Specifications (From Klipsch)
Total System Frequency Response	29-20,000 Hz
Maximum Acoustic Output	110dB SPL at listening position
Amplifier Headroom	4 x 60 Watts, Satellites 1 x 160 Watts, Subwoofer
Satellite Impedance	4 ohms minimum
Dimensions:
Satellite (including bracket)	8.5" H x 4.2" W x 5.67" D
Subwoofer	9.25 H x 10.25 W x 13 D
Satellite
Sealed elliptical enclosure two-way system with 0.75" polymer dome tweeter mated to MicroTractrix Horn. Midbass driver is 3" long throw design with advanced fiber-composite cone and urethane surround for high output.
Subwoofer Enclosure
Bass-reflex MDF enclosure with front port and dual side-firing active 6.5" drivers (long throw design). Flared tuned port for enhanced bass coupling and deepest system tuning. Sixth-order design allows for high output, low distortion bass while minimizing excursion.
Amplifier
BASH® (Bridged Amplifier/ Switching Hybrid) design with high efficiency/ high output power. Discrete MOSFET power section for high current, maximum dynamic headroom.

The specs of this system are just incredible for a multimedia system. It's hard to believe that it's been a year since these speakers were actually released. The satellites use a MicroTractrix Horn and tweeter combination to deliver some nice high end sound. The subwoofer is huge and uses dual side-firing drivers that deliver some nice bass. The preamp is located right at the back of the subwoofer. All the inputs to the speakers and power are located there. Below is a shot of what the back looks like. If you're skeptical that the system actually uses 400 watts RMS, next to the power cord it says 120V, 5 Amps, which means 600 watts (120v x 5A). If the amp is capable of pulling that much power, getting 400 watts isn't going to be a problem. The technology that went into this speaker system was ahead of it's time, and it's evident considering these are still one of the top speaker systems more than a year later.

What's lacking from the ProMedias? Well, there's no on/off switch or headphone jack. Klipsch has developed a very efficient power system through their patented BASH® (Bridged Amplifier/ Switching Hybrid) design. The digital power supply used in this system draws very little power when there is no signal present, thereby allowing Klipsch to eliminate adding a power switch. The lack of a headphone jack is a minor inconvenience at times when you don't want to disturb your neighbors. However, why would you use headphones with such a kick ass system anyway.