At 101 db efficiency you will never use all that power. Consider that the 7125 could drive those speakers over 120 db and the 7900 to about 125 db it isn't cost effective to get the 7900. I would save the cash and get a 7700 or a 7125 as they will both be killer. Remember if you have to move or shipped the 7900 it will be a chore for two people.
Oh, I don't know about that lmao. While it may not be often, there are times I like it loud, and when I say loud, I MEAN LOUD! I have an SPL meter and I have a mobile DJ system consisting of JBL pro speakers. The meter only goes up to 126db, once it goes past that, it just blinks at 126db. I've had it blinking with my DJ set up lol. I know I know, terrible for the ears, but it is on rare occasion.
The speakers are capable of handling far more then 450 watts and have a max SPL of 133db. The more headroom, the better (in my mind). The weight has no influence what so ever, neither does the need for 2 dedicated circuits. Both of those things are not problems at all. And If I ever decide to go with more inefficient speakers, I'll be covered. I'll probably be keeping this amp as long as its running, with many different speakers.
These to be exact as front left, center and front right speakers
http://jtrspeakers.com/home-audio/triple-12ht/
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