JBL Stadium Marine M6520
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JBL Stadium Marine M6520 Plus One™ Woofer Cones - Image

Plus One™ Woofer Cones

Plus One cones provide more overall speaker-cone area than other cones in its class giving them higher sensitivity, increased low-frequency output and more distinguished musical character.

JBL Stadium Marine M6520 Convertible Design - Image

Convertible Design

To increase loudspeaker acoustics and installation versatility, the 8" (200mm) Marine Three-Way Convertible can be coaxially mounted or separated and installed as a component system. This is handy for working around placement option restrictions.

JBL Stadium Marine M6520 Perimeter Illumination - Image

Perimeter Illumination

Unique and eye-catching RGB illumination can display seven colors out of the box—or an almost unlimited number of colors when connected to an external lighting controller.

JBL Stadium Marine M6520 SSI (Switch-Selectable Impedance) - Image

SSI (Switch-Selectable Impedance)

New 10" (250mm) woofer features an exclusive dual impedance switch that lets you choose either 2- or 4-ohm load impedance option. SSI lets you reconfigure your system with the flip of a switch. (Not available from any other manufacturer.)

JBL Stadium Marine M6520 Mylar Tweeters with Integrated Grilles - Image

Mylar Tweeters with Integrated Grilles

Weather resistant tweeters deliver smooth highs and increased power handling for more natural sound from vocals, cymbals, horns and pianos. (Grill mounted tweeters allow the front of the woofer cones to be sealed.)

JBL Stadium Marine M6520 One-piece Polymer basket - Image

One-piece Polymer basket

The polymer basket is durable over time even after prolonged exposure to sun, salt and moisture. Rubber surrounds are more reliable than foam and offer better edge protection.

JBL Stadium Marine M6520 High Sensitivity - Image

High Sensitivity

A high sensitivity rating combined with above-average continuous power handling makes it one of the loudest boat speakers available without sacrificing clarity, fullness and musical character.

JBL Stadium Marine M6520 Voicing of Speakers - Image

Voicing of Speakers

Speakers are individually voiced to ensure they deliver JBL's true sonic signature. This means that specifications as well as speaker characteristics are considered when tuning and authenticating the signature JBL sound. This is part of the development process spearheaded by the leading transducer engineers in the world to provide the best listening experience at any price point.

JBL Stadium Marine M6520 Harman Standard Reliability Testing - Image

Harman Standard Reliability Testing

JBL speakers undergo a testing process that would destroy lesser speakers. JBL freezes them, bakes them, shakes them, blasts them with ultraviolet light and drives them at full power for days at a time.

JBL Stadium Marine M6520 JBL at an Affordable Price - Image

JBL at an Affordable Price

This is JBL—one of the most innovative and legendary companies in audio. JBL is one of the top-selling car speaker brands in the world—obviously, this is no coincidence. If you know audio, you know JBL in your car, your home—why not in your boat?

Specs & Downloads



Stay Clear, Get Loud, Go Deep.

JBL's Stadium Marine loudspeakers leverage JBL’s world class audio engineering and music reproduction with purpose-built marine loudspeakers that will survive the rigors of the harsh marine environment. Choose from the most popular sizes for boats and watercraft. The 6-1/2" coaxial, 8" three-way convertible speaker system and 10" woofer have Plus One™ polypropylene woofer and midrange cones, Mylar tweeter domes (Except Subwoofer), one piece cast polymer baskets, sealed magnets, and rubber woofer surrounds for high SPL performance. Wind, water or engine noise will not drown them out. Speakers are UV resistant in a marine grade IPX3 (IPX5 from front) weather resistant and include RGB perimeter illumination and go through 300 hours of salt spray testing. And they're ready to make amazing music on the water. Whether it's a daily scrub down, a picnic in a quiet cove or an all-out race across high swells, JBL has the right configuration for your craft.

General Specifications

Power Handling
100 watts RMS, 300 watts peak power
92dB at 2.83 volts
Frequency Response
40 - 25kHz
Voice Coil Diameter
1 in. (25.5mm)
3 ohm impedance

What's in The Box?

  • 2 x 6" (160mm) woofers, pr.
  • 12 x Screw
  • 12 x Speed clip
  • 1 x Spanner
  • 2 x Closed cell foam gasket
  • 2 x LED cable
  • 2 x JBL logo badge (Black)
  • 2 x JBL logo badge (Orange)
  • 1 x Owner's manual
  • 1 x RoHS sheet
What's in The Box?

Documents & Downloads

Reviews and Q&A

Customer Reviews

Rated 5 out of 5 by from They sound great & look great. Great addition to my boat. I installed them in the bow of my boat and they look great, sound quality is great also.
Date published: 2019-06-19
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Product Q&A

Why does the close up pic of the sticker on the back of the speaker say 50wrms, and 150w peak?

Asked by: Brando Yo
The power handling of our JBL Stadium Marine M6520 is 100Wrms 300W Peak.
Answered by: Jem at Customer Support
Date published: 2021-06-06

What are the dimensions of the entire speaker?

Asked by: Andrew T
Here are the dimensions of the speaker. External diameter 7-15/32” (189.4mm) Total depth 3-21/32” (92.5mm) And here are the measurements for mounting. Mounting cutout diameter 5-23/32” (144.8mm) Mounting depth 2-9/16” (65mm)
Answered by: Homer DLR
Date published: 2021-06-06

Is this a 6 1/2" Speaker? In the Features, it describes it as an 8" convertible design?

Asked by: David2019
Yes but it runs larger in performance with the plus one technology giving an inch more surface area. the 8" is the only one with the convertible or 3" removable tweeter.
Answered by: Prospec B
Date published: 2021-06-06

I have a XAV-AX7000 Sony head unit on my bike can I use MB6520 speaker with this head unit the speakers say 3 ohm and the amp says 4 ohm

Asked by: Omelet
Yes you can. Our speakers are designed to work with stocks 4 ohm headunits.
Answered by: Mario at Customer service
Date published: 2021-06-06

What size amp do I need to run a pair of the 8 inch version

Asked by: Tayway21
Our 8 inches JBL Marine speakers can handle up to 150Watts RMS. If you could get one JBL MA704 amplifier and bridge the outputs to create two 200Watts RMS of power at 4 ohms, it would be a great match since the amplifier won't have to work hard to provide power.
Answered by: Jem at Customer Support
Date published: 2021-06-06

Does this set come with speaker grills. Does not state it in box content.

Asked by: MKM24
We appreciate your time in reaching out. Our Stadium M6520 comes with a modern type integrated cover grill.
Answered by: Kris A
Date published: 2021-06-06
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