Memphis MJP844 MOJO Pro 8" Dual 4-Ohm Subwoofer

The Memphis MJP844 is an 8-inch MOJO Pro car subwoofer built for systems that need substantial bass output from a compact driver. Its dual 4-ohm voice-coil configuration gives installers useful wiring flexibility when matching the subwoofer to a compatible amplifier. It is intended for a properly designed enclosure and an external car-audio amplifier.

This model is designed around high-SPL use, making it a practical choice for listeners who prioritize strong bass impact and system output. The 750-watt RMS rating provides the key power target for amplifier selection and gain setup. Its 1,500-watt peak rating describes short-duration power handling rather than the continuous amplifier-matching target.

The MJP844 uses a 2.5-inch voice coil with Memphis DVVC Direct Vent Voice Coil Cooling. Cross-drilled front-plate venting supports airflow around the motor structure during demanding use. An aluminum shorting ring is included to reduce inductance.

Its moving assembly combines a rigid paper cone with a double-stitched foam surround and progressive spider. These components are supported by a die-cast basket designed to provide a stable mounting structure. Single-sided compression terminals provide the connection points for the dual voice coils.

With a 7.3-inch cutout requirement and 5.6-inch mounting depth, the MJP844 can be planned into custom compact bass systems where space is limited. The dual 4-ohm coils can be wired for either a 2-ohm parallel load or an 8-ohm series load. Pair it with an amplifier that is stable at the chosen final impedance and set up for approximately 750 watts RMS of clean power.

Key Features

• 750W RMS Power Handling: Supports amplifier matching around 750 watts of continuous power.
• Dual 4-Ohm Voice Coils: Allows 2-ohm parallel or 8-ohm series wiring.
• DVVC Cooling: Direct venting helps manage voice-coil heat under use.
• 2.5-Inch Voice Coil: Provides a substantial thermal platform for this compact subwoofer.
• Rigid Paper Cone: Forms the primary diaphragm for low-frequency reproduction.
• Die-Cast Basket: Provides a rigid foundation for the motor and suspension.

Design & Installation

The MJP844 combines a rigid paper cone, double-stitched foam surround, progressive spider, die-cast basket, and 105-ounce magnet structure. Its motor includes a cross-drilled front plate, DVVC cooling, and an aluminum shorting ring. Single-sided compression terminals are used for speaker-wire connections.

Plan for a 7.3-inch cutout and at least 5.6 inches of mounting depth before building or purchasing an enclosure. Wire both 4-ohm coils correctly to reach either a 2-ohm parallel or 8-ohm series final load, and verify that the amplifier supports that load. Use an external amplifier, enclosure, appropriate wiring, and careful gain adjustment for a complete installation.