After a full recap of the Sansui 661 receiver, It would be nice to compare it to my also fully recapped Marantz 2016 receiver using the same set of speakers. Unfortunately, swapping wires is not as easy as it sounds if you have to deal with pulling gear from the entertainment center and messing with tons of wires. After you are done, you completely forgot how does the first piece sounds like. So I have decided to build a simple amplifier switcher. It is not a new idea and basically, it is a sort of reversed speaker switch box.The main piece in this switch box is a 4PDT heavy duty switch with on-off-on positions. You definitely do want on-off-on so there is no chance that two receivers will be connected to the same set of speakers even for a split second. Who knows what’s going to happen.
So the list of parts is:
1. Small aluminum or plastic box (choose plastic if your speaker binding posts are not insulated)
2. 6 pairs of speaker binding posts (total of 6 red and 6 black)
3. 4PDT on-off-on switch
4. Speaker wire
The idea here is to have speaker outs from receiver connected to the switch box and from there wires goes to one set of speakers. All controlled by the 4PDT switch. Here are the pictures of the build. If there are any requests, I will post a wiring schematic but it is pretty self explanatory. The middle binding posts go to the speakers and left/right posts go to receivers.
Aluminum box with holes drilled:
Speaker binding posts and 4PDT switch:
Parts installed in the box:
Complete switch box: