McCormanck 225 or upgrade my DNA-1 to a or B Rev.

I actually preferred my DNA1/Rev A to the original 225. Report is somewhere on www.stereophile.com

Kal

Owned both. The 225 is a an incredible upgrade over the DNA 1, especially in the bass...

this link has some interesting info by some owners of upgraded 225 and DNA 2, as well as some comments by SMC.

http://forum.audiogon.com/cgi-bin/fr.pl?ramps&1114108053&read&keyw&zzmccormack=dna-225=platinum=edition=upgrades

You should also do some searches since similar topics regarding the upgrades have been discussed here and on audio asylum - amp/preamp