The reason I asked about gain, I'm finding with the AMB Gamma1 DAC and Mini3 with 6XX I'm only at maybe 9-10 o'clock and its loud enough. By default I believe the Mini3 has a 5x gain (14 db) which is same as Whammy. Mini3 uses a 10k pot and for the Whammy I was planning on a 50k.

Putting together the BOM has been tricky, but I ordered the Whammy PCB. Some substitutions on parts, but I think I'll have what I need. Going with a 18V 25VA transformer as the 22V ones are NA. Picked up a few op-amps to try out: LM833N, OPA2107AP, AD746JNZ and the stock RC4580IP. What gain...

I saw you posts regarding the Whammy... sounds like their all good. I think I've settled on the Whammy. Looks like the ACP+ would be a better preamp. Though I'm not fully up on the benefits, but having input/output selections and master volume would be nice. Any suggestions on Whammy and...

Did you roll op-amps? I'll be building myself... since i enjoy. Parts are only <$200.

Are you still selling yours? Sound flat with HD800s, as in bad or boring? Comparable to any other amps you've run?

I'm also throwing the idea of Ananda if it's a worthy upgrade from the Sundara... or hold off till I'm ready for an Arya (if ever).

IIRC, I bought the 580s used and they already had the black metal grills like (center vs. right) I don't know the difference in sound, since I never had the original plastic "z" grills. Now the baffle or structure holding the driver, I don't remember...

Is that the route you took, kit? Did you go open or closed loop? Standard bias? I think this and Whammy are in the running...

US Never did any tuning, EQ if that's what your referring to.

Interesting, never heard of them... Chi-Fi? Sources for them, besides possible Ali?

Considering building this as well... coming from CMOY>Mini3>SSMH>SOHAII This and the RJM Sapphire are at the top of my list. What you driving with the Whammy?

I sold off my HD580s (HD600 grills and HD650 cables) as I hadn't been using them too much the past few years (other priorities and hobbies)... plus they had some issues (cracked headband and intermittent connection). Now, I'm interested in getting back into it... so the question is any...

Did you build the latest Sapphire (discrete) or the earlier with op-amp? Looking the latest build spreadsheet, it notes matching is not necessary but does help. Biasing with a trimmer is no problem, but I see drift is noted. Whereas the Whammy, I believe, is self-biasing. Can you describe...

Thanks O2 - I'm thinking this isn't really a step up from what I have MilletMax - already have a few Millet products Whammy - Nelson Pass, his "personal" headphone amp design M3 - AMB was highly regarded in the day, natural evolution from Mini3 Beta22 (2-channel) - same as above, just another...

I like to DIY, back then you could build an amp for less than a commercial equivalent. Besides the ability to change things yourself and the satisfaction of building something. Nowadays, browsing this forum, diyAudio and Reddit I'm mostly seeing references to off the shelf, CI-FI stuff...