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RE: McIntosh 275 MKVI Tubes

71.63.69.67

In Reply to: RE: McIntosh 275 MKVI Tubes posted by mps2002@comcast.net on January 14, 2025 at 15:04:22

Good luck with tubes on this amp. I talked to Ryan at AC about the stock 88s. He said that with the tube availability problem that McIntosh was getting tubes wherever they could find them. They still test them before sale as in the past, but that doesn't mean they sound good enough to show the amp's true colors. As for 88s vs 655os, I've had three other amps with a choice between the two, ARC D 70 II, ARC VT 100 II, and a pair of Mc 275's IVs. In each case I've preferred the 6550s - they've been clearer and more dynamic than the 88s, and a bit cooler in their sound. I haven't heard Gold Aero 88s or some of the really expensive os tubes so I can't make any recommendations as to how they will sound in any of the amps I have owned. I have noticed MC 275 VIs going for less on the used market than I would have thought. I wonder if the owners were disappointed in their sound with the stock tubes and weren't interested in expensive tube rolling.
LowIQ

Follow Ups:

RE: McIntosh 275 MKVI Tubes - mps2002@comcast.net 06:06:16 01/15/25 (0)
Just a quick follow up, McIntosh says I can use either the KT 88 OR 6550. I wanted to ask them since one tube dealer recommended not to so I felt I would go to the source and was pleased with their answer. Thanks again for all your feedback.
RE: McIntosh 275 MKVI Tubes - mps2002@comcast.net 05:58:31 01/15/25 (1)
I sent a note to McIntosh to ask about using the 6550 and will see what they say. I know Ryan very well since I have purchased a number of items from him over the years and even toured the McIntosh plant with him.
Some people feel the older 275s have a better sound and that the 275 MKVI leans a little more to the SS sound. I had a MKIV and feel the MKVI is better but it's all a manner of taste.
- RE: McIntosh 275 MKVI Tubes - dgaapc7 08:04:36 01/15/25 (0)
  Post another follow up when you've gotten more tubes in place.
  LowIQ

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