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Polk Audio MM1240DVC

425W 12" Mobile Monitor Series Dual 4 ohm Marine Certified Subwoofer

In Stock
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List price $279.95

$169.99

with warranty

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Arrives by Wednesday, July 30 to zip 98109

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The Mobile Monitor Series by Polk Audio is the result of 3 years of research and development. The series uses high quality materials and the newest loudspeaker technology to bring the listener an unforgettable experience. The best part about the MM Series is the affordable price.
  • 12" Dual 4 ohm Mobile Monitor Series Subwoofer
  • Power Handling:
    • Peak: 850 watts
    • RMS: 425 watts
  • Impedance: Dual 4 Ohm
  • Polymer woofer cone
  • Butyl rubber surround
  • Carbon Composite Basket is very lightweight and will not flex during use
  • Marine Certified
  • Nickel plated heavy duty terminals can be used with speaker wire up to 8 gauge or two twisted pairs of 12 gauge
  • Klippel Distortion Analyzer results in the best possible performance at any listening level
  • 2" High temperature copper voice coil
  • Frequency response: 27-200 Hz
  • Sensitivity: 88 dB
  • 1-year SonicElectronix.com warranty

Product History:

Polk Audio MM1240DVC thumbnail
(newest, current model)
Polk Audio MM2124DVC thumbnail
(previous model, replaced by Polk Audio MM1240DVC)

Subwoofer Specifications

Subwoofer Series
Each subwoofer manufactured is part of a series. This is the name of the subwoofer's series.
Mobile Monitor (Polk Audio)
Subwoofer Size
Refers to the diameter of the subwoofer, measured in inches.
12"
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.
850 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.
425 watts
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.
Dual
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
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).
27 - 200 Hz
Sensitivity
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".
88 dB
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.
25 mm
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.
Black
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.
Polymer/Mica Composite
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
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.
No
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.
No

Recommended Enclosure Specifications

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.

Sealed
Minimum Sealed Box Volume
This value indicates the minimum sealed box volume that the manufacturer recommends for the subwoofer. The volume is typically displayed in cubic feet.
.88 cubic feet
Maximum Sealed Box Volume
This value indicates the maximum sealed box volume that the manufacturer recommends for the subwoofer. The volume is typically displayed in cubic feet.
.88 cubic feet
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.
4-5/8"
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.
11"
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.

No

Warranty and Return Policy

Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Sonic Electronix

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
67%
4 Star
17%
3 Star
8%
2 Star
8%
1 Star
0%

Average Attribution Rating

Durability
4.3
Value
4.6
Features
4.7
Design
4.7
Usability
4.8

Tom

Apex, NC

Overall
Durability
Value
Features
Design
Usability

Polk mobile moniter 12" woofer Review

October 20, 2009

This has been the most amazing sub i have herd in a long time. For a 12" woofer it has the response of a 10", very crisp, very clear, has not distorted them, but i only have a 800w. But I have had no problems, and will definitely buy more

2 of 2 found this helpful

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Anthony

Los Angele, Ca

Overall
Durability
Value
Features
Design
Usability

High end subwoofer, low end price.

February 28, 2014

I have this sub in my regular cab truck, this thing pounds hard and the sound quality is amazing. Only thing is they are very power hungry, I first ran mine with a 300 w rms amp and the sub didn't sound clean or loud. Now I'm giving it 500w rms and it sounds amazing, loud and clear. I have owned a JL Audio w3 before and I actually like this one better and the price is even better.

0 of 0 found this helpful

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wiremyamp

Dorchester

Overall
Durability
Value
Features
Design
Usability

Hard hitting Bass in a low cubic space.

September 17, 2013

This sub rumbles my F150 in a small .88 cu of space. the only thing I have to say negative about the sub is at 70hz. it does not produce 70hz very well for some reason. besides that, it pounds.

0 of 0 found this helpful

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Drew

Peoria, AZ

Overall
Durability
Value
Features
Design
Usability

Great Sub

March 27, 2013

Great sub. Have it mounted under my rear seat of my 2010 f150 super cab. Wired down to 2 ohm with 500 rms Alpine amp powering it. This sub sounds amazing. Definitely worth every penny. After it breaks in, it just opens up and sounds great! This is an awesome shallow mount sub. You won't go wrong buying one of these. Only problem with mine, the sub is in a down firing box. It hits so hard the sub bottoms out on my carpet. I had to shove shims under the box to lift it a good inch or so. Now it's giving me the deep booming bass I enjoy. Sounds good with rock, good with rap, and sounds best pounding out house/techno. Hope this helps

0 of 0 found this helpful

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bear

fresno ca

Overall
Durability
Value
Features
Design
Usability

good stuff

March 19, 2013

Great speakers sound crisp and clean. Well worth the money

0 of 0 found this helpful

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Brandon

Hays, KS

Overall
Durability
Value
Features
Design
Usability

Nice budget friendly SQ sub

March 16, 2013

Picked up one of these and have it in a .8 CUFT enclosure with a little Polyfil to make up the difference. It's powered off an Infinity 611a at 2 ohms with the gain set for 450RMS using a 0dB test tone and DMM. Sub plays nice and clean, with a very punchy response. Sounds nice with rock music, but even with rap and hip hop it seems to hold it's own. Definitely not an SPL sub, so don't even think of getting it if you are looking to shake the car next to you. If you want a clean accurate sub that takes up very little space, for a 12" sub, and merely need enough output to fill YOUR car, this may be the ticket. It's not the cleanest sub I've heard and far from the loudest, but for the price, it's decent well rounded sub aimed at SQ over SPL. I've only been using it for 5 months, so I can't really confirm or dispute the poor longevity claims. Overall - 3 Value - 4 Good sub for the money, better SQ and louder subs can be had, but not usually for this price. Look/Design - 4 (I find it's looks kind of classy) Durability - 3 (only due to not really having it too long) Features - 5 (Sub has a decent xMax, low mounting depth, rubber surround, Marine Certification) Ease of use - It doesn't take a genius to wire up a speaker/sub properly.

0 of 0 found this helpful

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Chris

Collierville, TN

Overall
Durability
Value
Features
Design
Usability

AWESOME!

March 15, 2013

I have owned Polk subs in the past and this one did not let me down. Sounds GREAT!

0 of 0 found this helpful

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dferg1

Rock Hill, SC

Overall
Durability
Value
Features
Design
Usability

Best Value Ever!

June 13, 2012

This sub is highly efficient & hits really hard. It is definately the best sub I have ever owned hands down. No cons & I recommend it to anyone who needs a small box type sub in order to save space.

0 of 0 found this helpful

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AB

MI

Overall
Durability
Value
Features
Design
Usability

MM1240DVC

May 25, 2012

great subs. have them on a polk 1200.1 amp and they do pretty well. pretty clear for only being in a vented box

0 of 0 found this helpful

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Chris

CA

Overall
Durability
Value
Features
Design
Usability

Awesome sub...

March 25, 2011

I recently bought a single cab Toyota p/u that has two of these installed behind the seat. The seat still slides all the way back, so no loss of leg room. They sound great even with them being way under powered. Polk used a different material for the magnets enabling them to significantly reduce the size of the magnets, which is great for fitting a sub in tight space without going with a shallow mount sub. Overall I'm very impressed.

0 of 0 found this helpful

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Apollloshep

Charlotte, NC

Overall
Durability
Value
Features
Design
Usability

Not what I expected.......

December 23, 2010

I bought 2 of these and around 1.5 months one died then the other 2 weeks later. I may have gotton a bad batch since I have had Polks before. When they worked they sounded great. I decided to return these for another brand. For an extra 10 bucks you can get a set of 12"s that weigh 8 to 10 pounds more per sub and better voice coils and magnets. So far I have been happy with the new subs.

0 of 0 found this helpful

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Shannon

Columbus, MS

Overall
Durability
Value
Features
Design
Usability

Don't rely on Polk's home audio reputation

October 12, 2010

I own several thousand dollars worth of Polk audio home equipment and it is top notch. I assumed that their car audio would follow suit. This speaker sounds great, but did not last very long. I have owned JL audio subs for years without any failures, but this sub failed after 6 months. Buy Polk audio for your home, but stick to JL audio for your cars.

0 of 0 found this helpful

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Accessory Tools and Products

Accessories added

Single 12" Subwoofer Angled Truck or Hatchback Box Enclosure

CARB Compliant, 5/8" MDF Shallow Sub Enclosure Lined with Polyfil.

Your Price $34.99

Single 12" Sealed MDF Subwoofer Enclosure

12-inch Sealed Car Sub Box Made with 3/4" MDF and lined w/ Polyfil.

Your Price $34.99

Single 12" Ported Enclosure Custom Black Baffle

Gold Binding post terminals and a high quality 5/8" MDF construction.

Your Price $59.99

NVX 25 ft. of True Spec 12 Gauge Speaker Wire

100% OFC wire with EnvyFlex metallic jacket insulates and protects against damage from extreme conditions.

Your Price $39.99

25 ft. of Streetwires 12 Gauge Speaker Cable

You'll need speaker wire to hook up that new subwoofer!

Your Price $44.95

Belva 23 ft. of 12 Gauge Speaker Wire

Ultra-flexible PVC blended jacket for easy installation.

Your Price $14.99

20 Square Feet of Sound Dampening Material

NVX Sound dampening is thicker than competitors, eliminates rattles and gives you bigger bass!

Your Price $59.99

Dynamat Sound Dampening Trunk Kit

Did you know sound dampening will reduce those annoying rattles and even increase your SPL?

Your Price $109.95

Stinger Sound Dampening Trunk Kit

Stinger's Roadkill sound dampening series is sure to kill unwanted road noise and rattles! Enough sound dampening for your whole trunk!

Your Price $69.99

12 oz. Can of Adhesive Spray

Spray adhesive used for adhering carpet to subwoofer boxes without bubbles.

Your Price $6.99

Spring Post Terminal Cup

Makes adding a spring post terminal to an enclosure simple! Banana clip ready!

Your Price $3.99

40" x 15 Ft Piece of Premium Un-Backed Automotive Trim Carpet

Durable design for long life-span, available in many colors and shades.

Your Price $39.99

Gold Plated Dual Terminal Banana Plug Connector

Enables an expandable, secure connection accepting up to 8 gauge wire.

Your Price $3.99

Car Stereo and Speaker Installation Tool Kit

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

Your Price $12.99

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

Cordless Multi-Functional Heat Tool Soldering Iron Kit

Continuous working lock allows you to work without holding down trigger.

Your Price $79.99

4 Ft of 1/4" Thick Black Heat Shrink Tubing

Provides abrasion resistance and added protection for your cables.

Your Price $3.99

2" Universal, Professional Heavy Duty Roller for Sound Damping/Dampening

Universal rubber roller to make it easy to install sound dampening.

Your Price $7.99

1mm All Purpose Solder

Solder is all purpose for use on most projects where solder is needed.

Your Price $8.99

12" Protective Waffle Subwoofer Grille

Keep your subwoofer looking amazing while keeping it safe.

Your Price $4.99

Scosche SPL Meter

Monitor the noise level of your new car audio system with this SPL meter measuring from 60-135 dB.

Your Price $21.99

AutoSound 2000 CD-101

Low frequency test CD

Your Price $11.99

Impedance Meter / Signal Generator

Easy to locate tuning frequencies of passive radiators and ported enclosures

Your Price $299.99

1 Polk Audio MM1240DVC Subwoofer

Mono Amp

2 Channel Amp - Bridged

2 Polk Audio MM1240DVC Subwoofers

Mono Amp

Mono Amp - Option 1

2 Channel Amp

2 Channel Amp - Bridged

4 Channel Amp - Bridged

3 Polk Audio MM1240DVC Subwoofers

Mono Amp

4 Channel Amp

4 Polk Audio MM1240DVC Subwoofers

Mono Amp

2 Channel Amp

2 Channel Amp - Bridged

4 Channel Amp

Items we think you might want

MM1240 thumbnail

Polk Audio MM1240

• 800W Peak
• 425W RMS
• Polymer Woofer Cone
• Butyl Rubber Surround
• Carbon Composite Basket
• Marine Certified
• Klippel Distortion Analyzer

Your Price $169.99

Product Summary

Manufacturer

Model Number

MM1240DVC

UPC

747192114602

Weight

16.00lbs

Internal SKU

mm1240dvc

Internal Product ID

14747

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: Polk Audio MM1240DVC