McIntosh MC275, enough power?


I'm contemplating an amp upgrade to the MC275 or 252 (ss) to drive my B&W 804s. Will also run a Rel Storm III sub. I love the sound of the 804s & 275 combination, but I am not able to bring it home for a demo.
At some other post somebody suggested the 275 might be underpowered for the size of my room and I might want to look into the 252. Room is 33' L x 15' W x 8' H.

I checked this SPL calculator http://myhometheater.homestead.com/splcalculator.html
While it suggests the 275 would have enough power, I'm puzzled because it doesn't take into consideration room size.

Comments, thoughts, insights? All very welcomed!

BTW, side question: any issue with integrating tube amps and a SS-driven sub?

Thanks
lewinskih01

Showing 1 response by nsgarch

Go with your instinct. Get a 275, it will probably be fine, but if later on you'd like a little more headroom (control at higher volumes) then get another 275 and run them in mono. That way you can have your cake now, and more cake later if you want!