How do I wire this up

[Arcanekitten]

Hello,

 

I've got a small headache because I don't know how to wire my speaker setup up. 

 

This is the current situation. I've got a PC 3.5mm to RCA that goes into my old receiver/amp that amp outputs via speaker wire to two small speakers. Now have I been missing some low end so I want to add a subwoofer and I have got this denon Subwoofer. How would I add this sub since it has a line level input, high level output and high level input. It has a amp built into it. The model number is the Denon DSW 80 and the old amp/receiver is the Pioneer RX-Z71L.

 

Can I route a set of speaker wire from the output from my old amp to the sub high level input or would one or both of the amps then explode?

 

I would prefer if the old amp stays in the loop since it has easy to access volume and eq settings.

[circeseye]

you can take and use a splitter off one of the channels from the pioneer and run it to the high level input. just dont connect it to the line level (thats for low power)

[aless83]

Check if your amp has TAPE out output