Thanks for the reply. I wanted to be able to run sound throughout the house but, in many rooms, I might turn the speakers off or switch to an in-room source (TV, radio, or CD). That means that the main amp might see 4 speakers or as many as 34. That seems to require a system like in a commercial building, huh? So several years ago I found on eBay a bunch of Sony cube speakers cheap. Sweet! I bought 34 and now all of the speakers in the house will match. I thought thet, while I'm waiting to finish the house, I would use one of these on an old tuner/amp in the garage. Burned out the amp. Huh! Turns out the speakers are all 3 ohm. So, THATS why they were cheap! Then I started talking with a friend who does commercial systems for churches. He said that what I need is a constant-voltage system but it needs to be a stereo unit or two mono amps. Most are mono. I found one on eBay that was stereo. Score! Now I need a step-down transformer for each of these speakers but they're all 3-ohm. None of the step-downs have leads for 3 ohms. That's where I sit now. I think the speakers are 80 watts.