I got a hold of Marc Koval and ordered three tweeters - I've tested all the speakers and they all work perfect except for the bad tweeters.

I had Seas tweeters similar to these in some Mcintosh HT-1 and SL6 speakers - they have ferrofluid that turns to sludge and locks up the tweeter - this is probably happening in most DSP420's over time with this tweeter (and is mentioned by Roger Russel of Mcintosh on thier site)


1. 568.2mm & 3xDSP5500 2. 565/562 & DSP5000's 3. Director & 568.1 & Edge Amp & Klipschorns