Coupling Cap Between Stages question

[juan_felt]

Hi!

I am building a distortion, and I added an active baxandall to a throttle box instead of the tone and mids controls. Here is the part of the schematic where the baxandall and outputs are.



Vref is at the input and there are no coupling caps until after this block.
My question is, after C12, do I need to add Vref again to the last opamp, or should I remove this cap and not add Vref at all?

As always, thank you! J

[EBK]

I'll give two short answers:
1. Your op amp input has to fit within its operating range, so yes, it needs a DC offset.
2.  Why are you adding that last buffer?  You already have a low impedance output from the previous op amp.

[juan_felt]

I'll give two short answers:
1. Your op amp input has to fit within its operating range, so yes, it needs a DC offset.
2.  Why are you adding that last buffer?  You already have a low impedance output from the previous op amp.

Hi EBK, thanks for you reply.

So, in order to correct the things you pointed out, should I remove C12 and IC3 and connect pin 7 from IC2 to R17?

Again, than you!

Enviado desde mi Nexus 6P mediante Tapatalk

[EBK]

So, in order to correct the things you pointed out, should I remove C12 and IC3 and connect pin 7 from IC2 to R17?

Yes

[juan_felt]

So, in order to correct the things you pointed out, should I remove C12 and IC3 and connect pin 7 from IC2 to R17?

Yes

Cool, thanks!