@unreceivedogma
Re your comment above: When they get honky, it means something is not set up right, or something is failing.
I'm interested to learn just how you approached this issue. I've owned Altecs on & off since 1960. I currently have a pair of 604Es in my system and also use Mastering Labs crossovers. The speakers have a distinct, cupped-hands sound that I cannot get rid of. My amps range from a solid state Hegel H-20, to an Elekit 300B. My preamps are EAR 912, CJ PV5A, and ASL. They all sound different but don't change the basic sound ot the speakers.
So, I'm curious to find out what you did
Many thanks,
Fred