Any experience with The NSMT Model 25/Chorus Loudspeaker?

I was amazed by 97 db sensitivity and crossover-less woofer. I've heard about loudspeakers without crossover but they had a single speaker.

The JBL 100 ran its 12 inch woofer full-range! No coil! That partly explains its lively sound! That particular woofer was quite linear past 1K. Though the crossover had other problems! But no coil let the amp have better damping control of the woofer!

It also had a hefty magnet and a tight gap. Nothing beats a big motor for linearity!