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Mcintosh vs. Audio Research tube preamps

Has anyone had the opportunity to compare, say, Audio Research LS25 with a Mac C22 original or commemorative? They have very similar values on the used market and I was curious as to anyone's perspective. Or say the LS25 (i or ii) and an MX110. I suppose I would expect to hear that the vintage Mac stuff is warmer with more rolled frequencies, but I'd love to get a first-hand impression from somebody. The LS25 mark 1 is also supposedly tube-euphonic, as well. It's a good topic for the old database!
todds7
aball
2,016 posts
 
I had an MX110 for a while but never had any tube ARC preamps. I rebuilt the MX110 completely and it sounded a lot more modern afterwards. Beforehand, it was soft and was lacking top end extension. Afterwards, it was surprisingly good. I wasn't expecting to hear a sort of "hifi" sound with excellent detail and transient snap - not exactly "tube-euphonic.". But I wouldn't advise you getting an MX110 (or original C22) without an overhaul - they are 40 years old these days.

Arthur
todds7 OP
18 posts
 
Art -- Yeah, ravages of time to be sure. That's a good point, suggesting (to me, anyway) that a real A-to-B comparison might be the C22 Commemorative and the original LS25, i.e., not mark ii. Thanks for your input.
jaybo
4,478 posts
 
the c22 commemorative is superb in every way, and the newer c220 and c2200 as well. i wouldn't describe them (or the arc's) as anything but neutral however...not like a cj or the holy grail, marantz 7.
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