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MB Quart NWF-254

10" Single 4 ohm Marine Subwoofer


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This item has been discontinued

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MB Quart NWF-254

10" Single 4 ohm Marine Subwoofer


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MB Quart brings us the latest in their marine speaker technology with the NWF 254. The fully marine certified subwoofer will provide the bass that you are looking for. The protective coating and sealing will guard this sub against any harsh nautical conditions that may occur. The NWF 254 from MB Quart. Get ready to rock the boat.

  • MB Quart Marine 10" Single 4 ohm Subwoofer
  • Power Handling:
    • Peak: 200 watts
    • RMS: 100 watts
  • Impedance: 4 ohms
  • Polypropylene cone
  • Nautic crossover with special protective sealing lacquer
  • Gold-plated terminals to resist corrosion
  • Sealed solder joints
  • Frequency response: 30-300 Hz
  • Sensitivity: 86 dB
  • 1-year warranty

Product History:

MB Quart NWF-254 thumbnail
(newest, current model)
MB Quart NWD-254 thumbnail
(previous model, replaced by MB Quart NWF-254)

Subwoofer Specifications

Subwoofer Size
Refers to the diameter of the subwoofer, measured in inches.
Subwoofer Design
This is the design of the subwoofer or the opening of the subwoofer enclosure. Each design has it's own benefits, whether it is a square, circle, or oval.

Round/Circle: This is the typical and common subwoofer design. They have a round cone and are a circle in design.

Square: These woofers are able to achieve a greater cone area in a smaller space. Because of the greater surface area, some square subwoofers will be louder than a round subwoofer of the same size.

Round / Circle
Main Cone Color
This is the color of the speaker's or subwoofer's cone.
Voice Coil(s)
Dual voice coil subs have more wiring flexibility than single voice coils subs; however, single voice coil subwoofers provide easier hookup options for wiring multiple subwoofers in parallel or series. You may also run a dual voice coil (DVC) sub in parallel, series, or combination. A quad voice coil has four voice coils and is equal to two dual voice coil subwoofers as far as wiring goes.
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
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.
200 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.
100 watts
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.
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).
30 - 300 Hz
Xmax (millimeters)
Typically measured in millimeters, the Xmax value is the measure of a speaker cone's maximum excursion in one direction while maintaining a linear behavior.
8.5 mm
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.
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.

Cutout Diameter
The actual diameter of the hole you will need to cut out if you are creating a new mounting location for this speaker, or if you are mounting a subwoofer in a box.
Recommended Enclosure Type
This is the recommended type of enclosure that the subwoofer should be installed into. Some subwoofers are specially designed for particular enclosures.

Sealed: These enclosures completely enclose the air inside the box. These boxes produce a tight bass.

Ported/Vented: These enclosures have a slot of air to escape from the box. The result is a sound that has more "boom".

Bandpass: These are a combination of both sealed and ported enclosures. They can be very efficient, but require tuning for the best response.

Subwoofer Grille
Most subwoofers are able to accommodate a universal grille; however, some subs include a grille and others have a specific, optional grille available for purchase separately. If "yes", then the subwoofer includes a grille. If "optional (sold separately)" the matching grille will need to be purchased in addition to the sub.
Yes - Included
Re-Cone Kit Available
Some higher end subwoofers have replaceable cone assemblies. In case of a blown woofer, a recone kit allows for a simple replacement, as opposed to purchasing an entire new subwoofer.
Amplified or Non-Amplified
This indicates if the subwoofer comes with an amplifier installed as one unit or Non-amplified which requires an external amp to power the subwoofer

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


Clermont, GA

MB Quarts did it again

June 26, 2014

When you think MB Quarts couldn't make anything else more awesome. For being as cheap as they are and how awesome they look, that is just the beginning. Got two of these and put them in two pro box enclosures. Put the MB Quart 710.5 amp on them and they hit so hard I have to keep the bass down unless I want to show it off. Awesome job

20 of 23 found this helpful

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Shelbyville, MI

Top of the line for an entry level price!

January 26, 2010

One of the cleanest sounding amps I have ever used. Installed over 15 of these last summer and never a complaint or service call, who could ask for more? highly recommend to anyone looking for the highest quality product, plus a great price.

20 of 24 found this helpful

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Clarksville, IA

Great Value!

October 11, 2012

Purchased this 6 months ago for my pontoon. With the assistance of my helpful Sonic Elec. rep I went with the Clarion deck, 2 MB quart marine amps, 2 pair of MB Quart 6.5's & 2 - 10" MB quart subs... this baby jams. No issues thus far, very happy with my purchase.

15 of 18 found this helpful

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Big Papa

Palm Beach, Fl.

MB Quart Marine NWF 254

November 13, 2010

Just installed a pair of these today along with two pairs of the NKF 116's. Wow...MBQ did not let me down! I was worried about the lower RMS ratings on both, but these truly crank with lesser power amps. I was worried about not having enough power...these speakers don't require it.
Crystal clear, just like MBQ's mid's/high's have long since been known for.
Now we just have to see how long they last on the boat/saltwater.

Almost forgot, thanks Sonic for the great C.S., fast shipping, great prices!!!

15 of 18 found this helpful

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Great Value

July 7, 2013

For the money no IB sub I have ever used can match the abuse this sub can take, feed it some power and it pounds

15 of 19 found this helpful

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MB Quart NKF 116 (Not the NWF 254)

October 25, 2010

Great stuff. I got shipped the Sony XS-MP1620W th same week my mistake and took a few minutes to compare both. The MB quart are more precise, and less distortion than the Sony's.

I kept the MB's, returned the Sony. Peak power was stronger too.

14 of 17 found this helpful

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Lisle, IL

Sounds fantastic

June 16, 2014

Top of the line subwoofer at a reasonable price! Installed on my boat last weekend and was finally able to dial my system in. Highly recommend this product.

13 of 18 found this helpful

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SW Florida

great sub for the money

December 12, 2013

can't believe the price on this, it's built and looks like a $300 sub. Heavier than I thought- the magnet is a brute. It sounds great in my boat with minimal amp- 100 watts rms, would buy again

11 of 15 found this helpful

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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 NWF-254