preamp with single supply

[ergulburunsuz]

hello everyone

I am making a portable, battery powered audio system. There is a balanced preamp at the input, then a buffer stage, then the signal line is split into two, one line has an hpf filter, the other has an lpf filter, then it goes to the power amplifier. The circuit is stereo and I am using a total of 8 ne5532s, and a simple two resistor voltage divider for bias. My question is; Should I bias the 8 opamps using separate resistors or can I have a common bias for all of them?

 

[rayma]

For battery power use just one bias divider to minimize wasted current.
Bypass that node to ground with at least 10uF.

 

[ergulburunsuz]

@rayma

Thank you very much for your answer. So, is there any disadvantage of using a single bias in terms of noise, crosstalk, etc.?

 

[rayma]

Just use enough uF for bypass. Can you post the schematic?
What kind of batteries?

 

[fubar3]

Use TLE2426 to produce the reference bias. Or if you have resistive divider use a unity opamp buffer.