8- channel mixer.

[markian80@yahoo.com]

i'm designing an 8-channel audio mixer and i'm still at the intial stages of
designing the input amplifier circuits.i'm looking at a microphone and a guitar as my main inputs.
I need help on designing a dyamic microphone pre amplifier.this should be a low noise amplifier circuit.
I'm also wondering if the microphone preamplifier will work for all other inputs,
so i can just duplicate them 8 times.

 

[Nigel Goodwin]

The mike input should be balanced, and suitable for 600 ohm (or so) microphones, usually using an XLR connector. For a line input it's normal to have a mono jack socket, and the switch on this disconnects the first microphone stage and goes in at a higher level.

A passive guitar really requires a higher impedance though, and it's normal to have a specific guitar input - with around 1mohm input impedance.

You might try having a look at **broken link removed** or **broken link removed**.