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USSA-5 Build with Review
USSA-5 Build with Review
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Old 12th June 2018, 12:22 PM   #11
fab is offline fab  Canada
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USSA-5 Build with Review
Thank you Greg for the detailed review!
It is like a banana tree for me!
Fab

Last edited by fab; 12th June 2018 at 12:33 PM.
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Old 12th June 2018, 12:25 PM   #12
fab is offline fab  Canada
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Quote:
Originally Posted by xrk971 View Post
Thanks for sharing you awesome looking build. Nice work! Also, thanks for detailed listening impressions. Both Zman and myself have been collecting the parts for the USSA5, and it's a small ransom in parts cost when one goes with the specified parts in the BOM, so I am glad it worked out. You may be the first on DIYA outside of Canada that has built and posted on this foru.
Congratulations, and happy listening!
Cheers,
X

Hi X
In fact there has been more USSA-5 and USSA-3 amplifiers built outside Canada so far. In Denmark and several ones in France too.
See HH and Project16 reviews:
Post your Solid State pics here.

Post your Solid State pics here.

Post your Solid State pics here.

Fab

Last edited by fab; 12th June 2018 at 12:32 PM.
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Old 12th June 2018, 02:31 PM   #13
fab is offline fab  Canada
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USSA-5 Build with Review
Clarification about the pcb layout : version 0.1 of pcb was done by Alex but subsequent versions to 0.4 was done by Project16.
Alex had gently given me the right to use its original layout source files.

Fab
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Old 12th June 2018, 02:42 PM   #14
xrk971 is offline xrk971  United States
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Quote:
Originally Posted by fab View Post
Hi X
In fact there has been more USSA-5 and USSA-3 amplifiers built outside Canada so far. In Denmark and several ones in France too.
See HH and Project16 reviews:
Post your Solid State pics here.

Post your Solid State pics here.

Post your Solid State pics here.

Fab
Thanks for the clarification, I knew Project16 had built it but forgot. Good to see the amp getting some coverage and hopefully more people will try it out. I am close to building it, as I said, I have the boards and all the special actives including the Toshiba 2SK2013/2SJ313 matched quads.
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Old 12th June 2018, 04:08 PM   #15
Samuel Jayaraj is offline Samuel Jayaraj  India
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Thank you Greg for your amazing review of a very fine build of a very well engineered amp, USSA5. It's highly motivating to read such a good review.

Fab, how does one get the schematic, instructions and board? I have 2 pairs of Alfet 16xx parts, enough 2SK/2SJ Toshiba laterals, torroids, regulated supply which I use with ClassA amps, heatsinks, cabinets and pretty much everything else.

Thank you in advance, Fab.
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Old 12th June 2018, 04:22 PM   #16
HH is online now HH  Europe
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I have built the USSA-5 and the USSA-3 and I hold both amplifiers in very high regard, as can be seen from my reviews above.

Both reviews were written when the amps were quite new, but my appreciation hasn't faded at all. I still hold a preference toward the USSA-3, but the USSA-5 is still an amazing amplifier.

The designs of Fab deserves much wider recognition.

Last edited by HH; 12th June 2018 at 04:27 PM.
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Old 12th June 2018, 04:26 PM   #17
Samuel Jayaraj is offline Samuel Jayaraj  India
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And why the preference for USSA3, if one might ask? Thanks.
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Old 12th June 2018, 05:26 PM   #18
HH is online now HH  Europe
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Quote:
Originally Posted by Samuel Jayaraj View Post
And why the preference for USSA3, if one might ask? Thanks.
Both amplifiers are really excellent, and I could be perfectly happy with the USSA-5. It delivers genuine high-end performance. It has a huge and detailed sound stage combined with good pace and drive. But I think my USSA-3 has a sonic richness of tone, that is very well suited to my preference for acoustic instruments. The difference is not like night and day though, and you migh prefer the USSA-5. Just like many First Watt fans might prefer the F6 to the M2.

Last edited by HH; 12th June 2018 at 05:37 PM.
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Old 12th June 2018, 06:05 PM   #19
Samuel Jayaraj is offline Samuel Jayaraj  India
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Thank you for the clarification and comparison. But I gather that the USSA-3 has a relatively loose bottom end compared to USSA-5. I know it will depend on the Qtc of the speaker system. I use Fostex FE168Sigmas in QTL enclosures. I have tried the M2 output stage and an F7 clone. Both sound fantastic with the F7 clone having a slight edge in terms of transparency.

Nevertheless, the USSAs from Fab sound like good builds to compare. So how do I get plans?
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Old 12th June 2018, 08:57 PM   #20
xrk971 is offline xrk971  United States
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You need to go here:

USSA 5 build and questions

Sign up as a member and Fab will send you plans and instructions via email/pm’s.

Oh, and learn to read in French or use Google translate.
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