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JL Audio M8IB5-SG-TB

8.8" marine subwoofer (Black w/ Titanium "Sport" grille)

Item # 13697373

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

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

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5 questions - 5 answers

Item # 13697373

About the JL Audio M8IB5-SG-TB

Big performance and sharp styling

Designed to withstand the rigors of the marine environment, JL Audio's M8IB5-SG-TB 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 titanium finish and sport grille design make it a great addition to your boat's interior.

Big performance and sharp styling

Designed to withstand the rigors of the marine environment, JL Audio's M8IB5-SG-TB 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 titanium finish and sport grille design make it a great addition to your boat's interior.

JL Audio M8IB5-CG-TB 8.8" marine sub with titanium classic grille

This rugged sub is made for marine use.

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 will 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 titanium 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.
  • warranty: 2 years
  • Our 60-day money-back guarantee
  • MFR # 91373

What's in the box:

  • 8.8" Marine subwoofer
  • Titanium (gray) 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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More details on the JL Audio M8IB5-SG-TB

Pat M.

Product Research

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

Q
Crutchfield asked: Why did you buy this?
A
size constraints [ John  Aug 05, 2016 ]

5 questions already asked

Q
I have an MCS-81-B5-4-TB-BL that appears to be blown in a 2016 MasterCraft NXT. Is that a warranty item or easier to just buy new?
[ Chris  Jun 03, 2018 ]
1 answer
A
Factory warranty is 2 years, if yours falls in that window I would definitely send it in.
[ Manny  Jun 08, 2018 ]
Q
would this be a good choice to replace the factory rear sub-woofer on a Jeep 2013 Wrangler Unlimited into where the Alpine rear speaker enclosure is located?
[ Donnie  May 05, 2017 ]
1 answer
A
You will want to contact an Advisor by phone (1-800-324-9695) or online chat to discuss compatibility with your factory system. They will be able to pull up your vehicle and see if this will integrate. If it does not, then they will also be able to discuss other options with you.
[ Kenny  May 05, 2017 ]  Staff
Q
can this woofer be mounted in an empty waketower enclosure ?
[ thomas  Sep 18, 2016 ]
1 answer
A
If the enclosure is large enough to accommodate it, sure. The woofer can be used in a free-air mount but JL does recommend an airspace of 1.5 cubic feet when mounted in a sealed enclosure for optimum performance. I hope that helps. My Bio: http://www.crutchfield.com/Support/Bio.aspx?bio=5
[ Ryan  Sep 24, 2016 ]  Staff
Q
Can this woofer be fitted to 2013 Harley Davidson street glide bagger?
[ Jeryl  Jul 28, 2016 ]
1 answer
A
yes you can make it fit.you will be happy when you here it rocking!!!!!
[ MARK  Jul 29, 2016 ]
Q
mounting dimensions?
[ Roger  Dec 14, 2015 ]
1 answer
A
The Subwoofer requires a cutout hole that is 7.3" in diameter and has a mounting depth of 5.165". The subwoofer will protrude from the mounting surface 1.47". The Diameter of the magnet is 5.5" I hope that helps!
[ Ryan  Dec 17, 2015 ]  Staff
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