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RE Audio REX12D4

175W 12" REX Series Dual 4 ohm Subwoofer

Discontinued
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This item has been discontinued

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Anything But Entry Level

What RE Audio calls entry level is anything but entry level. Introducing the new REX series. It offers incredible output and distortion free sound you would come to expect from subs costing far more. REX car subwoofers are perfect for those just entering the car audio scene. Popular among the import and other cars where weight is important, these lightweight subwoofers are an excellent solution for performance vehicles that can’t have heavy subwoofers with large boxes. The mica filled poly cone is stiff and rigid, while the Santoprene rubber surround allows excellent response. Behind the cone is a high temperature 8-layer copper voice coil, a FEA optimized motor structure, and a conex spider that all assist in the linearity of the subwoofer when in use. With a RMS power handling of only 175 watts, these subwoofers do not require a large, powerful amplifier. However, like all of the RE Audio subwoofers, they are capable of accepting much more power then the recommended RMS. For an entry level subwoofer that is far beyond all the other entry-level subwoofers, trust the RE Audio RES series of car subwoofers to bring great bass in your car.

General Features:

  • 12" Dual 4 ohm REX Series Subwoofer
  • Power Handling:
    • RMS: 175 watts
  • Impedance: Dual 4 ohm
  • Mica filled poly cone woofer
  • Santoprene rubber surround
  • Pressed steel basket
  • FEA Optimized motor structure
  • Linear Conex spiders
  • Rubber gasket
  • High temperature 8-layer copper voice coil
  • Powerful, single stacked magnet
  • Sensitivity: 87.3 dB
  • Authorized Internet Dealer
  • 1-year Manufacturer's warranty

Subwoofer Specifications

Subwoofer Series
Each subwoofer manufactured is part of a series. This is the name of the subwoofer's series.
REX (RE Audio)
Subwoofer Size
Refers to the diameter of the subwoofer, measured in inches.
12"
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.
175 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
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".
87.3 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.
12 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.
Mica Injected Polypropylene (MIPP)
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.
Single 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.
0.4 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.
0.75 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.
1.25 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.
1.5 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.
5-1/2"
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.
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.
20 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.
182 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.
0.38
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.
0.42
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.
3.2 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.
4.27
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.
47.61

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
63%
4 Star
21%
3 Star
5%
2 Star
0%
1 Star
11%

Average Attribution Rating

Durability
4.3
Value
4.6
Features
4.1
Design
4.5
Usability
4.4
mike

port byron, NY

Overall
Durability
Value
Features
Design
Usability
decent

July 15, 2011

sub is great, doesn't need a ton of power but, will take way more than the ratings show. the only con is that the lows aren't 100% of what i was looking for, however the mids are nuts!! all in all, great product

2 of 2 found this helpful

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jdrake

aiken sc

Overall
Durability
Value
Features
Design
Usability
re rex12d4

October 25, 2013

This is a good subwoofer for those not looking for A lot of ground pounding bass. The sound quality is Very good. But for the price they do get down pretty good once broken in properly in the proper enclosure.

0 of 0 found this helpful

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Erik

Livermore, CA

Overall
Durability
Value
Features
Design
Usability
Great Entry Level Subwoofer

October 4, 2013

Started out with an 8" Kicker C88 which I connected to my stock Mark Levinson amp. I replaced it with the RE REX 12 and it was a huge upgrade. I mounted it in a Belva ported enclosure and it sounded great. I eventually powered it with a JL JX250/1 and it handled the extra wattage just fine, however because the magnet is so small, in addition to the cheap price for the sub, I recommend going with 2 of these. If you're worried about space, I'd recommend an Atrend Dual ported box with 2 REX's. The one thing I disliked the most about this sub are the terminal connections (as shown in pics).

0 of 0 found this helpful

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Robert

Villas, NJ

Overall
Durability
Value
Features
Design
Usability
Unimpressed

September 9, 2013

I love RE Audio but these subs actually did not impress me at all. Didn't last long in my set-up. Replaced them with nvx nsw 12s. For the price I guess they are okay. Slacking RE audio, slacking.

0 of 0 found this helpful

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lesser evil

Seattle

Overall
Durability
Value
Features
Design
Usability
Amazing subwoofer

July 8, 2012

Running this at 2ohms in a sealed trapezoid box with 1.5cubic feet. powered by PPI amp rated at 240w. using PPI's 'low pass x-over' set to 45hz, this little woofie gives me great bass, and low tones comparible to (but not equal to SPL) as my old school 15"phoenix gold DVC's. point here is that it provided very deep notes with silky smooth tones that make some normal songs sound AWESOME granted, i tuned the trunk to act like a 5th order setup, but this speaker does perform much better then i expected after reading a poor review of it. simply, if you have quality power pushing it, and know how to tune a box, and know how to tune your car, this itty bitty subwoofer will sound great. now, i bought this subwoofer for a few reasons. 1. it doesn't need a big amp to perform correctly 2. its light, no frills, no stupid junk..just a dvc with great the right profile for my car 3. affordable 4. looks durable (again, no fancy crap, spring loaded junk, or whatever..just a solid speaker) if i blow this woofer, i will buy another one...i am impressed with it i wish i knew how large the voice coil is. but i cant say enough about what ive heard sofar, and now i want to test it with a direct battle with my other car that has twice as much power and 5 times as much $$ into it...i think its very very close this also comes with a very thick rubber gasket to protect the outer ring and keep an airtight seal (that i didnt use) and will help the diy'ers that have imperfect mounting faces..(this is very important btw) i will write another review after it gets broken in, and i can do some testing, and battling on it...also with a smaller enclouser too.

0 of 0 found this helpful

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Pancho

Nevada

Overall
Durability
Value
Features
Design
Usability
Reliable entry level subwoofer.

June 8, 2012

I initially purchased this subwoofer to replace my home theater subwoofer as it was no longer adequate for my needs. I understand that this product is directed towards automotive applications but it functions beyond my expectations reproducing window rattling home cinema bass. Overall this is a good product if you're looking for more "BOOM" at a reasonable price.

0 of 0 found this helpful

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Jamey

Hartwell, GA

Overall
Durability
Value
Features
Design
Usability
ok

April 7, 2012

They are not what i expected. They're ok for beginners but I did not like them.

0 of 0 found this helpful

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Bradley

Davison, MI

Overall
Durability
Value
Features
Design
Usability
IMPRESSIVE FOR PRICE, WELL MADE!!!

January 30, 2012

If your not lookin to spend hundreds on a sub but you want a quality product, RE is the way to go. This model is perfect if your wanting great sounding mid to low notes, if your lookin for boomier higher power sound RE has your back there too with their lineup all the way too the beast xxx. All in all a very well made sub, minus the hookup terminals, push terms would be nice, but that would be the only con.

0 of 0 found this helpful

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jerd

vancouver wa

Overall
Durability
Value
Features
Design
Usability
A++++

January 3, 2012

Had this for 6 months now, could not be happier with the quality for this price. Amazing product and great deal.

0 of 0 found this helpful

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Josh

McMinnville, OR

Overall
Durability
Value
Features
Design
Usability
Very High Quality Sub for low power

August 3, 2011

Very nice low power sub sounded very good @115 watts 8ohms, I recently rewired it to 2ohms @over 300 watts rms and has no problems taking the power. I would recommend this sub to people who want good full clear bass you can feel, but not if you want shake to the neighborhood.

0 of 0 found this helpful

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JP

Huntington, WV

Overall
Durability
Value
Features
Design
Usability
Great in Ported box

June 14, 2011

My friend, had this sub in the RE Jambox (ported sub enclosure), it made this "entry" level sub sound way louder than you would expect. He also only had a soundstream mini-amp to power the sub (175w rms) [placed/drilled on the side of the box] . Also the sub has been running for about 2 yrs now and he doesnt listen lightly.

0 of 0 found this helpful

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ty74bulk

ut

Overall
Durability
Value
Features
Design
Usability
A

April 22, 2011

All I can say is they are awsome! but I need a little more kick so I am upgrading to the SEX series!

0 of 0 found this helpful

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Rod

Tooele, Utah

Overall
Durability
Value
Features
Design
Usability
Great econo sub!

April 10, 2011

I wanted some good bass in my 03 Chevy standard cab truck but didn't have the room for a very big box. My friends at Sonic hooked me up with an Absolute SAG 12 sub box. I had my doughts but the RE Audio REX12 sub woofer sounds great in that small box! Thanks Sonic Eletronix!

0 of 0 found this helpful

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WICKED RICK

PEAR,MS

Overall
Durability
Value
Features
Design
Usability
RE Audio REX12

March 30, 2011

I own two of these subs, being driven by us Amp d 1500 sub amp in my 328i BMW and I get stopped all the time by people wanting to know what subs are hitting that hard and so clear! They are great, don't be afraid to try them. I promise, you want be disappointed!

0 of 0 found this helpful

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daniel clarke

Malaysia

Overall
Durability
Value
Features
Design
Usability
Great sub for below 100

March 8, 2011

It's the best sub for below 100 .. Better than any entry level subs out there .. installed it in my gf car .. I've used before JL' , JBL , Rockford etc accuracy as good as JL power as good as RF and JBL's.. tho I'm underpowering it with a small Hifonics 4 channel and running it on a 1.2 cubic feet sealed box I'm really happy with the sub ..

0 of 0 found this helpful

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usampsfan

Muncie, IN

Overall
Durability
Value
Features
Design
Usability
RE Audio=Amazing

October 17, 2010

I purchased two of these with the Re XTv2 800.2 Amplifier and all i can say is wow! i have these in a regular cab S-10 with a 3.0 cu ft. ported box tuned to 45htz and I'm hitting 124DB!

0 of 0 found this helpful

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Jeff

Eastport, NY

Overall
Durability
Value
Features
Design
Usability
Honestly all i can say is wow

September 28, 2010

i recently bought 6 of these and have them only on 1000 watts they don't even heat up and it's one of the more impressive set ups I've had. (i've had 4 15s, 21s, 18s) for the money you definitely can NOT go wrong with these, i've spent hundreds on other setups but this one was one of the cheaper yet loudest, you cannot beat these for the money. im planning on buying 6 more in the near future, great stuff

0 of 0 found this helpful

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none

Kenner, LA

Overall
Durability
Value
Features
Design
Usability
amazing subs

June 22, 2012

i got 2 of these and for they sound amazing..,if your looking for just some bass with a little hit these will do but if your looking for more hit and rattle go with some higher powered subs

0 of 1 found this helpful

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BRAD

Davison,MI

Overall
Durability
Value
Features
Design
Usability
BLOWN IN ONE DAY

February 3, 2012

WELL scratch my old review, I hooked up this sub to a rockford amp pushin about 200rms @ 2ohms. It sounded good I was liking it for such a cheap sub. Played music for a half hour and the sucker started smoking and its done for!!!

0 of 2 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

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 $1.99

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

Impedance Meter / Signal Generator

Easy to locate tuning frequencies of passive radiators and ported enclosures

Your Price $299.99

1 RE Audio REX12D4 Subwoofer

Mono Amp

2 Channel Amp - Bridged

2 RE Audio REX12D4 Subwoofers

Mono Amp

Mono Amp - Option 1

2 Channel Amp

2 Channel Amp - Bridged

4 Channel Amp - Bridged

3 RE Audio REX12D4 Subwoofers

Mono Amp

4 Channel Amp

4 RE Audio REX12D4 Subwoofers

Mono Amp

2 Channel Amp

2 Channel Amp - Bridged

4 Channel Amp

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Why did you choose this?
Sonic Electronix Store
Great sound quality as well as power for the price they cant really be beat
Macgyver F on Aug 25, 2014

Product Summary

Manufacturer

Model Number

REX12D4

UPC

611892991033

Weight

8.50lbs

Internal SKU

rex12d4

Internal Product ID

27302

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 REX12D4