Subwoofer Marinizado 8 Pol. 200W JL Audio M8IB5-CG-WH

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M-Series 8-inch Marine Subwoofer Driver for Infinite-Baffle Use (200 W, 4 Ω) - White 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 M-Series infinite-baffle woofers are designed to operate without a dedicated enclosure. Long excursion capability and rugged suspension systems help produce deep, powerful bass response that will transform your boat's audio system.


The M8IB5 is best used with amplifier power in the 50W - 200W range and is optimized to operate with just a large volume of air behind it (at least 1.5 cu. ft. / 42.5 l). If you prefer to use a dedicated enclosure, refer to one of the suggested designs located in the Specifications section for optimum performance.


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) 200 W

Nominal Impedance (Znom) 4 Ω


Physical Specifications

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

Net Weight 6.82 lb / 3.094 kg


*Frontal grille protrusion measured from mounting surface



Free Air Resonance (Fs) 53.37 Hz

Electrical “Q” (Qes) 0.833

Mechanical “Q” (Qms) 11.827

Total Speaker “Q” (Qts) 0.778

Equivalent Compliance (Vas) 0.57 cu ft / 16.00 L

One-Way Linear Excursion (Xmax)* 0.53 in / 14 mm

Reference Efficiency (no) 0.28%

Efficiency (1 W / 1 m)** 86.7 dB SPL

Effective Piston Area (Sd) 35.15 sq in / 0.0227 sq m

DC Resistance (Re) 2.958 Ω


* 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”.


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