Year-End SaleEnds 1/1/26. Limited quantities. No rainchecks.

Skip to content
Main Content
product image

MB Quart - Reference Series 12" Dual-Voice-Coil 4-Ohm Subwoofer - Black

Model: RLP304
SKU: 4394368
This item is no longer available in new condition. See similar items below
  • Key Specs
    • RMS Power: 300 watts (The maximum amount of continuous power the device is able to handle.)
    • Peak Power Handling: 600 watts (The maximum amount of power an electronic device, like a speaker, can handle without damage. This refers to short bursts of power, while root mean square (RMS) power handling indicates the amount of continuous power a device can sustain. Higher levels of distortion can also occur at peak power levels when the device is powered beyond its recommended usage.)
    • Impedance: 4 ohms (Describes the resistance of an electric signal throughout the system. Devices with low impedance require less power to deliver optimal signals but are more at risk for damage from overloading. Higher impedance requires more power but is more protected from overload damage.)
    • Woofer Size: 12 inches
    • Woofer Composition: Polypropylene
  • General
    • Product Name: Reference Series 12" Dual-Voice-Coil 4-Ohm Subwoofer
    • Brand: MB Quart
    • Model Number: RLP304
  • Audio Power
    • RMS Power: 300 watts (The maximum amount of continuous power the device is able to handle.)
    • Peak Power Handling: 600 watts (The maximum amount of power an electronic device, like a speaker, can handle without damage. This refers to short bursts of power, while root mean square (RMS) power handling indicates the amount of continuous power a device can sustain. Higher levels of distortion can also occur at peak power levels when the device is powered beyond its recommended usage.)
  • Audio
    • Impedance: 4 ohms (Describes the resistance of an electric signal throughout the system. Devices with low impedance require less power to deliver optimal signals but are more at risk for damage from overloading. Higher impedance requires more power but is more protected from overload damage.)
  • Dimensions
    • Woofer Size: 12 inches
    • Cutout Diameter: 10.62 inches
    • Magnet Size: 40 ounces
    • Product Height: 12.38 inches (The out of box height of the item. Height is measured as the vertical distance from the bottom of the item to the top as it would be primarily used or placed.)
    • Product Width: 12.38 inches (The out of box width of the item. Width is measured as the horizontal distance from one side of the item to the other as it would be primarily used or placed.)
    • Product Depth: 4 inches (The out of box depth of the item. Depth is measured as the distance from the front of the item to the back as it would be primarily used or placed.)
    • Product Weight: 11.5 pounds (The out of box weight of the item.)
  • Design
    • Woofer Composition: Polypropylene
  • Enclosure
    • Enclosed: false
  • Other
    • UPC: 806576216483

Enjoy thunderous bass in your vehicle with this MB Quart Reference Series RLP304 dual-voice-coil subwoofer that features a 12" polypropylene thermal-formed cone to ensure dynamic audio. A shallow mounting depth facilitates installation.

  • Handles up to 600W peak power (300W RMS): For rich sound.
  • 25-160Hz frequency response: Delivers booming lows for an immersive soundscape.
  • 86dB sensitivity: Ensures robust audio.
  • 12" polypropylene thermal-formed cone: With UV-stable, foamed rubber surround offer enhanced bass response.
  • Dual 4-ohm voice coils: Provide efficient operation.
Whats Included
  • MB Quart Reference Series 12" Dual-Voice-Coil 4-Ohm Subwoofer
  • Owner's manual