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New McIntosh system problem... need advice

I've just assembled a new Mcintosh system consisting of a C220 and and MC352. I was replacing my old Arcam alpha 7 integrated amp, which has served me well, in preparation for upgrading my B&W DM602 speakers to something larger (probably B&W 703 or 804). I have kept my Arcam alpha 9 CDP.

My problem is that I don't feel the extra $6000 of amplification has actually improved my sound. The midrange, and especially low-range frequencies definitely have more weight and richness, but the higher frequencies are really lacking. In comparison with my Arcam amp, there is very little detail or clarity in the highs. This deficit is as dramatic as the improvements in the lows.

Does anyone think think this is typical? Is this the "tube sound?" I'm using the same cables when I A/B with the Arcam amp, so it's hard to imagine the problem lies there. Could I have defective gear? I bought it gently used, so I can't really exchange it. I would love to get some input on others' experience with these components, and also advice on which of the two amps might be more responsible for the problem.

Thanks!
marleysf
face
516 posts
 
I also found using a Mac pre and amp together was too warm for my source and speakers.
audphile1's avatar
audphile1
4,781 posts
 
more bass can make treble appear softer. give it time to adjust to the new sound and if you don't adjust to it, move on to something else. I am not sure upgrading to 703 or 804 will solve the issue completely. If you won't adapt to new sound, Mcintosh is probably not for you.
stewie
187 posts
 
I'd strongly echo Thorman on tubes--not only fresh ones, but 12ax7s (that's what your c220 uses I believe) that will give you more of the highs you feel are missing. For a good run-down on tubes and their sound, google Joe's Tube Lore. Not everyone agrees with Joe Rosen's take on tubes, but I've found it to be a very reliable summary of the sonic characteristics of 12ax7s and 5751s. They can make a huge difference, and I say that as someone who's dubious about most of the claims made about cables and ICs.
stringreen's avatar
stringreen
6,440 posts
 
..that's why it is so important to audition the component in your system to hear if it really is an improvement. Obama won on the subject of change but never spelled out what that change would be. ..maybe good, maybe not...
missioncoonery
1,214 posts
 
I agree with changing pre tubes to start.I really like the older Mullard long plate 12ax7s and 7025s.I didnt like the sound of my 402 with a Mac preamp.You might also add a few makers to your short list on speaker replacement..Dynaudio,Focal.Im guessing its your speakers
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