• Krell Evolution 900 power amplifiers create the best bass I have ever heard in any system ever. They currently set the standard for the best, deepest, most controlled bass I have ever experienced in my room and beyond. Other reviewers heard them in my system and seconded my opinion.
• The highs are better, more refined, more open and less cold than you might expect. Hell, at $40,000 a pair - you have the right to expect the world. With the Krell Evolution 900s Dan D'agostino delivers it to you on a silver platter.Low Points
• These monsters create a good amount of heat and are too big to fit in a traditional equipment rack not unlike Mark Levinson's (now discontinued) No. 33 amps as well as Halcro's heralded top of the line amps. While Krell's Evolution amps are the right physical configuration - they are just too big and run too hot for a Middle Atlantic style rack.Conclusion
Halcro's top-of-the-line amp was called the Best Amp In the World by Stereophile Magazine years ago and in many ways I understand their point. At the same time, that was before Krell came out with the Evolution 900s. If you are in the position to chose between the Halcros and the Krell Evolutions its tantamount to having to chose between a Porsche Carerra GT and a Mercedes SLR. Which was is better isn't really relevant. Which one you like better is all that matters. For me, I would have sold body parts to keep the Krell Evolution 900s in my rack if they fit. When it was time for me to ultimately say good bye I took the coward's way out and hired my installation company to pack them up and restore my system to the old configuration. Then I didn't listen to my rig for a month trying to forget what I lost out on. It was like a nasty, heart-breaking romance