I also have 20 foot MITs. They claim their terminator box tweeking compensates for the length. They sound good to me, and a lot better than the 18 foot ones they replaced, so I assume it is true.
You must have a verified phone number and physical address in order to post in the Audiogon Forums. Please return to Audiogon.com and complete this step. If you have any questions please contact Support.