I ran out of goes intas and goes outas on my old Marantz 2230 so I picked up an Adcom GFP-565 preamp that has a couple more inputs. Right now it is hooked up to a 40 year old Amber Series 70 amp. It sounds really good. Maybe better than the Marantz which is considered one of the better old low power solid state integrated amps. I have a couple of the Ambers, and I would like to run them both in mono mode, but I'm afraid I'll trip a circuit breaker as there is already a bunch of stuff running off that poor little 15 amp circuit.
Somebody drives by sometimes with their subwoofer on wheels. We are 1/2 mile from the road. It doesn't matter what frequency goes in that thing. Only the fundamental of that shite comes out, LOL.