Poping noise starting up Mcintosh MA 6900

The reason I suggested exchanging for a new one, was that I did know that McIntosh would back the dealer on the replacement. That is where they excell.
Glad you are now getting what you deserve, an amp which does not pop.
On the passing dc thing, I know that the gentleman could be correct, but I am always one to suspect the worst when it comes to something like this.
I have had McIntosh amps take out drivers before, so not passing dc must be new to their design. It has been several years since I attended McMasters. Maybe there were mitigating circumstances in my experiences. Anyway you are well served.
Good listening.
Larry

As a follow up, the problem has been solved by my retailer.

Transformer coupled outputs cannot pass DC. This is fundamental to a transformer of this type. As for the retailer exchanging the amp - be happy you bought a McIntosh. Krell would not do this for me a few years back. I had to send it off and wait for several months. Needless to say, I don't have Krell any more. Arthur

Am not sure why you would be unhappy with McIntosh. In less than 48 hours of posting your received a new replacement amp. Pretty good, if you ask me. You were lucky you didn't have to wait for one to be shipped in.

HELP! I have the popping noise too on my McIntosh MA6900. When I flip the power switch on, a slight pop goes to speakers. When I turn on the standby, a very loud pop goes to the speakers and I'm afraid it is going to ruin my tweeters or something else. How did you solve your problem?? I need help if you can please