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Bought one to evaluate and then quickly another to power my 97dB-sensitive Serenity Acoustics Super-7s.With Nelson Pass's approval, I wired the 2 channels in each amp in parallel; max. power went from 30WPC into 8 and 15WPC into 4 to 30 Watts into 8 and 60 into 4. Have added highest-quality powersupply-bypass caps--BlackGate FK 2200/35s and SoniCap 0.47uF Platinums--on the boards as close to the output transistors as possible...
The BGs are visible hanging from the board but the Platinums are farther 'back' and not visible.The longer I listen, the more convinced I am that this amp-and-speaker combination is the best I've ever had, and the amps I've had include WAVAC MD-805m and Coincident Frankenstein II SETs. This combination is VERY musical, full range*, and resolving.
I'm THRILLED.
* with response well into the bottom octave with their powered woofers
Edits: 12/23/14 12/24/14
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Topic - First Watt J2 single-ended, Class-A, all-J-FET amps - jeffreybehr 16:58:25 12/23/14 (37)
- RE: First Watt J2 single-ended, Class-A, all-J-FET amps - AbeCollins 08:46:52 12/26/14 (4)
- RE: First Watt J2 single-ended, Class-A, all-J-FET amps - bare 19:42:28 09/28/16 (2)
- Reading this months after it was written... - jeffreybehr 15:26:20 03/06/17 (1)
- RE: Reading this months after it was written... - coolhand28 17:48:08 03/06/17 (0)
- TYVM, Abe. (NT) - jeffreybehr 10:31:29 12/26/14 (0)
- RE: First Watt J2 single-ended, Class-A, all-J-FET amps - Ric Schultz 13:53:03 12/25/14 (17)
- It would be interesting to hear what Nelson Pass might say... - genungo 02:12:03 12/26/14 (14)
- RE: It would be interesting to hear what Nelson Pass might say... - Ric Schultz 19:09:41 12/26/14 (2)
- RE: Your own class A amps - genungo 07:37:21 12/27/14 (0)
- Two things - 1973shovel 06:05:12 12/27/14 (0)
- Pass does participate in the DIY Audio Pass Labs forum. - jeffreybehr 10:26:49 12/26/14 (10)
- RE: Pass does participate in the DIY Audio Pass Labs forum. - A.Wayne 10:39:29 12/26/14 (9)
- RE: Pass does participate in the DIY Audio Pass Labs forum. - morricab 01:16:38 12/29/14 (8)
- Who is 'him'? We were discussing Nelson Pass. - jeffreybehr 21:09:30 12/30/14 (0)
- RE: Morri Please up the meds ... - A.Wayne 13:56:50 12/29/14 (6)
- Paralleled, Mr. Wayne, paralleled, not bridged. - jeffreybehr 21:12:08 12/30/14 (5)
- RE: Paralleled, Mr. Wayne, paralleled, not bridged. - cin5 17:09:03 09/27/16 (3)
- I've never heard ANY Pass Labs amps AFAIK. - jeffreybehr 17:18:30 09/30/16 (2)
- RE: I've never heard ANY Pass Labs amps AFAIK. - fantja 16:00:19 10/02/16 (0)
- RE: I've never heard ANY Pass Labs amps AFAIK. - fantja 05:30:46 10/01/16 (0)
- RE: Paralleled, Mr. Wayne, paralleled, not bridged. - A.Wayne 22:00:00 12/30/14 (0)
- Thx for the further suggestions. I'm sure I'll do at least... - jeffreybehr 23:55:05 12/25/14 (0)
- RE: First Watt J2 single-ended, Class-A, all-J-FET amps - fantja 17:47:27 12/25/14 (0)
- RE: First Watt J2 single-ended, Class-A, all-J-FET amps - A.Wayne 12:24:06 12/25/14 (1)
- Speaker sensitivity is 97dB broadband. (NT) - jeffreybehr 23:49:46 12/25/14 (0)
- As one First Watt owner to another - 1973shovel 09:34:25 12/25/14 (7)
- Pass didn't bless my improvements project... - jeffreybehr 23:48:41 12/25/14 (6)
- RE: Pass didn't bless my improvements project... - pictureguy 23:16:24 12/30/14 (0)
- Ahh, I see - 1973shovel 06:23:52 12/27/14 (0)
- RE: Pass didn't bless my improvements project... - Ric Schultz 20:51:15 12/26/14 (3)
- Yup, but the Mills MRA-12s to be installed aren't magnetic. :-) (NT) - jeffreybehr 21:56:37 12/26/14 (2)
- RE: Yup, but the Mills MRA-12s to be installed aren't magnetic. :-) (NT) - Ric Schultz 23:53:58 12/26/14 (1)
- RE: Yup, but the Mills MRA-12s to be installed aren't magnetic. :-) (NT) - fantja 03:51:43 12/27/14 (0)
- RE: First Watt J2 single-ended, Class-A, all-J-FET amps - fantja 04:55:02 12/24/14 (3)
- TYVM for your kind words. I bought the J2s in late October... - jeffreybehr 11:54:47 12/24/14 (2)
- RE: TYVM for your kind words. I bought the J2s in late October... - fantja 12:20:20 12/24/14 (1)
- Main powercords are DIY, all from Sonic Craft--Neotec UPOCC wire... - jeffreybehr 15:56:05 12/24/14 (0)