Went from separates to integrated amplifier. Had a Krell KST100 with a Electrocompaniet 4.6 preamp. Don t really listen very loud and I think the Krell was under used. The Pathos only looses a bit on the bass, that's not a surprise, and soundstage. But I'm happy with the detail and generally a non fatigue sound. Doesn´t feel under powered at all. As usuall will continue to try cables and eventually upgrade cd player.