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Discontinued Product

JL Audio 12" M-Series Marine Subwoofer Driver - 91639

Product Details

JL Audio 12" M-Series Titanium Marine Subwoofer Driver - 91839


  • M-Series 12-inch Marine Subwoofer Driver for Infinite-Baffle Use (600 W, 4 Ù) - Titanium Classic Grille
  • Engineered as the reference standard for marine subwoofer performance, the M12IB6 is capable of producing staggering amounts of jaw-dropping bass in infinite-baffle applications.
  • Built to withstand real-world marine duty, this M12IB6 is designed to operate without a dedicated enclosure. It boasts a monstrous 4-inch voice coil and rugged suspension system to deliver outstanding linear excursion for high output and power handling.
  • The M12IB6 is best used with amplifier power in the 200W – 600W range and is optimized to operate with a large volume of air behind it (at least 3 cu. ft. / 84.95 l).
  • Like all JL Audio marine speakers, this driver is built to withstand a real saltwater marine environment and deliver years of listening enjoyment.


General Specifications

  • Continuous Power Handling (RMS): 600 W
  • Nominal Impedance (Znom): 4 ohms


  • Free Air Resonance (Fs): 35.34 Hz
  • Electrical "Q" (Qes): 0.856
  • Mechanical "Q" (Qms): 10.389
  • Total Speaker "Q" (Qts): 0.791
  • Equivalent Compliance (Vas): 1.99 cu ft / 56.35 L
  • One-Way Linear Excursion (Xmax)*: 0.73/ 18.5 mm
  • Efficiency ( 1 W / 1 m)**: 86.7 dB SPL
  • Effective Piston Area (Sd): 80.54 sq in / 0.052 sq m
  • DC Resistance (Re): 3.543 Ohms

Enclosure Specifications

  • Infinite Baffle Use: Yes (preffered)
  • Min. Sealed Enclosure Volume: 2.0 cu ft / 56.6 L (or larger)
  • Optimum Sealed Enclosure Volume: 3.0 cu ft / 70.8 L

Approximate Dimensions:

  • Overall Diameter: 14"
  • Nominal Diameter: 10"
  • Mounting Hole Diameter: 12.06"
  • Bolt Hole Circle Diameter: 12.81"
  • Motor Outer Diameter: 8.84"
  • Mounting Depth: 8.05"
  • Driver Displacement: 0.153 cu ft

Approximate Weight:

  • Unit: 23.8 lbs
  • Shipping: 30 lbs


* Xmax specifications are derived via one-way voice coil overhang method with no correction factors applied.
** Efficiency (1 W / 1 m) is not an accurate indicator of a subwoofer’s output capability and should not be used as a comparison to other subwoofers to determine which one is “louder”.

California customers: Proposition 65 WARNING - learn more
Key Features
Titanium Classic Grille/ Engineered As The Reference Standard For Marine Subwoofer Performance/ 4-inch Voice Coil/ Driver Built To Withstand A Real Saltwater Marine Environment/ Delivers Outstanding Linear Excursion For High Output And Power Handling/ Titanium Finish
More reasons to buy the JL Audio 12" M-Series Marine Subwoofer Driver 91639 from Abt Electronics
  • is an authorized dealer.
  • The JL Audio 12" M-Series Marine Subwoofer Driver 91639 is Brand New.
  • Abt ships this product for free!