given your knowledge of Usher speakers, I'm curious to know what you'd suggest for my HT setup: CP6381 + X616 + S520
With the finish on the CP6381 and X616 I'd be reluctant to drill new holes, would a retrofit of the existing terminals work there?
Since I've entertained the notion of upgrading the tweeters to the BE units in the CP6381 and X616, would any crossover upgrades apply universally?
Most of those speakers have really nice drivers and really nice cabinets. But the wiring and crossovers in them are less than being close to the quality of everything else (to put it nicely).
The crossover design work in most of them that I have been into has been pretty good. I haven't seen any phase issues, driver break up, or amplitude problems. Though I did have to shift the crossover points down a bit on the BE-20's to improve phase relationship and vertical off axis responses.
What I mean by saying all that is that you can swap out parts value for value and come out real good on it. I would point to point wire everything too. The generic circuit boards they use are not something I'd re-use.
The binding posts on some of those models are large in diameter. So they look cool, but are not what you want in the signal path. The good thing is the hole is already close to the size they need to be for tube connectors.
I have had some guys do away with the dual binding posts and just replace the upper set with tube connectors and connect the lower set up to them in parallel so you can use either or. My favorite part about that is when the customer calls back to tell me how much difference there is in the two connectors and how much better the tube connectors sound.
If you try swapping out the tweeters then you will need to re-design the crossovers. And there is nothing wrong with their best soft dome tweeter. It is a very good tweeter. And it is a little more forgiving than the BE version.