McCormack or Pass Labs

Jwilt,

You asked about McCormack DNA-2 Rev "A"s, but feedback thus far has been limited to McCormack's "in general" and the DNA-225. Read the info (reviews and threads) about the aftermarket revisions by Steve McCormack at SMC Audio. I'm sure you already have though, or you would not have mentioned the Rev "A" in your thread.

My understanding is that these mods turn the amps into something very different than the stock versions, which are the only versions mentioned in the thread thus far.

I'd like to tell you how my DNA-1 Rev A mono-blocks differ from the "stock" DNA-1's, but I've never heard the stock versions. However, I can tell you that I enjoy my Rev A's. I have compared them to Krell 450-mcx, Classe CAM's, Wolcott ?, Mark Levinson 332?, and a few others. I discovered that I would have to spend a lot more to be a lot happier.

Good luck,
Jim

I only have experience with the DNA-125, but in my system, used as a spare to back up my VTL mono's, I thought soundstaging was a major strong point, although image height could have been better. I also did not find the tonal balance to be at all thin or bright, a criticism I've read of the new McCormacks. To me, it sounds smooth and deep, with quite good resolution, if not all the clarity or life of my reference, and has power and dynamics to spare. At the price I think it's a bargain, but this assessment can't necessarily be translated directly to the 225 (some experienced listeners have even reported prefering the 125 if the higher power is not a consideration). One thing I'm sure of is that you shouldn't seriously audition your McCormack until it's been on and playing music for at least 2 hours, and the same may well go for the Pass. Also, my 125 works much better with my Satori SC, whereas with my VTL's I tend to prefer the Au24, for whatever that's worth. It wouldn't surprise me if the Pass was better, only not for the same money.

I have an X250, buy it, you will have no regrets. Besides, you can always sell it and recoup your investment if you want to try something else. They sell well because everyone recognizes that it's quality stuff. However, you will not want to sell it.

My X250 is on the way...

Jim

I just picked up my Pass X150 earlier this week and finally had some time to compare it directly to my DNA 1 Deluxe for a few hours over the weekend. When compared to the McCormack, the Pass has greater low level resolution, is more detailed without glare or brightness (even at high volumes), has a deeper image and throws a wider soundstage. The Pass also has better bass definition, but not the slam or depth of the McCormack.

My intitial perception was that the Pass X150 was rolled off or soft, not so. I was just used to the forward sound of the McCormack. Also with the McCormack I would have to hunt for the correct volume, the Pass is incredibly consistent and neutral sounding throughout the volume range.

I'll be keeping the Pass. Overall it's a better amp and a good size step up in performance from the McCormack. In this comparison it was only bested by the McCormack in bass slam and depth.