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RE Audio SEX15D4

600W 15" SE-X Series Dual 4 ohm Subwoofer

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List price $549.99

$199.99

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RE Audio SEX Subwoofers

RE Audio’s SEX Line of subwoofers redefines high performance and value. These subwoofers are placed in the middle of RE Audio’s full line-up, and can handle high power output around 600 watts RMS! These SEX Subwoofers are the perfect addition to any trunk!

These impressive subwoofers are built into a cast aluminum basket, and their triple stacked magnet drivers work off of a 3” 4-layer aluminum voice coil. This allows for quick bass response, and clearly outputs for deep bass in the lower frequency range. With an FEA optimized motor structure, the SEX subwoofer lineup maintains tight bass response and allows the subwoofer full control over all types of music.

Each one of these RE Audio SEX Subwoofer can handle 600 watts RMS of continuous power, no matter the size! These competitively priced subwoofers are an excellent complement to any audio system, and will provide you with that clean, hard hitting bass you’re looking for.

Subwoofer Features:
  • 15" Dual 4 ohm SEX Series Car Subwoofer
  • Power Handling:
    • RMS: 600 watts
  • Impedance: Dual 4 ohm
  • Dual composite 2-piece cone
  • Rubatek foam surround
  • FEA Optimized motor structure
  • Progressive spiders
  • Wrap around rubber gasket
  • Tork-Tite terminals
  • 3" 4-Layer voice coil
  • Triple stacked magnets
  • Also available in a Dual 2 ohm: RE Audio SEX15D2
  • Authorized Internet Dealer
  • 1-year Manufacturer's warranty
SEX 15" T/S Parameters:
  • Electrical Q Value (Qes): 0.55
  • Mechanical Q Value (Qms): 4.3
  • Total Speaker Q Value (Qts): 0.49
  • Free Air Resonance (Fs): 22 Hz
  • Equivalent Compliance (Vas): 209 liters
  • One-Way, Linear Excursion (Xmax): 18 mm
  • Efficiency (SPL 1W/1m): 88 dB SPL
  • Effective Piston Area (Sd): 810 cm2
  • DC Resistance (Re): 2.8 ohm
  • Nominal Impedance (Znom): Dual 4 ohm
  • Thermal Power Handling (Pe): 600 W
  • Force Factor (Bl): 17.7

For more information on the Thiele and Small Parameters, visit our T/S Parameters Article

Product History:

RE Audio SEXv2-15D4 thumbnail
(newest, current model)
RE Audio SEX15D4 thumbnail
(previous model, replaced by RE Audio SEXv2-15D4)

Subwoofer Specifications

Subwoofer Series
Each subwoofer manufactured is part of a series. This is the name of the subwoofer's series.
SEX (RE Audio)
Subwoofer Size
Refers to the diameter of the subwoofer, measured in inches.
15"
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.
600 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.
3"
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.
18 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.
Dual Composite 2-Piece Cone
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.
Rubatek Foam
Magnet Structure
Defines the overall structure of the subwoofers magnet.
Triple Stacked
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.

Ported / Vented
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.
1.5 cubic feet
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.
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.
2.0 cubic feet
Minimum Ported Box Volume
This value indicates the minimum ported box volume that the manufacturer recommends for the subwoofer. The volume is typically displayed in cubic feet.
3.0 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.
Maximum Ported Box Volume
This value indicates the maximum ported box volume that the manufacturer recommends for the subwoofer. The volume is typically displayed in cubic feet.
4.0 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.
8-1/2"
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.
14"
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.
22 Hz
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.
209 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.
0.49
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.
0.55
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.
2.8 ohms
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.
4.3
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
Manufacturer

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
83%
4 Star
14%
3 Star
3%
2 Star
0%
1 Star
0%

Average Attribution Rating

Durability
4.6
Value
5.0
Features
4.5
Design
4.8
Usability
4.9

Sam

Australia

Overall
Durability
Value
Features
Design
Usability

Redefines 'bang for your buck'

March 2, 2012

On a budget considering the price of shipping and installing these are near best you can get for the price. Bought a pair of them powered with a Hifonics Brutus brz1200 wired down to 1ohm and they slam so hard. People hear it before I even drive into the street. Everytime the bass drops it makes me smile and think how its worth every single cent.

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James

New york

Overall
Durability
Value
Features
Design
Usability

Built very well.

September 19, 2013

These woofers can handle a lot of power if you know what your doing. I built a custom 12 cubic foot box ported at 32 hz drivers and port are on the same plan. These are very good sounding drivers they will produce some serious spl if you do your research and testing.

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BigBull

Indianapolis, IN

Overall
Durability
Value
Features
Design
Usability

Great Sub...

March 16, 2014

I would recommend anyone to buy this subwoofer...It perform wonderful and it hits hard when you put the rite power to them....I have 2..and plan on buying 2 more...

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Robert

Alexandria, KY

Overall
Durability
Value
Features
Design
Usability

Awesome sub!!!

March 4, 2014

Had it for two weeks and love it. Ran my Rockford Fosgate P600.1bd at 2 ohms 600 watts from the get go and no issues. People think that you need to "break them in". I didn't and no probs. Slams like crazy in a 4 cubic ft. box at 34hz. Had to build the box in my trunk though, but you'll have that with a Mustang GT. I will be getting the Hifonics BRX1100.1 soon so we'll see if this thing can handle 800 watts at 2 ohms!!!

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Brandon

rancho santa margarita, CA

Overall
Durability
Value
Features
Design
Usability

Un Real Output in Proper AirSpace

January 20, 2014

If you want to do "hair tricks" just buy two of these sub's, Build a 12 cubic foot rectangle box with one port about 8 inches wide and 20 inches tall 14. 5 deep Use the RE AUDIO BOX CALCULATOR .Then add your speakers and you will end up with just over 8 cubic feet of airspace tuned at 32hz witch I promise Is what you want!!! Add at least 1200 watts rms and make sure your electrical system is up to par..I;E correct wire size/big 3 upgrade and second battery,alternator upgrade..Pick any two of those at least then sit back and enjoy the sound of your truck or car trying to peel sheet metal of and your windshield making sounds that you thought glass could not make and be happy..You just purchased the best subwoofer for the money that can be found on planet Earth...

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Eric

Spring Hill, TN

Overall
Durability
Value
Features
Design
Usability

WOAH. BASS.

January 3, 2014

I just installed two of these bad boys in the trunk of my Altima. These things scream. Loud, clear, crisp. Those three adjectives perfectly describe these subwoofers! But what they don't tell you is what else comes in the box. Not one, but TWO allan keys. TWO. These TWO allan keys make installs a breeze. With their chrome finish, you will not find better allan keys at your local Home Depot.

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doug

paris tn

Overall
Durability
Value
Features
Design
Usability

good subs

November 3, 2013

Good subs that can take a lot of pounding watts from the amplifiers

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Rafael

Yuma, AZ

Overall
Durability
Value
Features
Design
Usability

Great Subs on awesome price

October 24, 2013

Just got two of these and you just cannot beat the price. They have a very large triple stacked magnet and you just cant tell how big they are unless you see them in person. Like always, got to my doorstep in two days! With free shipping, you cant beat that. Will be writing an update once they are placed in a proper enclosure. Im sure I will not be disappointed.

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Mat

Reynoldsburg, OH

Overall
Durability
Value
Features
Design
Usability

sex15d4 review

October 14, 2013

This sub is awesome for the price. I did a 150.2db with four of these on 2600rms and won Ohio state championship.

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travis

ohio

Overall
Durability
Value
Features
Design
Usability

RE audio sex15D4

September 18, 2013

Absolutely love the speakers, arrived just as expected, on time, and packaged very well! Great job Sonic! Customer service is as good as it gets!

0 of 0 found this helpful

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Alexander Supertramp

Canada

Overall
Durability
Value
Features
Design
Usability

Great

May 31, 2013

First sub I've ever owned, awesome and hammers hard. Think it's a great price for the quality of it. My friend got a 15 P3 and this thing out does it by a great deal. I've got it running at 2ohm 34hz and it's great.

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Nigel

Canada

Overall
Durability
Value
Features
Design
Usability

Loving the Output

May 31, 2013

Have this running off of 600 watts in a 2 cubic foot sealed enclosure right now, and it definitely hammers. Nice sturdy built driver, tons of linear excursion, good output, perhaps down the road when I have more money I will be building a nice ported enclosure for it but for now, it more that meets and exceeds my expectations.

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eddie

El Paso, TX

Overall
Durability
Value
Features
Design
Usability

yes

March 29, 2013

I have 4 of these in my 2001 suburban hooked up to 2 power acoustic bamf 4000watts amps I been running this set up for four years now love the bass ive won alot of bass comps featured in car auto mag I say re makes a great sub the highest ive hit so far was 154

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Andy C

Tulsa, OK

Overall
Durability
Value
Features
Design
Usability

Gets low and still sounds great!

February 18, 2013

Sometimes people have different opinions on 15" subs, whether it be they're too sloppy or don't hit the higher notes quite as well. I don't really have that problem with this sub as long as its enclosure and power supply are in check. I have mine in a 3.0 cubic foot box port tuned to 34hz, and 650w @ 2ohms. It's fairly clean and is loud enough to wake the neighbors. Having owned the previous SE15 with the narrow spoked basket, that's about the only change I can tell. RE products seem to still be dependable! Give it a go, or go for its bigger brother, the SXX. You won't be disappointed.

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Adam

Japan

Overall
Durability
Value
Features
Design
Usability

Great value for money

December 26, 2012

On a tight budget, so I did my research and went with one 15D4 on a Hifonics GLX 1001.1 at 750ish watts RMS @ 2ohms in my hatchback. Very pleased with the accuracy and tone of this sub in a 52 litre sealed rear-facing setup. "Bass, I love you" will flap a shirt in my drivers window, musical enough to please me and my wife while listening to classical music, great accuracy. Great for Jazz, classical, house, dubstep, electro, you name it. This sub represents excellent value for money and I'd be buying another one or three if space wasn't an issue (^ ^)

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harris

montgomery, al

Overall
Durability
Value
Features
Design
Usability

very great value

November 26, 2012

These are the best subwoofers I have purchased so far... they hit lows very good...I'm talking about ground shaking lows...I currently have three of them in my truck now thinking about getting a fourth one

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alex

apple valley, Minnesota

Overall
Durability
Value
Features
Design
Usability

love it

June 19, 2012

Have it at 500rms. Could take 650 700 daily. With your gain set right.

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brendan

Minneapolis, MN

Overall
Durability
Value
Features
Design
Usability

great value

March 14, 2012

Great subs for the price. Make sure you have at least 8 cubes b4 woofer and port displacement. Not the loudest subs but great sq even for 15s.

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the car audio nerd

bass space,

Overall
Durability
Value
Features
Design
Usability

RE is still decent

March 9, 2012

It was either have a choice between this here re sex, audioque sd or the americanbass tnt line. After trying hard to see if anybody had any of them I located a pair of tnt 15s, they forsure sound good play lows good and everything, i will say i only heard 1 of these sexs but just the 1 sound really really nice, played lows way better than what it thought it would for a 600rms sub, this thing forsure handle more than 600rms, it might burn up at 1k tho, for about 360 a pair with 3 year warrenty its a good deal, yes they make some money but the only reason im buying them is becuase i know Sonic is loyal to their warranty's. All the stuff on these are decent, nothing like a high leval sub but i know sombody who had an se model for 4 years. The surround is good, the spiders seem good, the coils are quilty, the motor has a nice charge to it and the metal is good quality, the only thing im worried about are the leads, if u wanna run around 1200 rms id find something else, i mean it might take it for a little. If your thinking about a solid 15 and want to have clean low bass, i would say this is a good choice. 2 of these in a box with clean power will sound pretty darn good. And yes these are louder than sundown sa series subs too, i will be reviewing these again in couple days ill give you as much info as i can.

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kyle

Bonner Springs, KS

Overall
Durability
Value
Features
Design
Usability

great cheap sub

January 26, 2012

I had a 15" Alpine type-r before this. SQ wise this sub wins hands down. In spl the alpine type-r has it by a little bit. Overall i like this better than the type-r.

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Accessory Tools and Products

Accessories added

15” Dual Sealed Single Cab Truck Subwoofer Box

Durable 11/16" Medium Density Fiberboard (MDF) construction.

Your Price $89.95

Single 15" Sealed MDF Subwoofer Enclosure

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

Your Price $44.99

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

20 oz. Bag of Poly-Fil

Polyester fiber fiberfill adds better bass to your system.

Your Price $5.99

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

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

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

15" Protective Waffle Metal Subwoofer Grille

Keep your subwoofer looking amazing while keeping it safe with its durable metal construction!

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

Impedance Meter / Signal Generator

Easy to locate tuning frequencies of passive radiators and ported enclosures

Your Price $299.99

1 RE Audio SEX15D4 Subwoofer

Mono Amp

2 Channel Amp - Bridged

2 RE Audio SEX15D4 Subwoofers

Mono Amp

Mono Amp - Option 1

2 Channel Amp

2 Channel Amp - Bridged

4 Channel Amp - Bridged

3 RE Audio SEX15D4 Subwoofers

Mono Amp

4 Channel Amp

4 RE Audio SEX15D4 Subwoofers

Mono Amp

2 Channel Amp

2 Channel Amp - Bridged

4 Channel Amp

Browse 1 question and 4 answers
Hide answersShow all answers | Sort by
What kind of amp would I need for one of these?
A shopper on Aug 20, 2014
Best Answer: First of all, an AMP with plenty of "headroom"

So, I went with the Park Audio DX700B.

Product Description
--DX700MB-8, Class D digital amplifiers light weight switching power supplies are over 70% efficient at full output.
--The DX Series, Intelligent Digital Amplifiers, designed according to Class D technology to deliver high efficiency and least heat and drive loudspeakers to unprecedented levels of accuracy and performance.
--The DX Amplifiers combine comprehensive driver protection, parametric equalization and light.
--The high sound quality comparable with the best analogue amplifiers.
--The amplifier is designed as a mono-block unit.
--All its components are installed on a single bearing panel placed inside the case which protects the unit and ensures its deep placement into the body of a speaker system.

SPECIFICATIONS
Output Power: 700W (8Ohm, 100Hz, 120V)
Peak Output Power: 840W (8Ohm, 10ms, 120V)
Frequency Response*: 45 Hz . 80…350 Hz (700W, 8Ohm)
Total Harmonic Distortion: 0.05% (45Hz – 350Hz, 8Ohm)
Slew Rate: 20 V/µs (LF filter disabled)
Damping Factor: over 200 (100Hz, 8Ohm)
Signal-to-Noise Ratio: 98dB (unweighted)
Sensitivity: 775mV
High-pass Filter Cutoff Frequency: 45Hz (basic model)
High-pass Filter Slope: 24 dB/oct
Low-pass Crossover Filter Cutoff Frequency: 80-350 Hz
Crossover Low-pass Filter Slope: 12 dB/oct
Power Requirements: AC120V, 50/60Hz
Weight: 8Lb
Dimensions: 7.8? (width) 16.04? (height) 4.1? (depth)

And it's manufactured in the Ukraine. Compare the innards to those made in China,
and you'll see why it sells for $400. The bass quality=superb
Reply · Report · David T on Aug 20, 2014
· Add Answer · I Have This Question Too (0)

Product Summary

Manufacturer

Model Number

SEX15D4

UPC

611892991095

Weight

26.00lbs

Internal SKU

sex15d4

Internal Product ID

27309

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: RE Audio SEX15D4