I cannot speak for the Aleph 2, but I owned an Aleph 5 for a while. The midrange on that amp was wonderful, but the low end, in fact, was its weak point, to my ears and in my systems. It was not terribly articulate in the bass and did not grasp the lows with the same authority it did the midrange. I also felt it was underpowered at a rated 50 watts (which I think is exaggerated). From all I've heard the Aleph 2's are better in every way, and even the less expensive 3's and 30 have better lows than the 5. The Aleph series in general are supposed to all excel in the midrange. Mind you, I am not saying the 5 is a dog...in fact I liked it very much. It did do complex music quite well indeed. I just wish it had more power for the large space I was using it in. I thought it worth mentioning that weakness should you look elsewhere in the Aleph range.
Marco
Marco