I was wondering if anyone had used the Pass Labs Aleph 3 amp from a few years ago with hard to drive speakers. I've seen this amp for sale used for about $800 and it seems like a good value, especially considering the reviews, but I will be using it to drive 87dB 4 ohm speakers and was wondering if the amp would have trouble with them.

Also, I presume that the amp will run quite hot considering it is class A, but is this a big concern? i.e. does it run too hot to place on an equipment rack?