The Kenwood eXcelon X303-4 is a compact yet powerful 4-channel Class-D amplifier engineered to deliver clean, dynamic sound while fitting into tight installation spaces. Designed for modern car audio systems, the X303-4 delivers impressive efficiency, High-Resolution Audio certification, and flexible crossover controls for a premium listening experience. Perfect for powering aftermarket door speakers, component systems, or bridging channels for added output, this amplifier combines compact size with serious performance and reliability. Features Compact Class-D 4-channel amplifier High-Resolution Audio Certified Variable High-Pass & Low-Pass Filters Bridgeable channel design Bass Boost control Signal sensing turn-on Speaker-level input compatibility Efficient low-heat operation Compact footprint for tight installs eXcelon performance and reliability Specifications Max Power Output: 600 Watts RMS Power @ 4 Ohms: 50W x 4 RMS Power @ 2 Ohms: 75W x 4 Bridged RMS Power: 150W x 2 Amplifier Class: Class-D Frequency Response: 20Hz – 50kHz Signal-to-Noise Ratio: 100dB Fuse Rating: 30A x 2 Operating Voltage: 11V – 16V Dimensions: Width: 8-3/8” Height: 2-1/16” Depth: 5-7/8” Weight: 3.1 lbs