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MB Quart NKF-692 (Sport Grilles)

6x9" 2-Way NKF Series Coaxial Marine Speakers

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List price $159.99

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MB Quart Marine Series

MB Quart brings us the latest in their marine speaker technology with the NKF 692. The fully marine certified 6" x 9" speakers will provide the sound that you are looking for. The protective coating and sealing will guard these speakers against any harsh nautical conditions that may occur. The NKF 692 from MB Quart. Get ready to rock the boat.

Product Features:

  • 6" x 9" 2-way MB Quart NKF Marine Speakers
  • Power Handling:
    • Peak: 260 watts per pair / 130 watts each
    • RMS: 120 watts per pair / 60 watts each
  • Polypropylene cone material
  • 1" Titanium coated tweeter
  • Marine crossover with special protective sealing lacquer
  • Gold-plated terminals to resist corrosion
  • 4 ohms impedance
  • Voice-coils protected against direct water spray
  • Sealed solder joints prevents corrosion
  • For more info, read more in our blog
  • Top-mount depth: 3-1/4"
  • 1-year warranty

Speaker Specifications

This is the manufacturer product line of speakers.
Priced Per
Car Speakers are typically sold in pairs so you will receive 2 speakers for each speaker purchase on speakers marked "Priced Per Pair". If a speaker is marked "Priced Per Each" then the speaker is sold individually and each purchase you make will result in 1 speaker. High-powered tweeters, midrange and full-range pro audio for car speakers are typically sold per each speaker.
Speaker Size
Refers to the size of the speaker measured in inches. Every vehicle has standard application sizes. Please use our vehicle fitment guide for your vehicle's specific speaker sizes if you do not know them.
6" x 9"
The number of individual drivers in a car speaker. Speakers with 2 drivers are known as a 2-way, and 3 drivers are known as a 3-way. Component systems are often referred to as "separates" because the tweeter is not attached to the midwoofer (main speaker driver) and mounts separately in a location such as a door post. Component systems typically come with an external crossover so you can easily adjust the high and low frequencies sent to both the midwoofer and the tweeter. Center channel speakers are great for those looking to have surround sound in their vehicle.
Tweeter Design
Designs such as cone, dome, semi-dome, balanced dome, and whizzer are most popular. Cone tweeters are simple, efficient and typically are the most reasonably priced. Dome tweeters are used in most home speakers, and provide a smoother and more accurate sound. Semi-dome design is one with a dome placed inside a cone. A Balanced dome driver is a semi-dome with equal reproduction area given the cone and dome portions of the driver. A whizzer tweeter is a separate tweeter cone driven by the voice coil of the woofer.
Tweeter Size
Refers to the size of the tweeter. Typically, smaller tweeters produces less output with higher frequency response.
Tweeter Composition
Materials such as polypropylene, silk, cloth, and paper are the most common, where as many more recent tweeters are now manufactured with composites such as Aluminum, Titanium, Mylar, and other materials.

PEI is an acronym for "Polyetherimide" which is an amorphous, amber transparent, high-performance thermoplastic.

Woofer Composition
Lightweight woofer cone materials are essential for efficient operation. Poly cones produce exceptional sound and are sturdy against various changes in temperature. Paper cones are very efficient, and when treated for moisture resistance, will perform at a high level. Poly refers to polypropylene, which is thermoplastic or fibers that are polymers of propylene. IMPP refers to injection molded polypropylene, a commonly used process and material in speakers.
Woofer Surround
A speakers surround is part of the suspension system. The surround protects the cone and prevents it from being displaced as it flexes out from the basket. It is usually made of a durable material like treated foam or rubber in order to withstand the strenuous job of producing bass frequencies.
Butyl Rubber
Peak Power Handling
Peak power handling refers to the amount of power a speaker can handle during a brief musical burst. The RMS power range figure is a much more reliable rating for determining the speaker's power requirements. The Peak power handling specification is typically rated per speaker unless otherwise noted.
130 watts
RMS Power Handling
The RMS power is the amount of power the speaker requires to operate safely and properly. RMS Power Handling refers to the amount of power a speaker can handle on a continuous basis. We recommend powering your speakers or subwoofer with 80%-120% of its recommended RMS rating. The RMS power handling specification is typically rated per speaker unless otherwise noted.
60 watts
An efficiency or sensitivity rating tells you how effectively a speaker converts power into sound. The higher the number, the more efficient the speaker and the louder it will play with the same input power. An efficient speaker helps you maximize your available power. Most sensitivity ratings measure the speaker's output with 1 watt of input, 1 meter from the speaker. Some speakers' sensitivity is measured with 2.83 volts of input, instead of 1 watt.
Efficiency (1w/1m) is not an accurate indicator of a subwoofer's output capability and should not be used as a comparison to other speakers or subwoofers to determine which one is "louder".
86 dB
Frequency Response
The range of frequencies the speaker will reproduce (lowest frequency to the highest). Bigger is better, meaning the wider the range, the better. The optimal range is 20 - 20,000 Hz (which is the range of human hearing).
50 - 25,000 Hz
Impedance (Per Voice Coil)
The load value (in ohms) that the speakers present to the amplifier per voice coil - the amount of resistance to the current flow. This is a key specification as subs wired in parallel or low impedances can create problems with your amplifier and potentially void all warranties. We encourage you to ask our support department prior to purchase if you do not understand which impedance level will suit your application best.
4 ohms
Shallow Mount Installation
This means that the subwoofer/speaker is designed to be installed in areas that do not have a lot of space. Shallow mount subwoofers are typically found under a seat or behind the seat in some trucks.

Shallow mount speakers will typically have a mounting depth of 2" or less, while shallow mount subwoofers will typically have a mounting depth of 3" or less.

Top-Mount Depth
The depth when installed on top of the mounting surface. Measured from the bottom of the speaker's magnet to the bottom of the mounting holes on the rim of the speaker.
Cutout Dimensions
Refers to the dimensions of the hole, measured in inches, required to contain the speaker.
Cutout Dimensions
Refers to the dimensions of the hole, measured in inches or millimeters, required to contain the speaker.
8-1/2" x 5-7/8" 
Speaker Grilles
A grating or screen of metal or plastic bars or wires, mounted in front of a speaker as protection. If yes, the speakers will include matching speaker grilles. If no, there are no grilles included.
Number of Speakers
This is the number of speaker that is included in the package. Each purchase will result in receiving the number of speakers indicated here. Please note that some items will have multiple woofers in the same enclosure. For sets of component speakers, this number will refer to the number of sets of speakers (For example, 2 would indicate the purchase includes 2 woofers and 2 tweeters).

Please refer to the product image and description for further details about the speaker.

Specials with this Item

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Warranty and Return Policy

Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
4 Star
3 Star
2 Star
1 Star

Average Attribution Rating



Buy these speakers!!

February 14, 2012

Great speakers. They live up to their reputation.

15 of 26 found this helpful

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Vancouver, WA

Awesome quality for the money

September 17, 2013

These speakers have excellent sound quality and range.
Everything you play on these comes out crystal clear even over the noise of the wind, water, and the engine.
The price being so cheap makes it an even better buy.

11 of 20 found this helpful

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October 2, 2011

I bought these for my rebuilt bayliner, I install custom stereos in vehicals for a living and have always been impressed by mb quart for the quality that they represent at the price that they are.
These particular speakers sound fantastic, coupled to a high power head unit they have no trouble producing great mids and very clean highs, even though i originally installed these without an amp or sub to take the load out of the low range freq's, they did not really struggle, they were certainly better than the kickers that i replaced these with.
After installing an amp and a sub, these have amazing sound, i have had these installed for about a year now and have not had any problems at all. match these with the 6 1/2's, the 6ch amp and the mb 10" sub and honestly you will not be able to fault the sound at all.


13 of 24 found this helpful

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saratoga, n.y.

Awsome purchase

September 27, 2011

Mb Quart has been the bust choice I've made for my boat, I've had many different brands, paid more money, an all have been less quality and didn't hold up as long as the MB Quart. Performance is awsome, well worth the money.

11 of 20 found this helpful

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Fort Lauderdale, Fl.

Great value and performance

June 21, 2010

Buying marine speakers is difficult without listening first. I always put MB Quart speakers in all of my Porsches. I couldn't resist the low prices
and quality reputation. I bought the rounds
and the 6 x 9, had them installed with a high
power head unit, and they sound great. Very
attractive grills, perfect mounting template, even
comes with quality wire. Two thumbs up!

12 of 22 found this helpful

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Fort Lee, VA

Great Value

May 9, 2014

the speakers work great and were a good price have not exposed them to weather yet but should do well

10 of 20 found this helpful

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marin, Ca

great sound

June 22, 2011

just put them in my boat they sound great and look great. cant beat it for the price

9 of 18 found this helpful

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Fort Myers ,Fl.

great value

March 1, 2011

Sounds good lasts long outside

9 of 18 found this helpful

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Dania beach, Florida

MB Quart NKF 692

October 18, 2009

Overall I am not very happy with these speakers. These are the new version of the NKA 169, which in my opinion were much better. The NKF 692's dont seem to sound as good. I have a pair of them in the front of my boat and a pair of the NKA's in the back. You can definitely tell the difference. Also, the metal grill over the tweeter started to rust within a few weeks and drip rust down the front of the speaker. Not sure why they changed the speaker design.
On another note, the speakers are still good compared to other marine speakers. if I didn't have the old ones, I might not have anything bad to say, other than the rust issue. I would rate the original NKA's with 5's all the way across.

10 of 21 found this helpful

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Vacaville, ca

Awesome speakers!

September 22, 2013

I bought these to run as tower speakers on my boat as the old ones were getting a little sun damaged. I ended up wiring them up in series/parallel to power the 4 tower speakers and the 4 lower speakers on the same amp. Boy what a difference!!! They sound very clear and can easily be heard 75' back on the wake board. I would definitely buy again and recommend to a friend.
I guess my only con would be that the grills are a little bigger than a standard 6x9 and on a tower application where the speakers are fairly close together, they wouldn't fit without some trimming done to sides of the grill.

10 of 23 found this helpful

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Great value great service

September 10, 2014

Speakers arrived on time. They were nicely packaged and I had absolutely no problems. I also ordered boxes for them and they were exactly as described. They look great! I looked at all the reviews before buying and was not disappointed. I will order other products in the future.

I haven't had the chance to use them too much, which is the reason for the low score on "durability". They look well made, but only time can tell.

9 of 23 found this helpful

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Accessory Tools and Products

Accessories added

Streetwires 25 ft. of True Spec 12 Gauge Speaker Wire

You need speaker wire to connect your speakers!

Your Price $44.95

Belva 23 ft. of True Spec 12 Gauge Speaker Wire

100% Copper Clad Aluminum, high strand count with ultra-flexible PVC blended jacket for easy installation

Your Price $14.99

12-10 AWG Butt Connectors

These yellow butt connectors are ideal when connecting thicker speaker wire your new aftermarket speakers.

Your Price $6.99

12-10 AWG Yellow T-Tap Adapters

Allows for fast and easy splicing of wires by easily tapping into the cable.

Your Price $4.49

12-10 AWG Quick Disconnect Connectors

These yellow quick disconnect connectors make it easy to connect and disconnect speaker wire your to your new aftermarket speakers!

Your Price $6.99

NVX SDSK2 Speaker Kit

Eliminates speaker panel distortion and reduces vibration, rattles, and squeaks!

Your Price $14.99

Dynamat Xtreme Speaker Kit 10415

Enough sound dampening for 2 speakers!

Your Price $17.95

Stinger Roadkill Speaker Kit

Use this to eliminate rattle from your speakers!

Your Price $13.99

Car Stereo and Speaker Installation Tool Kit

Includes Test Light, Crimp/Splice Tool, Multi-bit Screwdriver and more.

Your Price $16.99

Universal Wire Puller & Grabber

Running wires has never been easier! This wire puller allows you to run wires through those hard to reach places!

Your Price $6.99

Xscorpion 9-Piece Nylon Plastic Pry and Chisel Tool Set

Easily removes dash/trims, door clips, panels and pins, rubber grommets and vehicle emblems.

Your Price $14.99

Xscorpion WDCR2 Window and Door Clip Remover

Removes and installs handle and window crank clips.

Your Price $6.99

NVX SDRLR1 Sound Dampening Rubber Roller

Install your Sound Dampening with ease! This heavy duty rubber roller is designed specifically to install your NVX products!

Your Price $7.99

Xscorpion USP-69 6" x 9" Speaker Baffles

Enhance the sound of your speakers with these easy to install speaker baffles.

Your Price $5.99

Browse 2 questions and 2 answers
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Why did you choose this?
Sonic Electronix Store
A friend bought a couple items from you/this site. He was satisfied.
Matthew M on Aug 9, 2014
can I return these if there is a problem?
A shopper on Aug 7, 2014
Best Answer: Yes you can. You can read about our return policy here:
Reply · Report · Julia CStaff on Aug 7, 2014
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Product Summary


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Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: MB Quart NKF-692 (Sport Grilles)