The picture shows this Crown power amp installed in a rack paired with a bass guitar speaker below. Ignore the speaker and other items (unless you want a Crown powered bass amp). This ad is just selling the power amp for $250. I have several size and type racks available to install this power amp into if you like.
Here is a factory description:
The Crown CE 2000 2 Channel Power Amplifier amplifies your audio with pristine clarity, featuring a 4 ohm stereo (per channel) output of 660W and an 8 ohm stereo (per channel) output of 400W. This unit is also capable of bridge-mono operation, providing a formidable 1950W output on 4 ohms or 1320W on 8 ohms. The amplifier is equipped with an on/off rocker switch located on the front panel for easy operation and a detented rotary level control for each channel, allowing for precise audio adjustments.