2. amps-preamps
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A/B comparison McIntosh MC275 MK IV vs. MC275 MK VI

Has anyone done an A/B comparison between the MK IV and the MK VI? I had the MK IV with stock preamp tubes and Gold Lions on the output. Sound was awesome with very sweet mids, but lacking a little bass. I just upgraded to the MK VI. I feel that the bass is deeper and tauter and the highs are definitely sharper, but the mids are not as beautiful and fluid as the MK IV. I'd appreciate any thought or comments.
yyman23

Showing 1 response by lewinskih01

lewinskih01
907 posts
 
I have not heard the mk VI, but have the mk IV and I've tried a couple of things.
On my amp/system, fuses had a very marginal impact.
Rolling 12ax and 12at tubes had a significant impact.
Replacing stock kt88 for shuagang treasures had a very significant impact. Maybe even more than with the smaller tubes, but frankly a lot of time went by between one and the other roll.

Including a Bybee on the line-in had a significant impact.

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