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Memphis 15-M3124D

12" Dual 4 ohm M3 Series Subwoofer

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Memphis 15-M3124D

12" Dual 4 ohm M3 Series Subwoofer

$169.99

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  • 12" Dual 4 Ohm M3 Series Subwoofer
  • Power Handling:
    • Peak: 800 watts
    • RMS: 400 watts
  • Impedance: Dual 4 ohm
  • Kevlar reinforced paper cone
  • High-density foam surround
  • Custom-cast vented "M" Basket
  • Bolt-through modular motor for easy repair
  • Orange finish
  • Dual 4 ohm voice coils
  • 2.5" Black anodized aluminum 4-layer voice coil former
  • 85oz. Magnet
  • Sensitivity: 90 dB

Subwoofer Specifications

Subwoofer Series
Each subwoofer manufactured is part of a series. This is the name of the subwoofer's series.
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.
800 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.
400 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
Voice Coil Diameter
Diameter of voice coil, usually measured in inches.
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".
90 dB
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.
Kevlar Reinforced Pulp (Paper)
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.
Foam
Magnet Structure
Defines the overall structure of the subwoofers magnet.
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

Optimum Sealed Box Volume
This value indicates the ideal sealed box volume that the manufacturer recommends for the subwoofer. The volume is typically displayed in cubic feet.
Optimum Ported Box Volume
This value indicates the ideal ported box volume that the manufacturer recommends for the subwoofer. The volume is typically displayed in 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.
6.1"
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

Electromechanical Parameters

Free-Air Resonance (Fs)
The free-air resonance frequency of the subwoofer, measured in Hz. At this frequency the weight of the moving parts is perfectly balanced with the subwoofers suspension system.
Equivalent Compliance (Vas)
This is the amount of air that has the same stiffness as the subwoofers suspension. The greater the rating, the lower the stiffness and larger recommended enclosure. It is measured in Liters.
Total Speaker Q Value (Qts)
This is the subwoofers relative damping (Q) at the resonance frequency (Fs), including all dimensionless losses. Essentially, a high Qts value (closer to 1.0) means the subwoofer is great for sealed enclosures and a low Qts value (closer to 0) means the woofer is great in vented enclosures. A Qts of around 0.45 means the woofer will work decently in either enclosure type.
Electrical Q Value (Qes)
The subwoofers relative damping (Q) at the resonance frequency (Fs), including electrical losses. Also called the mechanical damping of the subwoofer. The unitless measurement usually varies from 0.5 – 10.
Electrical Resistance of Voice Coil (Re)
Amount of DC resistance of the subwoofer when measured with an ohm meter. Typically, this will read less than the impedance rating of the subwoofer.
Mechanical Q Value (Qms)
This is the subwoofers relative damping (Q) at the resonance frequency (Fs), including mechanical losses. Also called the mechanical damping of the subwoofer. This unitless measurement usually varies from 0.5 – 10.
Efficiency Bandwidth Product (EBP)
This number represents the trade off between having an efficient woofer and one with a wide bandwidth. To calculate this number, take the Fs and divide it by the Qes. If the number is below 50, the woofer is designed for a sealed enclosure only. If it's between 50-100 it can be used in either. Lastly, if it's greater than 100 it's designed for vented enclosures.

Specials with this Item

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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
22%
3 Star
11%
2 Star
0%
1 Star
0%

Average Attribution Rating

Durability
4.7
Value
4.3
Features
4.3
Design
4.7
Usability
4.6
Hix

Davenport, IA

Overall
Durability
Value
Features
Design
Usability
spend an extra $60 and get the new ones

December 29, 2008

I just bought the new 08 model of the M3 and let me fill you on on a secret, this things pound! i have never heard a system of this quality in my life. I have friends with memphis PRs, xtant 12s, alpine type Rs, sony xplods, and kicker CVX and CVRs and the M3s make them sound like nothing. The sound quality is great and the bass is incredible. My head unit goes to 50 volume and 20 is great daily driver, but once you hit 25 they hit harder than heck. I haven't been able to go past 25 yet because i have not yet purchased a capacitor, which i will definitely order from sonic. Sonic, delivers great products at great prices. I have purchased Dynamat kits, head units, and an amp from them and so far so great so if ur gonna buy something for your car, get it from SoNiC

12 of 14 found this helpful

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Gil

hanford, ca

Overall
Durability
Value
Features
Design
Usability
RESPECT!!!!!

February 21, 2009

The m312d4 i bought 2 of them with an 1100 d mclass amp they hit so hard with amp at half capacity that my head unit skips bad honestly in the last competition i was in i took 1st place.

9 of 11 found this helpful

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rado

coon rapids, anoka

Overall
Durability
Value
Features
Design
Usability
Great subs

February 27, 2010

this sub sounds great, i have two in my truck in a sealed box. hits high bass, and the way low bass. even the lows in a sealed box. worth it. i have owned for eight months now and have not had a problem.

8 of 10 found this helpful

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vj

fort myers, fl

Overall
Durability
Value
Features
Design
Usability
amazing

April 3, 2009

these subs sound great....I have them on a 800 watt sony bridged at 2ohms and they sound good...nice, clean bass. With nice low hz...highly recommended.

8 of 10 found this helpful

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Trudy

Coleman, OK

Overall
Durability
Value
Features
Design
Usability
Memphis M3

December 18, 2008

Great sound quality coming from this subwoofer. Hits good bass notes from low to high. I ran two of these in a ported box hooked up to a Hifonics 750 watt wired a 1 ohm. My biggest complaint is that these subs dont get loud enough. Compared to my old Kicker CVXs, these subs arent near as loud.

8 of 10 found this helpful

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Monique

Hillsville, VA

Overall
Durability
Value
Features
Design
Usability
oh my god!!!!!!

July 10, 2008

Dude this sub hits i just got it and it hits the lows and highs with now problem. its in a ported box and that helps alot. if you are looking for a good sub then get this sub.

8 of 10 found this helpful

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Trapp

North myrtle beach sc

Overall
Durability
Value
Features
Design
Usability
Best bang/ boom you can get

March 9, 2014

I have 2 of theses at 1ohm I'm a ported box and they are crazy I shut down my cousin 2 pioneer tsw3001d4 on 2500 watt amp and I'm only using a memphis pr1.1000 amp on my 2 memphis m3s great subwoofers I abuse them every day for the last yr and they take it

7 of 9 found this helpful

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fifteens

California

Overall
Durability
Value
Features
Design
Usability
unimpressed

January 2, 2010

I was unimpressed with the performance of this sub. I had it in a sealed enclosure running about 450w rms to it (Fosgate amp) and lets just say i was underwhelmed. Off the same amp I ran a Pioneer Premier (also dvc, also 400w rms, also in a sealed box) and the premier not only sounded much cleaner, but hit quite a bit harder...It seemed as if the Pioneer even outperformed it on lower note extension, which i wasn't expecting...I have liked many Memphis products so far, the PR series are as good as it gets for entry level, but i just cant recommend the m3 series, especially in this price range..many subs in this range vastly out perform this sub, and even a few in a cheaper range (kicker cvr, aforementioned Premier etc)..

6 of 8 found this helpful

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jevelle420

Ringtown, Pennsylvania

Overall
Durability
Value
Features
Design
Usability
m3

June 14, 2012

Put the subs in a ported box. These aren't cheap subs. They need room to breath I hit a 147.5 w/ 2 of them your Pioneers can't even hit a 135 flat right box, and amp you won't think twice that these are one of the best woofers you ever bought mine are 8 years old on a mojo 2500.1 d amp way over powered they handle it all day everyday. They just won't quit. Another one of the best woofers I've owned.

4 of 5 found this helpful

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Accessory Tools and Products

Accessories added

25 ft. of Streetwires 12 Gauge Speaker Cable

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

Your Price $37.85

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 $53.99

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 $64.87

Dynamat Sound Dampening Trunk Kit

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

Your Price $87.63

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

Car Stereo and Speaker Installation Tool Kit

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

Your Price $18.99

Cordless Multi-Functional Heat Tool Soldering Iron Kit

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

Your Price $74.99

12 oz. Can of Adhesive Spray

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

Your Price $8.97

Gold Plated Dual Terminal Banana Plug Connector

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

Your Price $1.99

Universal 12" Subwoofer Grille

Keep your subwoofer safe from accidental damages with this amazing grill.

Your Price $19.95

Universal 12" Subwoofer Grille

Keep your subwoofer safe from accidental damages with this amazing grill.

Your Price $19.95

12" Protective Waffle Subwoofer Grille

Keep your subwoofer looking amazing while keeping it safe.

Your Price $6.99

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

1 Memphis 15-M3124D Subwoofer

Mono Amp

2 Channel Amp - Bridged

2 Memphis 15-M3124D Subwoofers

Mono Amp

Mono Amp - Option 1

2 Channel Amp

2 Channel Amp - Bridged

4 Channel Amp - Bridged

3 Memphis 15-M3124D Subwoofers

Mono Amp

4 Channel Amp

4 Memphis 15-M3124D Subwoofers

Mono Amp

2 Channel Amp

2 Channel Amp - Bridged

4 Channel Amp

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Product Summary

Manufacturer

Model Number

15-M3124D

Weight

30.00lbs

Internal SKU

15m3124d

Internal Product ID

10189

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: Memphis 15-M3124D