Hi:
I am a dedicated Pass lover and have had several amps, including both the Aleph 5 and Aleph 2. Let's clear away some misconceptions.
1. The Aleph 5 has 60 watts, not 100, and a smaller power supply.
2. The Aleph 2 has 100 watts per chassis, with larger power supplies dedicated to each individual chassis.
3. Thye have the EXACT same number of gain stageds and circuit topology, possibly excepting the feedback loop--I don't know if they use the same amount of feedback, but it is low in both cases.
4. Both are wonderful sounding amplifiers, with that spooky magic that audiophiles love. The Aleph 2, however, will sail along in situations where the Aleph 5 will clip or shut down.
5. For further questions, yalk to Perter Perkins at Pass Labs. The man is a saint and quite knowledgable.
Good luck,
Jeffrey