I just got my Darkvoice 336SE from Massdrop yesterday.   I had to open it up and fix a disconnected solder joint at the headphone jack's ground.  It's working great now, but unfortunately I failed to pay attention to the orientation of the bottom panel.  Could someone please look at the...

220mA should be enough. The BOM even suggested a 12vAC 200mA power supply.  That's what I use on the O2s I built, and I've never experienced any explosions :D.   That having been said, I guess it wouldn't hurt to increase his headroom a little bit.  JDS labs uses a 15vAC 500mA supply.  The O2...

Does your ican power supply output DC voltage? The O2 need an AC power supply.

RevA had compatibility problems with a very small percentage of motherboards. Its power regulation would become unstable and cause severe distortion. RevB was made to fix this problem. If you don't have this problem, there is no reason to replace your odac. Even if you have the problem, it can...

What's your O2+ODAC's configuration?  Does it have the separate line out from the ODAC in the back or does the O2's line-in do double duty as input and output?   If it has separate line in and line out, the O2 should disconnect the ODAC when you plug a cable into the line-in jack.  Just...

There should be a usb port on the back of the unit.  If there is no usb port, then there is either no odac.... or they accidentally installed a rear plate with no cutout for the usb port.

That little wire loop is just for connecting the amp's ground to the case in order to help reduce the chances of electrical noise.  I don't see how it could affect connectivity with the headphones and/or input jack.  The most likely scenario is that the cheapo jacks on the O2 are worn out.  This...

9 years ago, I painted my HD580's headband and grills.  It looked cool back then.     Today, not so much lol

AKG K701 - I bought this twice! That damn soundstage kept tempting me.  But there wasssss alwayssss sssssomething about it that didn't agree with my earsssssss.   Jecklin Floats Model II - I keep it more for amusement than for actually listening to music.

My HD580, which was already old when I bought it used 9 years ago.  It's probably closing in on 20 years old.  I did replace the drivers with HD650 drivers though.  The original drivers suffered from soft springs on their cable connections which constantly caused the audio to cut out...

I think the phone refuses to power the DAC if it asks for more current than what the phone's software allows.  Using the hub tricks the phone into providing power.  There is an article offering a more detailed explanation at JDS Labs http://blog.jdslabs.com/?p=838

    It works when I do Phone > OTG adapter > USB cable > USB hub > USB cable > ODAC A direct connection from Phone > OTG adapter > USB cable > ODAC does not work for me. This is not the case for all DACs.  I also have a y1 DAC, and it works perfectly well on my phone without having to...

It doesn't work when I hook it up directly to my Android phone (the Oneplus One), but it works if I connect it to the phone via a USB hub.  The phone provides power to both the hub & DAC.  I don't need to use a separate power source.

I just built myself an O2 with ODAC rev B, and I'm very happy with it.  It's just as capable of powering my HD600 as my M^3, but at the same time, it can also run IEMs with a totally quiet background.  I really appreciate its very neutral presentation.  The O2+ODAC simply takes a recording and...

And the truth comes in such a small package.  It's a much better match for my Intel NUC than the M^3, which is gigantic in comparison.   I painted my HD580 before.  I thought it looked awesome (see my sig).  However, time has been unkind lol.  I think it's time for me to buy HD600 headband...