Peachtree and Magnepan = No Bueno

Greetings all. A while ago I tried my Magnepan 1.7i with a Peachtree Nova 150 and found it to be a terrible combination sounding very thin, dull, quiet and having the imaging completely collapse. I’m wondering if anyone else has experienced this with a Peachtree/Magnepan combination and if Peachtree might be fudging some of their power output numbers or if it is a low current amp. Any ideas? Thanks!

The amp I normally use to power the 1.7i Maggies is a McIntosh MC275. I also tried the Peachtree with my Maggie MMGs and while it wasn’t a terrific combo it sounded much better than with the 1.7i.