Pass vs. Edge

I went from an X350 to an Edge NL-12. The Pass's bass was more oppressive and much less nuanced than the Edge. The Edge's bass has more dexterity and is more natural, deep but not pushy. The Pass is slightly more silky on voices, but barely so, but the Edge has more air and again sounds more natural. In fact, I would say that the Edge's greatest strength is the airiness of all musical components, and the ability to place these components in their own space. The Pass has more of a golden glow that can be very appealing on lesser-quality recordings, while the Edge will show the flaws in these recordings. The Edge is more open and relaxing. The Edge portrays complex orchestral passages with ease and no sense of compression. The Pass was slightly compressed. The Pass ran very hot & would heat up the room so much it left me sweating. Both the Pass & the Edge have smooth, not-tizzy highs. The Edge is never more than warm. I am very happy with the Edge. I heard my Kharma speakers with good tube amps and I prefer the Edge, which has a feeling of purity. Perhaps it would be more fair to compare the X600 to the NL12, but I never did hear the 600s. 'hope this helps.

When comparing amps of this quality, you better have AT LEAST a good dedicated 20 amp line just for the amp.

As a side note, the newer Pass amps are using better quality rectifiers in the power supply, so the bass should sound both more defined and more nimble. Some have complained that the Pass amps aren't the fastest in terms of bass attack and impact ( as i have ) and this should help clear some of that up. Sean
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I assume all of you have not auditioned the new X .5 series yet. It is a whole new ball game. Please do yourself a favor and reevaluate Pass. I had owned all Pass X series amps before. I have now the X250.5 and I like it a lot.

Excellent inputs. Thanks for the info, this is helpful.

Pass Aleph 1.2 mono block power amps are just incredible !
Pure heaven in the midrange and very warm/tubey sound for being solid state .