Memphis MX800.4 IP66 4-Channel Powersports Amplifier

The Memphis MX800.4 is a compact four-channel powersports amplifier designed to add substantial, configurable amplification where mounting space is limited. It is suited to side-by-sides, ATVs, motorcycles, and other applications that need four amplified speaker channels. Its IP66-rated enclosure and protected connection design support installation in exposed powersports environments.

At 4 ohms, the MX800.4 supplies 125 watts RMS to each of four channels; at 2 ohms, it supplies 200 watts RMS per channel. It can also bridge channel pairs for 400 watts RMS x 2 at 4 ohms. This flexibility allows it to power a four-speaker system or support a mixed speaker-and-subwoofer layout when properly matched.

Class D amplification helps the MX800.4 deliver high output from a small chassis measuring 8.35 x 4.35 x 1.75 inches. Its 10 Hz to 20 kHz frequency response supports full-range speaker applications as well as filtered system configurations. Independent front and rear sensitivity controls help match the amplifier to the source unit and connected speakers.

The amplifier uses conformal-coated circuit boards, sealed connectors, and a water-resistant cover over its top-mounted controls. These details are intended to help protect key electronics and make adjustments accessible after installation. A status LED provides a visual operating indication, including protection status.

Both preamp-level and speaker-level inputs are provided, making the MX800.4 usable with many aftermarket and factory-style source units. Its 2-channel/4-channel input switch can route a two-channel source to all four amplifier channels or keep front and rear inputs independent. Built-in high-pass, low-pass, and full-range crossover selections help tailor each channel pair to the speakers being used.

Key Features

• Four-Channel Class D Design: Delivers efficient amplification for four speakers or bridged system configurations.
• IP66-Rated Chassis: Supports use in installations exposed to dust and water spray.
• Conformal-Coated Board: Adds environmental protection for the amplifier's internal circuit board.
• High- And Low-Level Inputs: Connects to RCA-equipped radios or speaker-level source outputs.
• 2CH/4CH Input Switch: Allows a two-channel source or independent front and rear inputs.
• Selectable Crossovers: Provides high-pass, low-pass, or full-range operation for each channel pair.

Design & Installation

The MX800.4 combines a compact chassis with sealed connectors, attached input/output pigtails, and a protected top control panel. Its conformal-coated board and IP66 rating are intended for powersports installations where weather, dust, and vibration are practical considerations. The control cover can be removed for access to the amplifier's adjustment switches and sensitivity controls.

Mount the amplifier securely in a location that allows access to the top controls and avoids direct heat exposure. Match connected speakers to the amplifier's 2-ohm minimum stereo impedance or 4-ohm minimum bridged impedance, and use the appropriate crossover mode for the speaker type. The package includes signal, speaker, and power/ground/turn-on harnesses, while the manufacturer identifies the Memphis 8GKIT as the recommended amplifier kit.