20db mic pre

zmgwg said:

there are few situations where I need 10 to 20db mic pre gain [also no color needed]
Did anyone tired hooking up like a 1:7 or 1:10 mic input transformer only. for a 20db gain
would there be any problem with output impedance?

Click to expand...

There might be, but almost certainly the problem will be with input impedance.

What are you trying to drive -- in other words, what's the input that needs to have its signal boosted? If it's a standard preamp with an input impedance around 2k, then if a 1:10 tramsfpr,er feeds it then the microphone will see a load of 2000 divided by the square of the turns ratio. That would be 2000/100 = 20 ohms, and very few mics would be happy driving that.

Peace,
Paul

> What are you trying to drive -- If it's a standard preamp

As I understood the OP, it was Line Input. He'd run out of preamps.

Of course another path is to blow $99 for a cheap or used 8-mic-in box. Small mixer or an ADC box with line outputs.