4 channel mixer circuit?

[Adnancoskun]

Hello everybody;
Scheme of four-channel low-noise mixer incorrectly suggest to me here?

coskun_adnan@yahoo.com
adnancoskun1413@hotmail.com

 

[AndrewT]

I see a question mark
What is the question?

 

[Adnancoskun]

Dear Andrew,
I mean, i need a circuit of 4 channel mixer. But i have many scheme, but all of them is noisy,,, i need a qualified scheme, is there someone , help me... 🙂

 

[Osvaldo de Banfield]

A single op amp working a summing inverting amplifier is the simplest way to do this job.

 

[Adnancoskun]

Thanks Osvaldo,
ofcourse, i have do with TL071, but there is noisy, i need little qualified..

 

[Osvaldo de Banfield]

SS or tube?

 

[Adnancoskun]

i need S.S,, becouse i can not find Tube and i have not got place in the box for with Tube mixing..

 

[AndrewT]

A single op amp working a summing inverting amplifier is the simplest way to do this job.

This is the simplest.

 

[demeterart]

unless you need mic amplification and very large output even an LM741 will do the job. The TL071 is certainly more than adequate. Why don't you go for the classic audio NE5534 ?
Remember that "noisy" as you describe it i guess implies pcb and wiring/grounding problems. I seriously doubt that the TL071 failed to do the job.
take care...

 

[Speedskater]

For projects like this, Rod Elliott is a good starting point:

Elliott Sound Products
DIY Audio Articles