On Jun 2, 10:36 pm, "Soundhaspriority" wrote:
No (sorry.) If there are two pairs, and you want to use them
simultaneously, and this is a mass-market HT receiver, then the impedances
must be 8 ohms.
In case you want to know why, this is how it goes. Two speakers in parallel
have half the impedance of one. Two 8 ohm speakers = 4 ohms. Two 6 ohm
speakers = 3 ohms. Two 4 ohm speakers = 2 ohms.
The lower the impedance presented to the amplifier, the more the output
transistors will heat. If the impedance is too low, it will either kill it
slowly by excessive heat, or fast, by "thermal runaway." This last is the
solid state equivalent of nuclear explosion 
That's a very nice explanation. Makes a lot of sense. I assume
anything that's not custom made, but made and sold in bulk is a mass-
market HT receiver. I am wondering if I am already on the wrong
track. I think the receiver is rated 8 ohms and the pair of speakers
that I am using are rated 4 ohms. It's been like that for several
months without any deterioration in sound quality that I can tell. In
fact, I recently replaced the 16 gauge wires with 14 gauges, and think
they sounded better than ever.