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Attn: McCormack DNA 0.5 owners

I purchased a DNA 0.5 used about 5-6 months ago and love it, I do have a question about it though. When I turn the amp on and off, I get the dreaded THUMP, is this common to all McCormack DNA amps? The amp I had prior to the McCormack had a little thump, is this a problem with most ss amps? Will it go away if I send the amp to SMC for upgrades? I have been thinking about sending the amp to get a Rev. A upgrade done. Any help or info would be great. Thank you.
zspradlin

Showing 1 response by stehno

stehno
1,453 posts
 
Do you have a 0.5 with a revision c, b, or a? I was just talking with somebody about this. It appears that this sometimes frightening thump has to do with wether or not your particular model has (I believe them to be) input relays.

If you have a Revision of the DNA 0.5, then if that model had the relays and the relays were removed, then the thump appears at startup and/or shutdown.

You should first contact the previous owner to see if he had anybody work on the amp.

Next contact Steve Mc smcaudio.com providing him with the serial number and model to see what he has on file for this particular unit. And of course describe the problem you are experiencing.

-IMO
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