So, I have a pair of 15" Eminence Speakers that a friend pirated out of some sort of subwoofer cabinet. The problem is that they are (seriously, I've checked and EMI has conifrmed) 0.8 ohms each. Wired together I get about 1.4 ohms. I happen to have a vintage Univox bass head that has a 2-ohm output selection on the back panel. If we were talking 8 ohm to 4 I'd be ok, but maaaaan, this is LOOOOW. It is still within a 50% tolerance (if we're to believe the 2-ohm output claim on the amp, it's within about 30%), but maaaaaan, this is LOOOOW. I had it in to a local, very highly regarded tech about 2 years ago, he replaced a few caps/resistors, corrected some ground problems, gave it a clean bill of health and said it makes 104 watts properly wired into an 8 ohm load. http://www.univox.org/pics/schematics/u1050b.gif I'm gonna wire it up, then have a beer and think about it. Maybe try it out after I have a chance to sleep on it, maybe hear from a few of our fine tech peeps here.