I like the idea of separates as well. ATI reportedly builds the Monoprice Monolith amps. HSU has been suspected of being involved with the Monoprice Monolith’s subs.
I’ve been running a Marantz 7704 with a Monoprice Monolith 5-channel amp and I’ve found that separates provide better separation of effects, clarity at higher levels of volume, and greater dynamics. Both the pre and the amp have been rock solid for the past 7-8 years.
@toro3 Yes, Dr. Hsu did indeed design some of the earlier Monolith subs. ATI has a hand in the Monolith amps, but the latter is built/restricted to a price point (similar circuit design, parts quality commensurate with price). Monoprice has a history of pairing with the right technical SMEs to get them up to speed.

