I think there might be another thing to consider: possible damage to speakers if there is a power surge or interruption, or a malfunction upstream in your system, that could send a large transient through your power amp and on to your speakers.
I am driving my Thiel CS3.6's with Rowland 201 monoblocks, which draw very little power, and which could be left on 24/7 if I wanted to. Because of this concern for transients, I always switch the amps off when I'm not listening.
I am driving my Thiel CS3.6's with Rowland 201 monoblocks, which draw very little power, and which could be left on 24/7 if I wanted to. Because of this concern for transients, I always switch the amps off when I'm not listening.