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In Reply to: RE: Back to the Future with a McIntosh 2100 posted by dividebytube on August 28, 2014 at 12:17:01
The thing I always do to the 2100s and the 2105s and the 2505s is,recap the driver boards,resolder all the connections on those plug in pins on the driver boards,then clean the pins with tuner cleaner or Deoxit...Do that and you will be amazed.It's good to change the input rail caps but if you don't,I would bypass them with a 10uf poly cap on each big cap.
Honest amplification is better than excessive 2nd order distortion anytime.
Follow Ups:
In the past I did some cap replacement work on the MC250 and it did change the character of the amplifier - a little less vintage-y and more modern. So this time I want to proceed with caution... keeping the input caps but - as you recommend - do a clean up and PS cap job.
I always use Muse KZs or the NP muse caps. Jim McShane has them.
The 2100 series amps are quite good actually..With a decent tube preamp,they are similar in sonic nature to the tube Macs of the day when properly rebuilt..They had to be because there was a huge price jump from the Mc275 and the autoformers do quite well in helping achieve that.
Honest amplification is better than excessive 2nd order distortion anytime.
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