They work perfectly. On each stereo unit, I wired the pins together (pin 1 channel 1 to pin 1 channel 2, pin 2 channel 1 to pin 2 channel 2, and pin 3 channel 1 to pin 3 channel 2)
I hooked an adjustable resister which I had set at 4 ohms to where the speaker would be attached and measured the...