I'm not an audio guy, so sorry if this is a simple/not possible question. My father-in-law has 4 speakers in his garage powered by an old stereo receiver that just bit the dust via its power supply. I grabbed an old Fisher RS-853 for $10 at my neighbours garage sale on the weekend hoping it would just be a drop in replacement for the one that stopped working. Upon closer inspection, although it has terminals for 4 speakers, they are grouped into A and B with only one set able to be active at the same time. The speakers are 100W each, two are 8-ohm and two are 6-ohm. When I check them with my meter, they read 6.2 ohms and 5.2 ohms respectively.
What's the best way (if any) to run all 4 speakers simultaneously off of the stereo receiver? I was going to remove the board with the four sets of terminals and just solder on a jumper, effectively making them all "Group A" but I recall there being issues running speakers of difference impedance (Parallel vs. Series) and don't want to damage anything. He's not going to blast the thing. Hoping to see if I could get some input from you fine folks.
Thoughts?
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