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System very bright after adding Mcintosh amp

So, I recently added a Mcintosh MC7205 amp I purchased off of audiogon to my system. Im using a Marantz Sr8002 as the pre/pro and have b&w speakers (683 fronts, htm61 center, and 686 rears)

Anyway, I've noticed that recently the whole system is abrasively bright. It sounds like whatever I am playing is a poor-quality mp3 and hits those high-end pitches that almost seem to pierce your ears.

I've re-run audessy since adding the amp but didn't notice and improvement.

Any thoughts or suggestions?

Thanks!!
jastone7373
theo's avatar
theo
2,690 posts
 
If you plan to send it in you may also try audioclassics.com, they are all. McIntosh people over there and may have a quicker turn around. But you may try different cables and resolve your issue. But I would suggest calling both McIntosh and audioclassics and see what they tell you.
hifigeek1
770 posts
 
I'm assuming this is auto former coupled output. Are you sure you are connected to 0 and 4 or 8 ohms?
tmsorosk
1,013 posts
 
" Overkill amp?? " LOL.
unsound
7,329 posts
 
I'll hazard a guess as to why the B&W's sound bright with the McIntosh amplification: Perhaps the B&W's have a varied impedance, and the due to the McIntosh's use of auto-formers, the dBW output of the McIntosh amps is higher into higher impedance at the B&W's higher frequency response, and the dBW output of the McIntosh amps are lower into the B&W's lower impedance at lower frequencies?
jastone7373 OP
3 posts
 
Unsound-- that's a good thought as the b&ws do have varried impedance, but unless I'm mistaken, I don't believe the mc7205 has the auto transformers. I don't think MAC introduced those until the mc205/207
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