Monoblocks to consider?

I'd recommend adding another ZH270 then strapping the channels making them into monoblocks. The combo is killer, I did it with my old Soundlabs and it was the best amp combo I have heard to date. This might make more sense than switching to old school tube amp technology. The Atmasphere will run much hotter, have much less bass drive, are way more high maintenance and less efficient than (2) Berning ZH 270's. with channels strapped.

Hi Dgclark0007, I agree Atmasphere amps sound good, no question about it. Berning amps are mega reliable, stable and low maintenance designs. Tubes last a very long time due to the grid drive. It would take much longer than 3 years before requiring a drive tube replacement for a ZH270. Bass from the Bernings are world class, they are not outclassed by much. If comparing apples to apples the new Berning Quadrature designs would be a better direct comparison to the MA2 MKIII as the Atmasphere amps cost nearly 7 times what a single 270 did when new. Resale value on used Berning products is also very high. Ultimately, I feel as long as you are happy with your gear and your system thats all that really matters. Cheers, Chris