Actually, the ScanSpeak 22W8524 is an awesome driver for this application -- ie, nothing below 100Hz (24 dB/oct LR4 crossover) and nothing above around 1kHz. The only other ones I'd consider are the Textreme Satori drivers, esp. the 9.5" WO24TX.
10F is just about unbeatable, imo. If you dig into the pro catalogs of Beyma, etc, you might find the odd one this size that has similar linearity with higher sensitivity/power handling. That might be worth it, but I haven't looked or found one.
Did not check the Radian LT2.2 Don't think it was out when I built the system. It looks like another variation of the B&G NEO3 planar magnetic. I've used those and know the AST2560 is a bit better in almost every way.
Front plate of the AST2560 is easily removed, ditto the back. Very easy. Installation gets a bit difficult. Mine are friction fit in the baffle, which is slightly over 1" thick. A shallow waveguides for front & back could give me flush mounting on both sides... haven't got around to it yet.
PS -- AS you can see from the pic below, the OB baffle is actually a bit shorter than the original, and not ezactly the same shape, but close. It would benefit fromt being a few inches taller.
PS2 -- Also, the dual woofer config isn't the M-frame of the original LX521, but Linkwitz-W. This provide near-complete force cancellation of vibrations in the woofer frames, which makes the entire bass "box" virtually free of vibrations. Which is why I abandoned the M-frame {the left speaker system in the pic) as well as the awkward "bridge" for the upper baffle of the original. No need for it with such low vibration in the bass box.
PS3 -- if you want a pic of the backside, LMK. I can't find one but can take a fresh pic to post.
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