I bought this driver because it was rated up to 2KHz. I have it paired with a big Horn and 2" Horn Driver. Both the Accuton and the horn are crossed over at 1.5KHz in my custom built tower speaker. They are bi-amped using two 45 watt tube amplifiers. The combined sound is very rich and smooth with superb imaging, the sound is so rich you can almost touch it. The Accuton has good, musical sound but it does not have explosive bass, at least at modest volumes.
I also have an Outlaw sub, but no sub can provide the musical bass lacking in some speakers. Eventually I plan on including a larger 10" Accuton Cell in parallel on the same 1.5KHz low pass circuit. It will be to supplement the 8.5" with a little more impact. These will be five to six thousand dollar speakers, cost to build, not retail.
The (first?) picture is of my protype tower speaker. It is made of 3/4" MDF. The second pic is of my Klipsch that I am using as a testing stage. The second prototype that I build will have the Accuton up higher as close to the horn as possible. I listen to the music standing up and having the drivers at ear level renders the best sound, impact and imaging. The imaging is superb even at different locations but of course there is one sweet spot where it is the best.