All times AM.
1:30, Email about subscribed thread.
1:31, Done reading, soldering iron heating up
1:32, Random resistor found, leads trimmed
1:33, Resistor in place, accidentally broke Molex
1:43, Fixed stupid mistakes from 1:33 to 1:43 while fixing Molex
1:44, Fixed Molex
1:45, Started searching for how to send beer to Finland
1:58, Found out I can't ship alcohol from Massachusetts
1:59, Failed at being witty instead
2:08, Gave up on figuring out how to ship alcohol to Finland
2:22, Had a few OCD issues
If you're ever in Boston, drop me a line and I'll buy you a beer.
That totally fixed it, which is unsurprising because running it without those jumpers basically leaves the buffers uncompensated. I'm humbled by your eyes sir.
For future reference to any folks who have been debugging hiss, gain of 3, 3x OPA627's, 3.3ohm output resistors, 110ohm R11's, and no bass boost when built properly has none of it to my ears with AKG K271's.
Things to try when debugging hiss:
- Double check your solder joints
- Check against the schematic
- Swap out R11 for a ~100ohm value
- Swap out the output resistors R24 and R34 for 3.3ohm or 4.7ohm equivalents
- Really check against the schematic
Thanks again. Smart people in these parts