILL FEATURE THE SOLO SRG UPGRADE KIT shortly. It will also give details on how to get your post 2004 Solo factory upgraded to SRG status.

If you give it a few days more you will see it all at the above website.

Thanks,
Graham
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jamescodway View Drop Down
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Excellent!

Thank you
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faudrei View Drop Down
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Points: 10 		Post Options Post Options   Thanks (0) Thanks(0)   Quote faudrei Quote  Post ReplyReply Direct Link To This Post Posted: 24 May 2009 at 10:01pm
Since the "Upgrade to SRG" posts are linking here - guess I'll have to revive this thread.

By reading the reviews from fortunate users that have had the opportunity to compare "Green" (or other, pre-2008) and the latest SRG Solos I also have decided to upgrade my "Racing Green #69" to SRG. That is - once the upgrade kit will be available.

So - an cortious "ping" to Graham on the "Upgrade to SRG kit" subject.

...and I would also kindly ask him a couple of questions:
  1. Having not heard the SRG, the only thing that I would add to my "Racing Green #69" is some more grunt in lower notes of AKG K701. Can SRG help here?
    I have read about SRG's impendance matching feature, but K701 are, IMO, really difficult to handle even though their rated impendance figure is nothing special.

  2. Have tried various tweaks on my Green and especially liked the "speed resistor tweak" (described in GSP Audio part of Rock Grotto forum) which allowed faster opamps to be swapped in and made Green Solo "faster" and "microscopically precise" (thus the "Racing Green" name).
    Question is - is this type of tweak applicable to SRG? Is SRG already tweaked/prepared to host faster opamps (like my favourite - LM6172 for example) and be even "faster"?

  3. Is there any elegant way to reduce the gain on "Green" (and/or SRG) without compromising it's performance?
    Would like to know this because my favourite sources have relatively high leveled output so that I can barely reach "10 o'clock" on the volume pot.
Thanks in advance for the answers,


Edited by faudrei - 24 May 2009 at 10:03pm
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Charley Phogg View Drop Down
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Points: 108 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Charley Phogg Quote  Post ReplyReply Direct Link To This Post Posted: 25 May 2009 at 2:37am
Originally posted by faudrei faudrei wrote:

Is there any elegant way to reduce the gain on "Green" (and/or SRG) without compromising it's performance?

 Would like to know this because my favourite sources have relatively high leveled output so that I can barely reach "10 o'clock" on the volume pot.Thanks in advance for the answers,


Hi faudrei,


I asked Graham about this in a pm when I first got my Green. Here is  his reply.


"I'd throw the question of gain open to the members.

..... the gain is 6 into a high impedance, falling to 3 into 30 Ohms phones (due to some output resistance dividing the output signal). Such load dependent gain variations being essential for flexibility in use.

I tried to optimize it so that with most sources and headphones the "right" volume is selected between 9 and 3 settings. I treat the volume control differently to that of a power amp - instead of it being optimally parked somewhere between 9 and 11, the Solo's volume control positioning is much more flexible, and within the 9 and 3 positions will still give the same SQ. Because the volume control also acts as gain control in this sense, the amp always has plenty of headroom."

You may quote me on the above, make suggestions or question me on it in the community sections - no problem.

All of this is good feedback and it is gratefully received and often acted upon."

 Keep in mind that is in regard to the "Green"  dated on feb 24th 2008


Edited by Charley Phogg - 25 May 2009 at 2:58am
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