The mid is a Celestion, the tweeter a KEF and the woofer is a Rogers. Black walnut cabinets with centered, round tapered lip forward vents. That makes them later production and cures the "bloom" of the earlier square vented models. They have a phase-corrected crossover design and are quite inefficient. I've had a pair I bought new and love them. One day, a driver or an electronic component will die, and I'll have to move on, but until then...
Newbee is correct that they want a lot of power; I use a MC 302 and that's just enough for my smallish listening area. They are rated to 300 W peak and respond 40 Hz to 20 kHz. IMHO, one of the best studio monitors ever made and very nearly the equal of the much better known (and much more expensive) B&W 801. Neutral, transparent and superbly musical.
Newbee is correct that they want a lot of power; I use a MC 302 and that's just enough for my smallish listening area. They are rated to 300 W peak and respond 40 Hz to 20 kHz. IMHO, one of the best studio monitors ever made and very nearly the equal of the much better known (and much more expensive) B&W 801. Neutral, transparent and superbly musical.