Main Content

JL Audio 8" M-Series Titanium Classic Grille Marine Subwoofer Driver - 91725

Abt Model: M8W5CGTB | UPC: 699440937252
In Stock
Color: Titanium
Your Shipping Zip Code: Add Location
Why I Bought This
See all buyer comments
  • Customer Service
    Customer Service
    Our award-winning experts are available to answer any questions at 800-914-2061 or live chat
    Learn More
  • Free Tech Support
    Free Tech Support
    Even beyond the sale and will continue to be by your side, whenever you need us.
    Learn More
  • Low Price Guarantee
    Low Price Guarantee
    We strive to give our customers the best service and pricing available anywhere.
    Learn More

Product Details

JL Audio 8" M-Series Titanium Classic Grille Marine Subwoofer Driver - M8W5-CG-TB

M-Series 8-inch Marine Subwoofer Driver for Enclosed Use (200 W, 4 Ω) - Titanium Classic Grille
With appropriate system setup, the addition of a subwoofer allows your smaller main speakers to be free of the burden of reproducing low frequencies. This allows your whole system to play louder and to sound cleaner at all listening levels.
Purpose-engineered and built for real marine duty, the M8W5 subwoofers are designed to operate in a compact sealed enclosure. Long excursion capability and rugged suspension systems help produce deep, powerful bass response that will transform your boat's audio system.
The M8W5 is best used with amplifier power in the 75W - 200W range and is optimized to operate in a compact 1.0 cu. ft. (28.3 l) sealed enclosure, or a 1.25 cu. ft. (35.4 l) ported enclosure. Detailed enclosure recommendations can be found in the "Specifications" tab. If you need a subwoofer driver that operates without a dedicated enclosure, select one of our Infinite Baffle Subwoofer Drivers instead.
Like all JL Audio marine speakers, this driver is built to withstand a real saltwater marine environment and deliver years of listening enjoyment.


  • Dynamic Motor Analysis - DMA Optimized Motor
    JL Audio's proprietary Dynamic Motor Analysis system is a powerful suite of FEA-based modeling systems, first developed by JL Audio in 1997 and refined over the years to scientifically address the issue of speaker motor linearity. This leads to vastly reduced distortion and faithfully reproduced transients... or put simply: tight, clean, articulate bass.
  • Marine Materials / Testing Summary
    The design of marine products requires extensive materials testing to achieve reliability and longevity.
  • Built in U.S.A. with Global Components
    JL Audio's Miramar, Florida loudspeaker production facility is one of the most advanced in the world.
  • Material Used
    • Injection-molded mica-filled polypropylene cone bodies with synthetic rubber surrounds, specifically formulated with UV inhibitors for marine duty.
    • Marine-grade, synthetic fiber spiders with progressive roll designs to withstand high humidity.
    • Specifically engineered polymer baskets are corrosion and UV-resistant and encapsulate the woofer's motor system to prevent corrosion.
    • Gold-plated, marine-grade brass connection terminals
    • Marine-grade stainless steel mounting hardware is included.



  • Continuous Power Handling (RMS): 200 W
  • Nominal Impedance (Znom): 4 Ω

Physical Specifications

  • Driver Displacement: 0.032 cu ft / 0.91 L


  • Free Air Resonance (Fs): 40.53 Hz
  • Electrical “Q” (Qes): 0.676
  • Mechanical “Q” (Qms): 13.11
  • Total Speaker “Q” (Qts): 0.643
  • Equivalent Compliance (Vas): 0.85 cu ft / 24.07 L
  • One-Way Linear Excursion (Xmax)*: 0.53 in / 14 mm
  • Reference Efficiency (no): 0.28%
  • Efficiency (1 W / 1 m)**: 85.8 dB SPL
  • Effective Piston Area (Sd): 35.15 sq in / 0.0227 sq m
  • DC Resistance (Re): 3.147 Ω
  • Notes:
    • * 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”.

Sealed Enclosure Specifications

  • Wall Thickness: 0.75"
  • Front Baffle Thickness: 0.75"
  • Volume (net int.): 1.00 cu ft / 28.3 L
  • External Width (W): 16"
  • External Height (H): 14"
  • External Depth (D): 11.375"
  • F3: 46.51 Hz
  • Fc: 55.13 Hz
  • Qtc: 0.8746

Ported Enclosure Specifications

  • Wall Thickness: 0.75 in"
  • Front Baffle Thickness: 0.75 in"
  • Volume (net int.): 1.25 cu ft
  • External Width (W): 16 in"
  • External Height (H): 14 in"
  • External Depth (D): 14.25 in"
  • Internal Port Diameter (ID): 3in"
  • Port Length (L): 10.25 in"
  • Tune to: 35 Hz
  • F3: 31.51 Hz

Approximate Dimensions:

  • Nominal Diameter: 8.0 in / 200 mm
  • Overall Diameter (A): 8.8 in / 224 mm
  • Bolt Hole Circle Diameter (B): 7.97 in / 202 mm
  • Motor Outer Diameter (C): 5.50 in / 140 mm
  • Frontal Grilles Protrusion* (D): 1.45 in / 37 mm
  • Mounting Hole Diameter (E): 7.375 in / 187 mm
  • Mounting Depth (F): 5.18 in / 132 mm
  • Driver Displacement: 0.032 cu ft / 0.91 L

Approximate Weight:

  • Unit: 6.82 lbs
  • Shipping: 10 lbs

Warranty Information:

  • Manufacturer Warranty (authorized online retailer): 2 Years Parts and Labor
California customers: Proposition 65 WARNING

Downloadable Resources

Key Features

200 Watts Continuous Power Handling (RMS)/ 4 Ohms Nominal Impedance (Znom)/ 86.7 dB SPL Efficiency (1 W / 1 m)*/ 5.18" Mounting Depth/ Designed To Operate In A Compact Sealed Enclosure/ Purpose-Engineered And Built For Real Marine Duty/ Built To Withstand A Real Saltwater Marine Environment/ Titanium Classic Finish

More reasons to buy the JL Audio 8" M-Series Titanium Classic Grille Marine Subwoofer Driver 91725 from Abt Electronics

  • is an authorized dealer.
  • The JL Audio 8" M-Series Titanium Classic Grille Marine Subwoofer Driver 91725 is Brand New.
  • Abt ships this product for free!


Size (inches)8
RMS Power Handling200 Watts
Impedance (ohms)4
LED LightingNo


Questions & Answers