Does anyone have any experience with CAPIs 2-stage Line amp boards? I can't find schematics so it's difficult to figure out what's going on.
I am attempting to build a 4 channel mixer using 4* 2 stage line amps and an ACA summing board using CA-0252-DIY Rev A opamps.
When I put a balanced signal on the input, I do not see the -6db drop I am expecting on the stage 1 output. The (+) to (-) input has the same magnitude a the (+) to (gnd) output.
If I send stage 1 into stage 2 then I'm seeing a ton of gain after stage 2. Getting the same results on all 4 boards.
I was expecting unity input to output. Am I missing something here?
Is the -6db drop supposed to be off-board somewhere in the original mixer circuit?
I plan on running a fader and a couple AUX sends between the two stages so the stage one boost might actually be nice before the fader but I'm still a little confused. Panning will be post stage 2.
CA-0252-DIY Rev A opamps don't use the ground pin seen on some 2520 footprints/pinouts. Could this effect compatibility with the circuit?
Any advice is greatly appreciated.
Thanks,
-Stacy
I am attempting to build a 4 channel mixer using 4* 2 stage line amps and an ACA summing board using CA-0252-DIY Rev A opamps.
When I put a balanced signal on the input, I do not see the -6db drop I am expecting on the stage 1 output. The (+) to (-) input has the same magnitude a the (+) to (gnd) output.
If I send stage 1 into stage 2 then I'm seeing a ton of gain after stage 2. Getting the same results on all 4 boards.
I was expecting unity input to output. Am I missing something here?
Is the -6db drop supposed to be off-board somewhere in the original mixer circuit?
I plan on running a fader and a couple AUX sends between the two stages so the stage one boost might actually be nice before the fader but I'm still a little confused. Panning will be post stage 2.
CA-0252-DIY Rev A opamps don't use the ground pin seen on some 2520 footprints/pinouts. Could this effect compatibility with the circuit?
Any advice is greatly appreciated.
Thanks,
-Stacy