Hello,   I just purchased a pair of Boston Acoustics E60 speakers, and am considering upgrading my amp. I currently have Sony STR-DH100, probably one of the cheapest receivers you can find. I got it even cheaper ($25) used, and I don't feel attached to it on emotional level. My budget is...

I purchased the Sony STR-DH100 receiver for my Dad for Christmas and he wants to hook up a Sub but there arent any pre-outs or line-in on the back of this receiver, is there any way to wire a Sony SA-W2500 sub to this receiver? Thank you!