I believe it's a safe bet that your ProSub 60 sub has a Line In that can have a variable LF cut-off switchable in it's signal path for use in non-LFE subwoofer outputs, like the TX-8020. I couldn't find much info on your sub at D.T. or Amazon, other than it's discontinued - sorry. To me, a line level feed is best. You can experiment with it's setting, but I usually just start slightly above it's LF roll-off. To repeat my installation, I have an NHT SuperOne 2.1, sitting on acoustic foam pads, in each corner and, after "sub-crawling" - okay, my crude attempt - I placed my JBL Sub 550P near the RH corner. I'm listening to 'Bonnie Raitt and Friends (2006)' as I write this (CDP = C7030) and it sounds better than I recall it ever sounded on my previous equipment - or my HT set-up. You'll like the TX-8020 - but read the instructions - for example: The 'Auto Standby' feature, which is preset to "ASb On", will shut the receiver off after 30 minutes of inactivity - or low, like background level, use. Just turn it off (pg 19). While you are in 'Setup' mode, choose your speaker impedance (Either 4 Ohms or 6 Ohms or greater). Have fun - and congrats on your rig!
