The Stereophile review used really old speakers with the Peachtree, it was a bad match apparently. Why the reviewer didn't try it with other speakers is in question. Something must have changed because now Stereophile has it as a recommended component. All other reviews for the 300 are very positive. Also, the Nova 500 is out. That might be worth investigating too.
Peachtree Nova 300
Interesting review. Check out the video at the bottom. Hilarious! This reviewer calls it the best amp on the market. While I like Peachtree, a lot actually and I feel their products punch above their weight for sure, this reviewer may only have limited experience and in a limited price range.
https://www.themasterswitch.com/review-peachtree-audio-nova300
https://www.themasterswitch.com/review-peachtree-audio-nova300