How do you turn on the subwoofer output on my headset?

Question

I have a sony xplod 52 x 4 headset it' kinda old, but I hooked up my two amps and everything is hooked up right but no sound is coming out. and I lost the owners manual to it so I don't know how to turn on the subwoofer output, can someone tell me how to turn it on?

Answer 1

I thought you wanted me to tell you how I turn it on?

Answer 2

it sucks when you loose instructions