Originally Posted by LowellG
I search for similar threads, but they seemed to deal with the reverse of what I was thinking of doing.
I picked up a cheap Sony HTS that supposed to be a 1000W receiver for my game room and then I noticed it's 3 ohm. I planned on upgrading the speakers on my main system and move some Def Tech PM 80s to that Sony system. I was wondering if the 8 ohm Def Techs will run on the Sony receiver and can it hurt them?
Not familiar with what model of Sony you're talking about, but I'll assume it's something that comes as a total HTIB type system.
Ratings of amps and AVRs can be wildly all over the map. There's just not one rating scale that you can glean to compare.
So, I'll make some generalizations here. The lower the impedance, the harder the load. Most amplifier sections will put out more watts and lower Ohms (as with most things, there are exceptions). That's not to say that they do so cleanly, at an acceptable THD level (generally .1% or lower is acceptable) or with acceptable sound. But, to hit a spec, that's what they're quoting (1000 watts). If you divide that up into 5 channels, that means it's putting out 200 watts per channel, but who knows if it's simultaneously, or with acceptable THD.
I know of no Sony product, even their ES stuff, that's capable of doing that within acceptable parameters.
My guess is the Sony can indeed drive your 8 Ohm Def Techs. What it sounds like in doing so is another matter entirely.