Well folks I had to smile at a few of these replies, reflecting on my HVAC`s thermostat set on cool @75`F and the outside temperature hovering @ 42` F, while watching a BR DVD with my B-I-L last night and with (4) mono`d Mac MC 275 VI`s, (1) MC 60, (2) MC 1201`s, (2) Crown D-150`s rears & sides, ect. cooking away + the Sony 4K projector all contributing their heat load !!
My HVAC was cycling frequently enough to maintain "comfort" !!
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During the summer here in NE . FL. when running the main living room HT system every weekend, I wince, and seriously consider stock options with my Electric cooperative !! Close to average 30 amps @ 120/240 volts consumption when in the HT mode !!!!
Some of you folks have it easy, in some respects, especially when, in my case, my B-I-L is on vacation for a week or more during the lovely hot summer months here, and with him walking over from next door wanting to watch a movie on the "Big Screen" every night for a week, or sometimes two weeks in a row !!
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Yea !!! My electric bill reflects it, but he`s a good reliable best friend/in law..
At least he buy`s and brings over his own JD # 7 booze, but he does like me providing the microwave popcorn..
Yes !! I concur, tube amps/equipment(sonic space heaters) can help warm~heat up a room !!