Our current setup involves hooking up the subwoofer to the speaker terminals on the receiver, and then running the satellite off the subwoofer. Without having spent inordinate sums, we have a speaker system of high value and competency. If Cambridge SoundWorks is no longer the company it was, that is unfortunate. However, now we're unclear as to whether the entire system has an impedance of 6, or does each unit (the subwoofer & satellite) have an impedance of 6 ohms, in which case, having them in parallel makes it only 3 ohms. Someone in the family continues to use the almost 20-year old CSW Ensemble with our smaller TV, and the sound is wonderful. These speakers are a Subwoofer-satellite pair that are the following according to the documentation: "Each low-frequency unit/satellite pair operates as a system in parallel with a nominal impedance of 6 ohms." The Luxman has a notice on the back saying that impedance should not be less than 4 ohms, so we'd assumed that we were fine. We have 2 sets of Cambridge SoundWorks Ensemble speakers that we've been using, and had been using for years with no problems, so we're not convinced they're the issue. The Surround for the rear speakers and the larger Cambridge Soundworks center channel speaker. It uses the Ensemble with two satellites and two woofers for the fronts. This is a modified Cambridge Soundworks Ensemble II sub woofer that was about to be thrown away due to age at our town dump. When we asked for help with figuring it out, he told us he'd do it for a fee, so we left and decided to figure it out for ourselves. Im currently using an ancient Cambridge Soundworks Ensemble 'home theater' set up. The repair guy said he just had to replace a couple of fuses, but mentioned that we needed to be sure that our speakers were the correct impedance, otherwise we might have the same thing happen again in the future.
I recently had to take my Luxman R-1040 Receiver in for repair because one of the channels died.