12v single supply subwoofer preamp

[AndrewT]

then you have not drawn what you have built.
Post 6 shows dual polarity opamps fed with single polarity power.

OOPS,
there is Vb at the bottom of R9.
That is the half supply.
Looks like the 1/2 supply ripples through to the output opamp.

Check your voltages.

 

[patnaik_kottakki]

then you have not drawn what you have built.
Post 6 shows dual polarity opamps fed with single polarity power.

OOPS,
there is Vb at the bottom of R9.
That is the half supply.
Looks like the 1/2 supply ripples through to the output opamp.

Check your voltages.

power supply is also good. there is no half voltage at the output( without signal input)

 

[AndrewT]

check your voltages all the way through from input to output.
Just the output DC after the AC coupling capacitor tells you next to nothing.

 

[Surya2k]

In post 6 schematic, can I remove C12 and R10, and replace them with 10k to ground. And R9 33k instead of 47k. adding 2A333K cap in parallel to R11. Remaining same as it is. Please give some advice. Thank u.

 

[Surya2k]

can somebody please give schematics or PCB layout of complete subwoofer amp including high pass and lowpass. I am trying to built one for my PC.

 

[AndrewT]

In post 6 schematic, can I remove C12 and R10, and replace them with 10k to ground. And R9 33k instead of 47k. adding 2A333K cap in parallel to R11. Remaining same as it is. Please give some advice. Thank u.

post8 tells you post6 does not work !

 

[AndrewT]

This was kindly given in another Thread.
http://electro.uv.es/asignaturas/ea2/archivos/sloa058.pdf