Memphis MJP1244 12" Dual 4-Ohm MOJO Pro Subwoofer

The Memphis MJP1244 is a 12-inch MOJO Pro car subwoofer designed for systems that need substantial low-frequency output from a conventional enclosure format. Its dual 4-ohm voice coil configuration gives installers wiring flexibility while supporting a single-subwoofer bass upgrade. With 750 watts RMS power handling, it is intended for use with a properly matched external amplifier.

This subwoofer is aimed at listeners building an SPL-oriented car audio system who want strong, forceful bass without moving to an unusually large or specialized enclosure. The rigid paper cone, double-stitched foam surround, and progressive spider are designed to support controlled cone movement. Its 85.68 dB sensitivity and 36.7 Hz resonant frequency provide a foundation for enclosure-based bass tuning.

Memphis uses DVVC Direct Vent Voice Coil Cooling and cross-drilled front-plate venting to help manage heat around the 2.5-inch voice coil. An aluminum shorting ring is used to reduce inductance. These engineering details support stable operation when the subwoofer is used within its rated power range.

The MJP1244 uses dual 4-ohm voice coils that can be wired to a 2-ohm parallel load or an 8-ohm series load. This makes it suitable for pairing with mono amplifiers that are stable at the selected final impedance. Confirm the amplifier's rated output at the chosen load before wiring the subwoofer.

For enclosure planning, Memphis recommends a 1.5 cubic-foot sealed box or a 2.5 cubic-foot vented box for one MJP1244. The vented recommendation uses a 5 by 5 inch port measuring 27 inches long and is tuned to 36 Hz. Its 6.23-inch mounting depth and 11.34-inch cutout diameter should be checked against the enclosure before installation.

Key Features

• Dual 4-Ohm Voice Coils Enables 2-ohm parallel or 8-ohm series wiring.
• 750W RMS Handling Supports properly matched high-power mono amplification.
• DVVC Cooling Direct venting helps manage voice-coil heat.
• 2.5-Inch Voice Coil Provides a substantial thermal and mechanical platform.
• Rigid Paper Cone Supports responsive bass output and cone stability.
• Diecast Basket Provides a rigid mounting structure for the motor.

Design & Installation

The MJP1244 combines a rigid paper cone, double-stitched foam surround, progressive spider, diecast basket, aluminum shorting ring, and single-sided compression terminals. Its 120-ounce magnet and 2.5-inch voice coil are paired with cross-drilled front-plate venting and DVVC cooling. The design is intended for high-SPL car audio applications while retaining compatibility with traditional subwoofer enclosures.

Install the subwoofer in a strong, sealed enclosure with at least 6.23 inches of mounting-depth clearance and an 11.34-inch cutout. Wire both 4-ohm voice coils correctly for either a 2-ohm parallel or 8-ohm series final load, then select an amplifier that is rated appropriately at that impedance. For a single-subwoofer system, use Memphis's recommended 1.5 cubic-foot sealed or 2.5 cubic-foot vented enclosure volume as the starting point.