I have a pioneer SX-7, i want to know what everyone thinks about this receiver. Is it good/bad/ok? Also i was wondering if i could hook up a sub to it. I thought that i might be able to route a sub through the tape rec RCA outputs. Right now i have 2 bose interaudio 6000s running on it but i have 2 1977 bose 301s that i would rather run but they dont produce good enough low feq.