I now the 4 ohm question comes up a lot, so bare with me. i am asking bout pairing the m80s with my pioneer elite 92, hoping that the 4 ohm is not a problem. if any has the same pairing can you tell me that its a good or bad match, also how you got the pioneer to go down to 4 ohms. the instructions only give 8 and 6 ohm options. hope this isnt to dumb of a question, just want the m80s really bad and seeing if i have to buy a separate amp for them.
thank you

Leave the Pio on 8 ohms, the 6 ohm setting merely limits the current available. Don't worry about "matching" speakers to receivers or amplifiers, any amp/amp section designed in the last 20 years or so to have flat response (ie, not a tube amp) will sound the same.

Get the M80s and try them. Mine work fine on my H/K 525, which only puts out 75 WPC.

thank you k

But I don't even know you, and this is a family forum!

Hello axiom_fan

Welcome to the forum,

Do not use the impedance selector switch because it will drop the voltage to the power sections which can limit the dynamics (less headroom) and overall fidelity. It is best to leave the switch always set to 8 ohms.

The reason manufacturers implement those switches is mainly due to UL approvals.

If this is a family forum, I'd hate to see the naughty ones.

Your Pioneer is THX certified which means it can withstand a 3 ohm load, you should be good to go and as the others have mentioned no need to do any power adjustments, just run it as is.

From what I remember, Pionneer is certified THX Select2, which does not include 3.2 Ohm test. It is the Ultra2 that does that.

It is my understanding that for an avr to receive any type of THX certification it has to maintain the same power specs, the select and ultra etc. have to do with the audio processing for room size etc.

I have a strong impression that I saw a table where there 3.2 Ohm was in a column for Ultra, but not for Select. I just spent 15 minutes trying to find anything on the subject to no avail (I remember it had taken me quite a bit of effort the first time).
So I would say that, until I find it again, let's assume they both have the same tests for what I think they called "amp stability". If I ever fall on my original info again, I will enquire further and report back (but I do not intend to spend any more time on it! ).