I recently visited someone who was running mono NAD power amps in bridged mode, into Dunlavy Cantata speakers. These have a 4-ohm impedance, so he realized he was tempting fate. He still felt it sounded really good--far better than many supposedly better amps--but he knew he had to find another amp.
I visited him so he could hear the Neurochrome Modulus-686, and I brought along the Avondale SE200 dual mono and NCC300 monos. (He was running a Prima Luna tube preamp.)
- We started with the SE200, and I was surprised that it couldn't manage the load. It sounded rather disorganized and "pushed". I had never heard that from the SE200 before.
- The NCC300 sounded great, controlling the speakers very nicely, with a tantalizing sense of engagement.
- The Neurochrome had no difficulty powering the speakers, but was short on PRaT and engagement. Details were better though, and distortion was very low.
We went back to the NCC300, and he decided to buy them from me. Lesson learned: You can't predict how an amp will sound until you hook it up to the speaker.