Kenwood KAC-820 is a stereo power amplifier designed for car audio systems. It features a maximum output power of 140 W per channel into 4 ohms, providing ample power for driving speakers. The amplifier has a wide frequency response ranging from 2 Hz to 100 kHz, ensuring accurate reproduction of audio signals.

The input sensitivity can be adjusted from 0.1 V to 5.0 V, allowing for compatibility with various head units. Additionally, the amplifier has a sub-woofer selector switch, enabling users to choose between 50 Hz and 100 Hz cutoff frequencies for subwoofer output.

The compact dimensions (200 x 60 x 300 mm) allow for flexible installation in various locations within a vehicle. The amplifier requires a 12 V negative ground power source and comes with necessary accessories like screws and spacers for secure mounting.