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JL Audio M8IB5-SG-WH

8.8" marine subwoofer (White w/ "Sport" grille)

Item # 13691372

Designed to withstand the rigors of the marine environment,JL Audio's M8IB5-SG-WH marine subwoofer brings big bass...

Designed to withstand the rigors of the marine environment,JL Audio's M8IB5-SG-WH marine subwoofer brings big bass...

Discontinued item

Item # 13691372

About the JL Audio M8IB5-SG-WH

JL Audio Built In USA Big bass and bold styling

Designed to withstand the rigors of the marine environment,JL Audio's M8IB5-SG-WH marine subwoofer brings big bass and subtle style to your boat, and its unique size makes it a great fit on most boats. The free-air design allows you to install it in a bulkhead or another suitable spot, or you can use a large sealed enclosure. Add it to your existing system, or use it in conjunction with JL Audio's marine speakers to create a powerful sound system that will rock the waves.The bright white finish and sporty grille design make it a great addition to your boat's interior.

JL Audio Built In USA Big bass and bold styling

Designed to withstand the rigors of the marine environment,JL Audio's M8IB5-SG-WH marine subwoofer brings big bass and subtle style to your boat, and its unique size makes it a great fit on most boats. The free-air design allows you to install it in a bulkhead or another suitable spot, or you can use a large sealed enclosure. Add it to your existing system, or use it in conjunction with JL Audio's marine speakers to create a powerful sound system that will rock the waves.The bright white finish and sporty grille design make it a great addition to your boat's interior.

JL Audio M8IB5-SG-WH 8.8" Marine sub with white sport grille

JL Audio built this sub to give you years of service.

Made in USA

Built in JL Audio's Florida factory, this powerful sub uses a marine-grade synthetic fiber spider, injection-molded polypropylene cone, and synthetic rubber surround to withstand the corrosive effects of sun, salt, and spray. A UV-resistant polymer basket protects the entire structure, and special UV protection ensures that the grilles with still look factory-fresh, even after years of sun exposure. As an added bonus, you're protected by JL Audio's 2-year warranty.

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Product highlights:

  • 8.8" 4-ohm marine subwoofer with white sport grille
  • injection-molded mica-filled polypropylene woofer with synthetic rubber surround
  • Centrex polymer basket and grille, with stainless steel back plate
  • gold-plated marine-grade brass binding posts
  • marine-grade synthetic fiber spider
  • suitable for free air use
  • power range: 50-200 watts RMS (500 watts peak power)
  • sensitivity: 86.7 dB
  • top-mount depth: 5-1/8"
  • sealed box volume: 1.50 cu.ft
  • comes with 6 grille logo badges (2 red/ 2 black/ 2 gray)
  • warranty: 2 years
  • Our 60-day money-back guarantee
  • MFR # 91372

What's in the box:

  • 8.8" Marine subwoofer
  • White polymer grille
  • Six 1-1/2" Stainless-steel screws
  • 6 Stainless-steel flat washers
  • 6 Grille logo badges (2 Red/ 2 Black/ 2 Gray)
  • Owner's manual

Customer reviews

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Features

Marine Tested: JL Audio's marine subwoofers are subjected to ultraviolet testing chambers (to simulate years of sun exposure) and salt fog chambers (to simulate years of exposure to salt-water environments). Marine-grade stainless steel mounting hardware is included.

Construction: The 8.8" subwoofer features an injection-molded, mica-filled polypropylene cone with a synthetic rubber surround specifically formulated with UV inhibitors for marine use. Marine-grade, synthetic fiber spiders withstand high humidity. The polymer baskets are corrosion and UV-resistant and encapsulate the sub's motor system to prevent corrosion.

Dynamic Motor Analysis (DMA): DMA is JL Audio's proprietary method of improving dynamic motor behavior. As a result of DMA optimization, the subwoofer's motor remains linear over a long excursion range, and also maintains a stable fixed magnetic field in the gap over a wide power range. The result is reduced distortion, faithfully reproduced transients, and tight, clean, articulate bass.

Infinite-Baffle Operation: The M8IB5 is optimized for infinite baffle operation so that it can be installed in a variety of locations, without the need for a dedicated enclosure. If an enclosure is used, 1.5 ft³ is the minimum recommended volume.

Polymer Basket And Grille: The UV-resistant polymer basket and grille are corrosion and UV-resistant, protecting the subwoofer and encapsulating the motor assembly to prevent corrosion. If the sub is mounted without the grill, the mounting height is 1.065 inches.

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Customer Q&A

3 questions already asked

Q
I'm looking to add to my boats speaker system. I currently have 4 6.5" JL and one 10" sub. Which of the JL 8.8" are the best fit for my application?
[ jason  Feb 22, 2018 ]
1 answer
A
I have a 270 1985 searay sundacer. The only place I could mount this was on the side of my seat. I reinforced the seat wall and it doesn't sound good. It likes to baffle. I guess if you have a nice rigid place to mount this it may be alright. I'm using an infinity kappa 12 in my aft cabin and that rocks compared to the JL audio. Hope this helps you.
[ STEPHEN  Feb 23, 2018 ]
Q
What's the best amp for two of the m81b5-sg-wh 8.8" speakers ?
[ Johnny5  Sep 20, 2015 ]
1 answer
A
Thanks for your question. For information on selecting the best amp for your subs I would recommend reaching out to an Advisor by phone (1-800-324-9695) or online chat. They will be able to help determine the differences between the amp models and help you make the best choice for your system.
[ Krissy  Sep 20, 2015 ]  Staff
Q
Do I need a amp to power it?
[ Justin  Apr 15, 2015 ]
1 answer
A
Most definitely. I have both the 8" and a 10" sub on my boat, and they love power. they provide very clean and tight bass, but you'll want an amp with sufficient wattage to keep this subwoofer happy. If you have the room for a 10" you should consider it. One thing I do recommend...depending on where you intend to mount this speaker, you might consider the version with the traditional grille. The sport grill looks cool, but it does the leave the sub a bit more vulnerable to both water and physical damage. mine is tucked away nicely, but if your install location is in an open area of your boat you might give this some thought.
[ Wells  Apr 17, 2015 ]

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