A12 intermittent

[packagebear]

So one of my a12s is on the fritz.

Sometimes it works fine and sometimes it's just dead no signal.

When it's not moving sound. If I grab a mic and run very high spl into it it will open back and then work again.

Any ideas on what to look at? Nothing looks obviously burnt

thanks
kris

[tpryan]

It's almost certainly a bad solder joint somewhere, but you should verify that the op-amp supply voltages are correct and there's no DC on the op-amp output.

[packagebear]

I reflowed just about every solder joint and it seems to be working..

I'm not 100% sure on the supply voltages.. I basically just redid step #33-35 of the assembly guide.. I'm assuming that was what I supposed to do.

Thanks again Tim.

Kris