[nullstring]

built my first cmoy today...

plugged it in and.. I am experiencing almost no volume on the Left.

I checked the voltages and V- is -2V and V+ is 6V

you guys have any idea whats wrong with it?

the impedance of the ear buds seem to be 30ohms

The only thing I see wrong (maybe) is that I have a solder bridge between the first and second rows. The rows are jumpered.. so I ignored it and figured it'd be fine.. but maybe I'm wrong?

 

[nullstring]

Ok, so, I replaced the opamp with an OPA2132.. and now it works fine

the voltage changing is still there (and even worse now) but it sounds fine.

now, why is it that the TS922 that was in there didn't function correctly?

I had it in there for testing.. because I got it for free and I have two of them

 

[Pars]

The lower the impedance of the phones, the worst the voltage imbalance will be. Read Tangent's article Virtual Ground Circuits to help understand why, and some things you can do about it

 

[roggom]

Sijosae has/had some great VG circuits, I use the buffered type. No nonsense 4 caps 3 resistors and an opamp. http://www.headphoneamp.co.kr/bbs/zb...esc=asc&no=179

Anyone know what happened to Sijosae, he dropped off the radar in 2006.