I don't think it's a power issue, but need to find the right synergy. I currently drive my Reference 5s with a single MC275 and have no problem with bass output. I've also ran them with an Audia Flight FL Two integrated (100 wpc) and a Mark Levinson 23.5 (200 wpc) and, of those two SS power units, I preferred the Levinson by far. The Audia Flight drives my Fact.8s very well, however.
My room is not large but I was thinking I would need to get another MC275 to run them in mono in order to match the output of the Levinson but, after trying it with just one, I have no desire to add another.
My room is not large but I was thinking I would need to get another MC275 to run them in mono in order to match the output of the Levinson but, after trying it with just one, I have no desire to add another.