Mr Atmospheres's amps were the best I had on my Vandersteen 4a's back in the day. That was a bi amped loudspeaker with an external electronic crossover. The Atmosphere OTL's smoked Conrad johnson, BAT and Quicksilver which at the time was the only tube gear we had in the store. They could not do bass well though. midrange and highs were magical. I used an Eagle 2a for the subwoofers in the Vandersteens. That amp could do bass. I meant no criticism to him. The guy knows what he is doing. Has been designing great amps for years. Look at my updated post on the Lyra as well. I brought home a new phono preamp and a VPI guru to check the Lyra out. The system ROCKS now. Total musical orgasm.