Hi Ragnarok,
I'm running M60s with a 55wpc HK and have no problem at all getting to play too loud in a 17'x21' (+ or -) room. The 80s are more efficient so I am sure you will be fine unless you have a very generous rom .


Getting to 2,000 posts; one year at a time vp160/qs8/qs4/SVS 2000/m60/Monolith 3x200 amp