I will be using a reasonably good model Pioneer receiver (VSX-1015TX), but when I sent the Pioneer Tech Center an e-mail outlining my situation, I got a strong response saying that it would not work - the lower impedance would cause the amplifier to shut down; typical conservative answer you might expect from the factory. When I later called Pioneer to ask a different question, I asked the fellow on the phone his opinion. At first, he was pretty negative, but after I gave him some more details, he softened his concerns and agreed that paralleling the surrounds would likely be okay if the speakers were reasonbly sensitive. He also suggested I consider putting the speakers in series (180 deg out of phase) as this would eliminate any concerns about taxing the amplifier. Instinctively, this does not feel right, but it might be worth a try, if my parallel setup does not play well.
