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Polk Audio DB1240DVC

360W 12" db Series Dual 4 ohm Marine Certified Subwoofer

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List price $119.99

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$64.99

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Polk Audio DB1240DVC

The db models have been styled with “tuner” automotive enthusiasts in mind—from the wheel style grilles to the textured driver cones, db says “hot car.” But Polk's db series offers much more than great styling. The full force of Polk Audio’s award-winning engineering went into developing high performance to match the cosmetics. All of the components in the db Series benefit from Polk’s Dynamic Balance technology that stems from a joint research project between Johns Hopkins University's Center for Non Destructive Evaluation and Polk Audio.

The new db Series has been built tough to withstand the rigors of exposure to the sun, water and salt to earn Marine Certified status. db Series speakers are perfect for use in boats of all types.

Products Specifications

  • 12" Polk Audio db Series Marine Certified Subwoofer
  • Power Handling:
    • Peak: 720 watts
    • RMS: 360 watts
  • Impedance: Dual 4 ohm
  • Polypropylene cone
  • Santoprene surround
  • Fire-retardant flat NOMEX Spider
  • Double venting of the 4-layer Kapton Voice Coil Former, Cone/Coil Coupler and Pole Piece
  • 2" Kapton dual voice coil
  • Frequency response: 27-200 Hz
  • Sensitivity: 88 dB
  • db Series Subwoofer Grill Available
  • 1-year SonicElectronix.com warranty

Product History:

Polk Audio DB1240DVC thumbnail
(newest, current model)
Polk Audio db124DVC thumbnail
(previous model, replaced by Polk Audio DB1240DVC)

Subwoofer Specifications

Subwoofer Series
Each subwoofer manufactured is part of a series. This is the name of the subwoofer's series.
db (Polk)
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.
720 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.
360 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.
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.
9 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.
Polypropylene
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.
Santoprene Rubber
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"
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

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
68%
4 Star
27%
3 Star
5%
2 Star
0%
1 Star
0%

Average Attribution Rating

Durability
4.4
Value
4.5
Features
4.1
Design
4.5
Usability
4.6
Eddy P

Miami FL

Overall
Durability
Value
Features
Design
Usability
Amazing sub for the money

August 18, 2014

Unless your a total snob or trying to compete there is no reason why you should not buy this sub. The sound is great, I'm running a bridged channel from my Precision Power PPI P900.4 to 1 sub. In my rsx it sounds amazing. Its loud to the point you can feel it but wont rattle your car like a tin can. I'm sure If I had 2 it would be just that much more amazing. It sounds way better than some of the 100+ dollar subs out there. It looks a bit weak from its small magnet and depth but it packs a good punch. The sound quality is amazing as well.

Gave it a 4 for durability as it is still too early to tell

0 of 0 found this helpful

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basshound

Canada

Overall
Durability
Value
Features
Design
Usability
awesome price for a great product

September 17, 2013

This sub pounds. In the trunk of a car even though marine rated, it certainly does punch out some bass!

0 of 0 found this helpful

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Jeff

Joliet, IL

Overall
Durability
Value
Features
Design
Usability
Nice sub

December 25, 2012

Bought this sub to put in my bazooka tube since the bazooka sub just stopped working after about 2 days. This sub for the most part fit right into the bazooka tube, and since this sub is marine rated I actually bought ot for my boat. Boat is rockin now!

0 of 0 found this helpful

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djdonee

Muscle Shoals, AL

Overall
Durability
Value
Features
Design
Usability
Very good for budget subwoofers!

June 27, 2012

I just hooked these up yesterday to a 2500 watt Boss amp (I have it wired at 4 ohms which is only about 760 RMS) and boy, do these things sound pretty good! I put them in a sealed box divided, with .088 sg ft on each side (recommended air space). I doubt you'll win any competitions, but if you are looking for budget woofers that hit hard and sound good for the money, then these are the ones for you. All of my friends are very impressed, especially after I tell them what I paid for them, lol. My car is a hatchback, and you can hear these thumping from several blocks away. Great job Polk Audio on this model.

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Buzz

Baconville

Overall
Durability
Value
Features
Design
Usability
Fisherman blues

March 5, 2012

Sometimes when the fishing is slow the speakers need to blow. The Polk sub woofer gives you an edge when over eager boats getting too close. I am sure if you are listening you can hear me from the boat landing sending low frequency vibes down to my finned friends in the underworld.

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Donald

Seminole, TX

Overall
Durability
Value
Features
Design
Usability
Donnie

January 8, 2012

Great sounding subs. Good value, would recommended.

0 of 0 found this helpful

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Promo

Ionia, MI

Overall
Durability
Value
Features
Design
Usability
Bangin!

December 26, 2011

Let's cut to the point, buy this sub. I have two of them hooked up to a Hifonics 1000.1d amp at 1 ohm in a Fierce Audio dual 12" vented box, and they are very impressive. They don't boom, they knock. Very clean, but very loud. Highly recommend them!

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djcrusha

dublin, oh

Overall
Durability
Value
Features
Design
Usability
great sound

November 9, 2011

For 360w an under power spl amp at 340w still sounds loud sittin outside of a bank one day lisen to yung jezzy hyponties after 2 sec one of banker asked me to turn it down so I did. I have a JVC deck the volume was only at 30. But overall I would buy a few more for my next car db polkaudio sub.

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Matthew

Memphis, TN

Overall
Durability
Value
Features
Design
Usability
Amazing Product

August 30, 2011

I used to own a polk and that thing slammed hard. This is almost the exact same subwoofer but the rubber is santoprene and not butyl. They have the same frequencies and wattage. The db sounds amazing. I think it sounds better than the Dxi I used to own. A must buy.

0 of 0 found this helpful

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cdomatt

Keokuk, Ia.

Overall
Durability
Value
Features
Design
Usability
BEST SPEAKERS ON THE PLANET!!!!

June 5, 2011

Recently purchased the DB1240DVC sub. It honestly is the most impressive sub I've ever run across. Cleanest, clearest, loudest low end imaginable. Thank you Polk Audio.
Matthew Smith

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noneya

broken arrow, Oklahoma

Overall
Durability
Value
Features
Design
Usability
GREAT BUY

May 1, 2011

Best subs I've ever had.. have 2 running at 600 RMS in a ported box 1.6 cubic ft per chamber each.. and they take every minute of it! Hit highs good and hit lows good! Overall great subs I will buy again

0 of 0 found this helpful

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DrummaBoi

Loganville, Ga

Overall
Durability
Value
Features
Design
Usability
If your on a budget get em!!!

April 13, 2011

I had two of these in a ported box with a Hifonics Brutus 1200 watt amp and I was setting off car alarms all day! good buy..

0 of 0 found this helpful

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josh

shasta lake, CA

Overall
Durability
Value
Features
Design
Usability
Unbelievable

February 19, 2011

I was a bit leery going in to this sub as i have always ran Pioneer and I am blown away by the power and output this thing produces. The one fall back is the wire hook ups on the sub

0 of 0 found this helpful

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Byrdman

Rochester

Overall
Durability
Value
Features
Design
Usability
Polk db1240dvc

January 25, 2011

I had this hooked up to an 800 watt amp and it blew out within a couple months. It may be my fault for overpowering the subwoofer too much. Make sure your amp doesn't overpower this one because other than that the sound was excellent.

0 of 0 found this helpful

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S

Worland, WY

Overall
Durability
Value
Features
Design
Usability
Polk rocks

November 12, 2010

Polk speakers are great. Love the sound and quality.

0 of 0 found this helpful

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T

West Lafayette, IN

Overall
Durability
Value
Features
Design
Usability
Good

November 11, 2010

This has been a good sub for my boat. It kicks pretty hard and will rattle my whole wakeboard tower. It is pushed with a 1000W boss amp.

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A.J.

Ankeny, IA

Overall
Durability
Value
Features
Design
Usability
5 out or 5

October 12, 2010

I got a pair of these a few months ago and they have been incredible. The bass is tight and loud. I have them in a sealed .9 cu foot enclosure that I made myself hooked up to a Rockford Fosgate T500-1bd at 1 ohm. The gains are set at 30-40% and they rattle my car if I crank the volume pass 10 (max is 63) I love these as they have the precision of 10" and can bump like 12". I would definitely recommend them but be sure to add sound deadening and upgrade the door speakers so you get a full sound experience.

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david

Sahuarita , AZ

Overall
Durability
Value
Features
Design
Usability
BOOM!

September 9, 2010

I built a bandpass box for the 1st time. Polk has specs online which made it easy.

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Tater

Fairfax, VA

Overall
Durability
Value
Features
Design
Usability
surprising little sub!

July 18, 2010

I just put one of these in my girlfriends car. Excellent range and surprising kick! The sub sounded a lot better than my kicker L5 as far as sound quality goes. Would recommend to anyone looking for a budget friendly sub

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Kevin

Galesburg, MI

Overall
Durability
Value
Features
Design
Usability
Very Good

March 18, 2010

Had 2 of these in my car hooked up to a kenwood 1000w amp sounded very good and have very good range.

0 of 0 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 $44.95

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

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 $1.99

Car Stereo and Speaker Installation Tool Kit

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

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

Polk Audio DB12G

12" db Series Subwoofer Grille

Your Price $20.99

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

Impedance Meter / Signal Generator

Easy to locate tuning frequencies of passive radiators and ported enclosures

Your Price $299.99

1 Polk Audio DB1240DVC Subwoofer

Mono Amp

2 Channel Amp - Bridged

2 Polk Audio DB1240DVC Subwoofers

Mono Amp

Mono Amp - Option 1

2 Channel Amp

2 Channel Amp - Bridged

4 Channel Amp - Bridged

3 Polk Audio DB1240DVC Subwoofers

Mono Amp

4 Channel Amp

4 Polk Audio DB1240DVC Subwoofers

Mono Amp

2 Channel Amp

2 Channel Amp - Bridged

4 Channel Amp

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• 540W Peak
• 270W RMS
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• Polypropylene Cone
• Santoprene Surround
• Dual Voice Coil
• Fire-retardant Flat NOMEX Spider

Your Price $59.99

Browse 2 questions and 3 answers
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Why did you choose this?
Sonic Electronix Store
low price nice sub
john j on Aug 1, 2014
i'm making a custom box for the bed of my truck and i was just wondering how big of an enclosure i will need? i'm making two separate sub boxes with another box in between for some regular speakers i was thinking 4 or 5 depending on how much room i will have left over and to use as extra cargo space for tools and what ever else i cant store behind my seat. my truck bed is 58 inches wide but with the bed liner it is closer to 57.5 inches.
tommy gunn on Sep 20, 2014
Best Answer: These speakers need a lot of room I was going to use it in a prefab truck box for a 2008 dodge 1500 quad cab
but the steel frame was a little wide. So my assumption is you have the room but a regular size enclosure will be fine. Sorry not a custom box guru!
Reply · Report · john j on Sep 22, 2014
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Product Summary

Manufacturer

Model Number

DB1240DVC

UPC

747192113810

Weight

14.00lbs

Internal SKU

db1240dvc

Internal Product ID

14921

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 DB1240DVC