I have the upgraded pot as well and grounded it as well, it hisses at the very bottom and crackles at the very top. I don't get distortion when tuning, though (I used all the recommended upgraded parts on the BOM/site). The amp is hyper-sensitive to any jostling, though. I put EARs on it, which...

I have a friend that gave me an elma 04A2R00 attenuator (without the resistors) and I want to use it to make a passive attenuator and 2:2 switch like the JDS OL Switcher. Can any of you point me in the right direction on how to create something like that and what resistor values I should use?

Well, I accidentally left my NuHybrid on all day while I was at work and came home to listen to some music tonight. It sounds amazing having been on all day. I imagine that isn't the best idea, but the difference is noticeable!

It uses two TI OPA551PAs (http://www.mouser.com/ProductDetail/Texas-Instruments/OPA551PA/?qs=wgAEGBTxy7kLauCnM%2btIHQ==). They are singles.

Can you send a link to the linear supply you bought?

Got a part number for your heatsink?

Has anyone tried out the DIY USB DAC kits on ebay with the SMD parts already soldered? http://www.ebay.com/bhp/usb-dac-diy?rmvSB=true I was thinking of buying one, but I don't know which to get...

I just tried the NuHybrid out with my Grado SR60i phones. Sounds great!!! Now, I want to put a clear plastic lid on the setup with some slits for air to get in. Can anyone recommend a place to get a plastic lid for the box Pete suggested?

Here is the full gallery from last night!

As promised, here are the progress pics! And there you go. I don't have the right headphone connector to test it at home, so I'll let everyone know how it sounds tomorrow. I highlighted hav2uo4's pot ground wire and the EARs. Hope they make it sing!

Can someone recommend a knob for the TKD 2CP601-10K?

I am interested in making a DIY DAC in the sub-$200 price range that is powered with a wall wart instead of through the USB port. I like the PupDAC, but think I'd need a DoodleBug to make it shine. I've been looking online for powered DIY USB DACs, but haven't had much luck. This is going to...

Thanks everyone. I am going with the JDS Labs OL DAC with the DIP switch installed.

Can you share a picture of how you did this? I read your description, but can't quite picture it in my head.

Got the upgraded pot and the EARs. Now I'm ready to go!