The Philharmonic BMR HT Towers have AMTs produced by Mundorf. It’s the best AMT I’ve encountered. I can only presume the most expensive Mundorf AMTs must sound absolutely incredible. I rate the Mundorf AMT and RAAL Ribbon in the Philharmonic series on par with the very best tweeters of any type in terms of pristine, non-fatiguing, yet extended highs. Even $500/each Satori Be tweeters don’t quite match the Mundorfs or RAALs in that regard.
Another poster claimed all AMTs/Ribbons produce image shift. That isn’t remotely true IME, and I’ve heard/owned some of the best imaging monitors available for reference. I can only hypothesize that those he heard had poorly designed crossovers, or they were simply cheap examples like those used by Wharfedale. Some designers attempt to cross them too low or shallow which can result in comb-filtering.
Since both designs are wide dispersion, they are often best implemented in a three way, so that the whole mid/high frequency range has a similar dispersion pattern. It’s important to note AMTs function differently from ribbons. They tend to have similar dispersion characteristics but AMTs have the advantage of better power handling and robustness/longevity.
Anyhow, with the Philharmonic HT Towers, not only do you get one of the best tweeters out there, you get top notch midrange performance, along with fast, defined and deep bass from the Purifi woofers. All in compact, stout and beautifully finished cabinets for $5K/pair. Additionally, they can play louder, with lower distortion, than many tower speakers of twice their size and price. These speakers have science-backed design principles and state of the art drivers. They are probably the best sounding passive speakers under $10K/pair in terms of what you get from the whole package, unless you go the route of DIY.

