The Audison SR 4.500 is a 4-channel car amplifier designed to provide powerful and clean audio reinforcement for your vehicle's sound system. Built with Audison D-Class Technology (ADT), it delivers a total RMS power of 880 W, offering significant flexibility in configuration. You can run it in a 4-channel setup providing 130 W per channel at 4Ω, or switch to a 3-channel mode to power two speakers and a subwoofer with 480 W. For those needing maximum punch from fewer sources, it can be bridged into 2 channels delivering 450 W each at 4Ω. Its physical construction features an extruded aluminum chassis that manages heat through fanless convection cooling via side heat sinks, ensuring silent operation. The unit is relatively compact, measuring 264 mm in length and 47.5 mm in height, and weighs 2.12 kg. To make installation easier, it includes both low-level RCA and high-level speaker inputs, along with a Universal Speakers Simulator (USS) that allows it to integrate smoothly with factory audio systems by simulating speaker loads. This amplifier is well-suited for enthusiasts who want to customize their audio layout, thanks to the All Channels Driven design and adjustable filters ranging from 50 to 3200 Hz. With a signal-to-noise ratio of 105 dBA and a wide bandwidth of 10 Hz to 35 kHz, it maintains high fidelity across the entire audible spectrum. The inclusion of a bass boost on the B channels makes it a practical choice for those adding a dedicated subwoofer to their cabin.