I just run an alligator clip from the ground of another amp that uses all three prongs and clip it to the barrel connector of my nutube amp. But that wouldn't fly in an office environment...haha. The round slot would be good enough if you re-purposed a power cord and made sure to insulate hot...

I've had luck attaching the circuit ground to my outlet's ground (don't try this unless you're confident you know what you're doing). Also changing the physical placement of the amp can make a big difference. An old girlfriend left one of those yoga foam block things at my place and it's...

I came up with an air-isolated shock-mount using an 18650 battery case. There are a couple of young kids above my place and when they stomp overhead it's enough get the nutube resonating. The only time I notice any ringing now is when I change the stepped attenuator setting with my most...

Ha, I've done the same. Did sound good, but it may be because I'm coming back to a warm amp after a rough day at work. haha.

Interesting module. Datasheet mentions unity gain stability issues and output current isn't as high as the OPA551, so wonder if you'd run into issues with harder to drive HPs and higher volumes. I haven't tried rolling myself as the OPA551s seem to be great performers, but keep us up to date...

577002B00000G. Any std package with 0.25" fin height or less should work. Might be able to pull off up to ~0.40" if mounted backward (pointed away from the 1/4 jack). I have a few in that range in my cart for whenever I pull the trigger on another digikey order. Even with the small heatsink...

Interesting PS observations, Evgeni. I got some promising results with another method. I was trouble-shooting some noisy Russian tubes on my project amber amp and found that my noise problems went away when I ran a ground wire from my mains line to the negative out from the switching regulator...

Build looks awesome, nice job. Glad it's working out for you. Not sure about a plastic lid. Data sheet seems to suggest that isolation from the air (no slits) can be better for microphonics (I smacked a fruit fly ~10ft away and it started ringing...haha). But the regulator does get toasty...

Hope this works...Pete's multi-pot footprint is excellent for hacking a ground connection. I had to file a small notch into the inside of the case to clear the wire.

Awesome! When you're slinging it together I'd recommend soldering a wire into one of your ground connections you can use to ground the body of your pot.

This amp is able to drive all my low and high impedance headphones with ease. But if they're highly efficient you may experience some background hiss/noise and have trouble getting volume settings that aren't too loud. But an attenuation cable can be built easily enough or purchased relatively...

HiGHFLYiN9 is correct, I can confirm it's a grounding issue. I also have the TKD pot (with a large plastic, pseudo metallic knob). It used to buzz very loudly when I touched it. Also picked up A LOT of noise from nearby devices. The noise was so bad the amp was unusable. Soldered a wire...

Does anyone have overlayed measurements of modified M1060s with LCD-2s or LCD-3s?

Had my M1060s for a few weeks now, thought I'd add some impressions (though they're similar to what others have already been mentioned). Right out of the box these things have flaws, but are still impressive. Sound signature reminds me a little bit of the ATH-M50x, except more revealing mids...