Experience with Simaudio Moon North amps

I've only heard the 761 in stereo, two systems paired with the 791:

• Sonus Faber Amanti
• Wilson Watt Puppy

I have been impressed by the 761 - detail, finesse and dynamics.  Given the price difference between the 761 and 861 and the physical difference I would want to audition 861 in stereo versus 761 in mono.

I have had the 761 stereo amp for several weeks now; I’m pairing it with the 791. It’s powering Opera Callas Diva speakers (also handmade in Italy). I can’t say enough about this amp. I love it. I don’t see how you could go wrong with the partnering equipment you have listed. Octave preamp output impedance is low enough to not cause any problems with either Moon North amp. The clarity, dynamics, and reference level performance of the 761 or 891 will let your source components shine and very likely bring out the very best from Sonus Faber speakers. You may have to dial things in to your specific tastes with cables, but again I think you are on a good path. For what it’s worth, a single 761 in stereo mode packs a punch. It’s rated to 400 wpc continuous into 4 ohms. Assuming you have a massive room and like to play at party levels for wanting to consider mono blocks.
Happy Hunting!

Thanks to you both. I used a moon 390 for several years and have a moon phono stage. I’ve been very pleased with simaudio products But have not had a chance to hear anything from the new north collection.

The primary reason I would consider mono is to maybe get a little improvement in the soundstage, but the amp certainly has plenty of power. Happy to hear the positive review.