Absolutely not! (Sorry for the emphasis)...You can not bridge any Yamaha M-85 or M-80...there were not made with that capability...Well, let me rephrase...Yes, you can bridge them, as a matter of fact you can do whatever you want with them as they are your property but those models were not made to run that way...they can not handle such parameters...they are not stable in such conditions and you will fry them! And fast! I'm somewhat familiar with those amps and that's a big no, no. To go that route, you need to find yourself some of the Yamaha "Pro" line amps. Just to give you a couple of examples...Some Yamaha amps with the model #'s starting with a xm or xs or with P...I personally like the XS 350. This amp will give you 230 Watts RMS into each of the 2 channels @ 8 ohms each and it will give you 700 watts RMS when bridged also at 8 ohms! And that's true RMS Wattage! You can probably find one on Ebay or something, one just sold a few days ago for like a bit under $300 bucks (including shipping).
