Originally Posted by RPGWiZaRD
No idea, I've never even went as high as 25% on the ZO2.3 even. You might have needed this ZO2.1 version though as it provides a bit higher gain than ZO2.3, at 15-16% it's roughly as loud as ZO2.3 at 19%. Well I could give this a try... use ZO2.3 and lower the foobar2000 volume so I could test with 25%+ volume (otherwise higher than 20% becomes too loud for my liking). Well maybe we have different Realtek chips, I have ALC889 myself which is pretty good for onboard.
EDIT: Well I tried with 30% source volume and lowered foobar2000 volume a little and even shortly raised the volume level to check how it behaved with the louder output too and didn't hear any distortion at all. Weird, maybe you got a defect unit... But I sure hope that's not your normal listening volume levels. xD Did you plug it the right way too? The Headphones to the speaker icon output and source to the "musical note" icon output jack?
Here's another thing to try... the M-Audio Q40 have replacable cable... try plugging in with the short mini stereo cable between amp and headphone just in case there's some incompabilities with the Q40 headphone cable with the ZO2 jacks... at least for me the jacks are "sinked" in and doesn't make proper contact with Q40 stock cable for the ZO2s I have but I think that was fixed later on though.
Appreciate your tips, testing, and advice! After some further testing I dropped it off at the shipping center for return. Must be a defective unit. I tested the ZO2 in high gain mode with both my Clip Zip and my home theater... same results as mentioned previously. Just for fun I tried hooking it up backwards with the headphone into the "note" and the source into the "speaker". This resulted in silence.
I just checked my Amazon order and found that the order was fulfilled by DBRoth and not Digizoid... ???
Edit: Your running a better Realtek chip. I have the ACL888.
Edited by opinicus - 3/16/12 at 3:33pm