This Pioneer GM-D1004 is a Class D bridgeable 4-channel amplifier with a compact design, making it easy to mount or conceal in your vehicle. Despite its small size, it delivers up to 400 Watts of maximum output and 45 Watts per channel, significantly improving the performance of your factory or aftermarket speakers. It is also suitable for installations in motorcycles and ATVs. The amplifier features plug & play installation, distortion less than 0.05%, and can connect via speaker outputs of the OEM radio with automatic switch-on. Its frequency response ranges from 10-40,000 Hz. The compact size is comparable to a standard red brick and can easily fit behind short chassis digital media receivers, in glove boxes, or center consoles. Cables are included for installation. The power can be taken from the console panel thanks to its protection control system, which suppresses excess current during large output.