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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
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
theo's avatar
theo
2,689 posts
 
The MC7205 does not have autoformers and neither do the MC205/207. They have only made one amp with more than two channels that uses autoformers and that the 3 Channel MC303. 5 Autoformers for one wouldn't fit and the amp would require a forklift to move. Jastone you only have a 4 or 8 selection to choose from and a input variation selection for each channel on the 7205. But I seriously doubt these settings are creating the issue you seem to be experiencing. Were you able to contact Mc or Audioclassics today?
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