Total System Frequency (in-room): 32Hz-20kHz
Maximum Acoustic Output: 106dB peak
Amplifier Headroom: 2 x 35 watts - Satellites, 1 x 130 watts - Subwoofer
Satellite Impedance: 4 ohms
Preamplifier Control Pod:
Subwoofer and Main volume level controls
LED Power indicator
MP3/Aux player line input with soundcard mixing function
Direct Path interface
Sealed elliptical two-way enclosure with 0.75" polymer dome tweeter mated to MicroTractrix Horn and 3" long throw mid-bass driver
Bass-reflex enclosure with front port and side-firing 6.5" long-throw driver; flared tuned port; sixth-order enclosure design.
Digital linear hybrid amplifier; discrete MOSFET output section
Protective limiter function protects the driver and amplifier from extremely high volume playback.
The satellites are 4.25 inches across, 6 inches deep, and are 9 inches high with stands. This makes the Klipsch satellites slightly larger than other multimedia satellites. The subwoofer is 10 inches tall, 10 inches wide, and 11 inches deep.
The new ProMedia 2.1 finally offers a headphone jack and an auxiliary input. The auxiliary input has a higher sensitivity than the standard input, which is very useful with the lower level outputs of portable music devices. The mixing function is also a nice novelty. When the headphones are plugged in, the satellites and subwoofer mute, and the volume control controls the headphone output. This is very useful especially if your computer is in a place where you can't always simulate Saturn V launches or military fire fights for fear of disturbing the neighbors. With 200 watts of power, 2.1 is only half as powerful as the ProMedia v.2 400, but that is like saying that a Porsche 911 Turbo is only half as fast as a commuter airplane.
The ProMedia v.2 400 advertises BASH technology in the amplifier, but we don't see the same claim here with the 2.1s, although both are digital hybrid designs.
I would take the frequency response numbers with a large grain of salt, as there is no published dB bound for the value. The upper bound of 20Khz is accurate, but a low end of 32Hz is a bit optimistic. This isn't a jab at Klipsch as very few speaker systems can go to 30Hz, and those that do often command four figure price tags. Nevertheless, Klipsch's bass response remains unmatched in the multimedia speaker market.
The original Klipsch ProMedia v.2 400 was often criticized for an excessively noisy pre-amplifier. This is Klipsch's compensation for the often insipid outputs of our sound cards. The ProMedia 2.1 does have some hissing at very high volumes, but not more than to be expected. A digital input for these speakers would have reduced this low-level noise.
Many had hoped for Klipsch to jump on the digital bandwagon and offer a digital input, but the ProMedia 2.1 is strictly an analog system, taking stereo mini-jack inputs.