The FPX4.800 is a compact 4-channel Class D car audio amplifier that delivers 4×120 Watts RMS at 4 Ohms. It is designed to power front and rear speaker drivers or a 2-way front kit plus a subwoofer when configured appropriately.

The amp offers selectable 4-/3-/2-channel modes, 2-/4-channel input modes for compatibility with head units that have only a pair of output lines, and an active crossover for each pair of channels. Its compact footprint measures 23.7 x 13.2 x 5.3 cm for flexible installation.