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RE Audio SX18D4 (SX18 D4)

1000W 18" SX Series Dual 4 ohm Subwoofer

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• RMS Power: 1000W
• Dual 4 ohm
• Rubatek Foam Surround
• Dual Composite 2-Piece Cone
• Tork-Tite Terminals
• Progressive Spiders
• Triple Stacked Magnets

Learn more about the sx18d4

Good news and a little bad...

This item has been discontinued

But you may be interested in the newest model that's available.

sxx18d4 thumbnail

RE Audio SXX 18 (SXX18D4)

OUR PRICE: $249.99

View item

Product Highlights


• RMS Power: 1000W
• Dual 4 ohm
• Rubatek Foam Surround
• Dual Composite 2-Piece Cone
• Tork-Tite Terminals
• Progressive Spiders
• Triple Stacked Magnets

Description


RE Audio brand icon

Authorized dealer



RE Audio SX Subwoofers

RE Audio raises the bar for high output with the SX line of their competition grade, high excursion subwoofers. With an impressive power handling rating of 1000 Watts RMS – this subwoofer shows you it’s meant for those serious about quality bass.

Every single component of this subwoofer has been crafted with precision in mind to obtain full, impactful bass. From its 3” eight layer aluminum flat voice coil, to its triple stacked magnets this high powered subwoofer will output with fine clarity.

The entire SX line of subwoofers can handle an impressive 1000 watts of RMS continuous power, no matter the size! With its large Rubatek Foam surround and FEA optimized motor structure; this woofer can handle large amounts of power, while maintaining durability. The RE Audio SXX Subwoofers series is certainly one subwoofer manufactured with hi-fidelity audio in mind.

Subwoofer Features:
  • 18" Dual 4 ohm SX Series Car Subwoofer
  • Power Handling:
    • RMS: 1000 watts
  • Impedance: 4 ohm
  • Dual composite 2-piece cone
  • Rubbertek Foam Surround
  • Tork-Tite terminals
  • Cast aluminum basket
  • 3" 8-layer aluminum voice coil
  • Triple stack magnets
  • Hand-built in the USA
  • Authorized Internet Dealer
  • 1-year Manufacturer's warranty

Subwoofer Dimensions:

  • Mounting Depth: 9.5"
  • Mounting Hole Diameter: 16.75"
  • Overall Diameter: 18.5"
  • Bolt Hole Circle: 17.5"
  • Motor Width: 6.5"
  • Motor Depth: 3.25"
  • Basket Depth: 6.25"
  • Displacement: 0.22 cu. ft.
  • Weight: 28 lbs.
SX 18" T/S Parameters
  • Electrical Q Value -Qes: 0.53
  • Mechanical Q Value -Qms: 6.1
  • Total Speaker Q Value -Qts: 0.48
  • Free Air Resonance -Fs: 33.2 Hz
  • Equivalent Compliance -Vas: 159 liters
  • One-Way, Linear Excursion -Xmax: 22 mm
  • Efficiency -SPL 1W/1m: 92.7 dB SPL
  • Effective Piston Area -Sd: 1210 cm^2
  • DC Resistance -Re: 1.9 ohm
  • Nominal Impedance -Znom: Dual 4 ohm
  • Thermal Power Handling -Pe: 1000 W
  • Force Factor -Bl: 21

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

Product history:

RE Audio SXX18D4 thumbnail
(newest, current model)
RE Audio SX18D4 thumbnail
(previous model, replaced by RE Audio SXX 18 (SXX18D4))

Subwoofer Wiring Guide


Wiring Guide to Wire 1 RE Audio SX18D4 (SX18 D4) Subwoofer

Mono Amp

2 Channel Amp - Bridged

Wiring Guide to Wire 2 RE Audio SX18D4 (SX18 D4) Subwoofers

Mono Amp

Mono Amp - Option 1

2 Channel Amp

2 Channel Amp - Bridged

4 Channel Amp - Bridged

Wiring Guide to Wire 3 RE Audio SX18D4 (SX18 D4) Subwoofers

Mono Amp

4 Channel Amp

Wiring Guide to Wire 4 RE Audio SX18D4 (SX18 D4) Subwoofers

Mono Amp

2 Channel Amp

2 Channel Amp - Bridged

4 Channel Amp

Specifications & Details


Subwoofer Specifications
Series
SX Series
Subwoofer Size
18"
RMS Power Handling
1000 watts
Voice Coil(s)
Dual
Impedance (Per Voice Coil)
4 ohms
Voice Coil Diameter
3"
Sensitivity
92.7 dB
Xmax (millimeters)
22 mm
Subwoofer Design
Round / Circle
Main Cone Color
Black
Woofer Composition
Dual composite 2-piece cone
Woofer Surround
Rubatek Foam
Magnet Structure
Triple Stacked
Subwoofer Grille
No
Re-Cone Kit Available
No
Recommended Enclosure Specifications
Recommended Enclosure Type
Ported / Vented
Minimum Ported Box Volume
5.5 cubic feet
Maximum Ported Box Volume
8.0 cubic feet
Top-Mount Depth (Mounting Depth)
9-1/2"
Cutout Diameter
16-3/4"
Shallow Mount Installation
No
Electromechanical Parameters
Free-Air Resonance (Fs)
33.2 Hz
Equivalent Compliance (Vas)
159 liters
Total Speaker Q Value (Qts)
0.48
Electrical Q Value (Qes)
0.53
Electrical Resistance of Voice Coil (Re)
1.9 ohms
Mechanical Q Value (Qms)
6.1
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

Item Details


Manufacturer:

Model Number:

SX18D4

Weight:

42.00lbs

Internal SKU:

sx18d4

Internal Product ID:

30162

Product and How-to Videos


  • RE Audio New Product Line Overview | CES 2015
  • Car Subwoofer Size Buying Guide | What Size of Sub Should I Get?

Customer Ratings & Reviews



5 star
73%
4 star
27%
3 star
0%
2 star
0%
1 star
0%



Durability
4.8
Value
5
Features
4.7
Design
4.4
Usability
5

Customer Reviews

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Great Subwoofer

This thing is LOUD. Some people claimed that this subwoofer was only good for SPL and that it lacked sound quality. Well I'm nothing but impressed with this thing. I have it in a 1.2 cubic foot box tuned to 28 Hz in the back of a 20006 Expedition Limited. People are shocked when they hear how loud and low it gets.

Pros: Priced fairly, LOUD, DEEP, durable

Cons: Takes up a lot of room, things in my car are starting to break, (Specifically in my doors) Hearing loss.

By Dexter on December 15, 2011

29

found this helpful.

Durable DD sub

I am currently running 2 RE Audio SX18D4 subs off of an Audioque AQ3500.1D amplifier @ 1 ohm. The subs are rated at 1000 watts rms, and the amplifier puts out 4300 watts rms @ 1 ohm. Yeah these are that durable and under rated. I honestly didn't expect them to last very long at all. The truck has a 320 amp alt, 2 yellowtops, 4 runs of 0 ga, and 8ga wire to each sub so the amp is giving them hell, and they just slam and take it. I only smell the voice coils when it hits the low 15-25hz notes for long periods of time. With clean clip free power, these subs will play forever on around 1k watts. I had them on a Hifonics BRZ2400.1D and it could really only make one loud at a time. They have a sweet spot for longevity and sound at somewhere around 1500 watts rms.

By James on April 23, 2012

24

found this helpful.

impressd

I bought this amazing shipping time, good quality!!!!!!

By casper on October 6, 2011

24

found this helpful.

Very good value

The RE SX18D4 are awesome subs for entry level as well as the serious competitor.

By shudo64 on October 19, 2012

23

found this helpful.

Awesome Sub!

This sub is impressive! It may be rated 1000 watts thermal power handling but if it were rated 2000 watts RMS, it would be conservative. The XMAX on this sub is true and not just total linear movement. I am using it for car audio competition and it doesn't disappoint,150+ db by itself in stock and street beat. Plus, that is without beginning to tune and modify to gain ever little db possible. This thing has an incredible voice coil when you look at it through the spider. This thing is built to last, pound and made in USA! This is one of the most incredible subs I have ever seen in its class. If you buy this thing, you made the right decision, you won't be disappointed.

By Jordan on October 13, 2014

20

found this helpful.

all i can say is Baaaaaaassssssss!!!

I have 2 of these monster in my suv and damn,,,,,real top of the line hard hitters i love them,matter of fact im thinkin bout ordering 2 more

By Dubank on February 13, 2013

20

found this helpful.

Great product

I have 2 of these running off of a Hifonics Zeus ZRX 3000 and its crazy. Break them in properly and they will be your friend forever. I have them ported through my rear dash and if I try to look into the port it has me breathing like Hannibal Lecter in "Silence of the Lambs" when he said "I ate his liver with some Fava beans and a nice Chianti"

By Mike Frost on June 12, 2012

20

found this helpful.

GOOD 18? 4 the price$$$

DEEP-LOUD-CLEAN-CHEAP= BUY IT NOW-MAKE ROOM WHAT YOU WAITING FOR HA! HA!

By DIExNxRAGE on May 31, 2011

20

found this helpful.

2 18's re audio sx

these speakers pound so hard, each 18 is ran by 1000/1 jl amp..

By jack on April 2, 2012

20

found this helpful.

A Monster

I got this thing shipped across the country in 6 days. It's way bigger in person. The spider is stiff as a board. Be sure to ease into flexing the thing at full tilt. I had it running free air on 2000 watts at 4 ohms. I couldn't push the cone up or down but apparently when 2000 watts of power is pushing it, it has an inch of excursion. It shook my truck more than my two orion 10's AND ITS NOT EVEN IN THE BOX YET.
I put it in a 10ft. cubed box sealed. When the low note hit on White Girl, all i could do is laugh and gasp for air. I went inside my restaurant because thats the only place i could test this thing without the cops being called. I could feel the bass on the counters! And the doors were shaking. I was around 15 feet away from the door at the time. I went home and on my way there i stopped at a red light. Obviously i turned it up to the Maxx and the trucks tailgate in front of me was rattling. I AM TRULY PLEASED WITH THE RUCKUS I CAN CAUSE WITH THIS THING.

By Cody on January 31, 2012

20

found this helpful.

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