I am using a 1.25KW as a subwoofer amp in my upgraded system. It sets between my 1.2KW's. In my opinion it is not worth the trouble to upgrade from the 1.2's. The 601's may have been more needy of increased capacitance being only 600 watts. But the 1.2's are not even remotely stressed in driving my Alexxes to ear splitting levels. They don't even get slightly warm. In fact my 1.25 runs a little hotter than my 1.2's in my opinion which is surprising. The 1.25 is a beautiful amp. I really like it.
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