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Alphasonik PSW912

Dual 2 ohm 12" Mayhem 900 Series Subwoofer

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Alphasonik PSW912

Dual 2 ohm 12" Mayhem 900 Series Subwoofer

$179.95

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25 ft. of Streetwires 12 Gauge Speaker Cable

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20 Square Feet of Sound Dampening Material

NVX Sound dampening is thicker than competitors, eliminates rattles and gives you bigger bass!

$53.99

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2" Universal, Professional Heavy Duty Roller for Sound Damping/Dampening

Universal rubber roller to make it easy to install sound dampening.

$7.99

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  • PSW912 Mayhem 900 Series Dual 2 ohm Subwoofer
  • Power Handling:
    • RMS: 2200 watts
  • Cast Aluminum Machine Cut "Alpha" Basket
  • Motor Assembly Heat Sink
  • Ultra Light 2-Layer Carbon Fiber, Kevlar Cone with Aluminum Dust Cap
  • New TLTF J-Surround
  • Flat Progressive Rate Nomex Damper with Spiral-Woven Leads
  • 8 Guage Lug-Lock Input and Output Terminals
  • Sensitivity: 93 dB
  • Frequency Response: 45 - 900 Hz
  • 200 oz. Triple Stacked Magnet
  • 3" Voice Coils
  • 1-year SonicElectronix.com warranty

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"
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.
2200 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.
2 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).
45 - 900 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".
93 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.
14.5 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.
Kevlar Fiber
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.
High-Tensile 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

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.

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.
.75 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.
1.25 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.
11-3/8"
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.
10-3/4"

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
Manufacturer

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
83%
4 Star
8%
3 Star
8%
2 Star
0%
1 Star
0%

Average Attribution Rating

Durability
4.6
Value
4.6
Features
4.8
Design
4.9
Usability
4.9
stuff

Cordova TN

Overall
Durability
Value
Features
Design
Usability
Alphasonik Mayhem

August 29, 2009

Great sub and it's very loud but it didn't last very long though and if you played it hard you could smell the voice coil burning all the time. I only had about 1800 watts going to it with about 8v of line drive.

I wouldn't purchase another one being that the frequency response isn't very low and it burned up pretty quick.

9 of 10 found this helpful

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Brad F

Roxbury, PA

Overall
Durability
Value
Features
Design
Usability
I don't know what other reviewer was talking about.

September 18, 2009

I have 2 of the PSW912 (and I have owned them for over a year now). I think the other reviewer was probably either under powering them or simply abusing them...not to say I don't put them through torture, but these things are insane. I have 2 Alphasonik PMA1200DA, 1 connected to each at 1 ohm each amp and I get compliments all the time. The bass is unbearable at full volume (it's that loud) and if I go to the golf course with it up even at 50% they complain inside the clubhouse about it.

7 of 8 found this helpful

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Nate

Dayton, OR

Overall
Durability
Value
Features
Design
Usability
OMG WOW!!!

April 19, 2012

I have owned this sub for over a year now, in a tuned ported box built to spec. I am powering the sub at 1ohm 3200 watts and it eats it like candy. I will attempt to put more power to it next week. There has been no burning smell of the voice coil and it definitely hits every note. Thank you Sonic Electronix for the awesome investment.

6 of 7 found this helpful

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ModBox

Taylors Falls, MN

Overall
Durability
Value
Features
Design
Usability
Great Value! BEST SUB I HAVE EVER OWNED BY BRAND!!!

December 29, 2010

Best sub ever owned I have been bumping this on 1800rms amp @ 1 ohm no voice coil smell unless you clip the subwoofer I have a clip meter on my amp so when it struggles to get drive line that isn't there it shows me so I can turn it down till I upgrade to H/O alternator 200amp to make clean power these do take more than 1800 RMS if you provide a clean signal at 14.4 volts if not amp will distort and clip and voice coils on any sub burn up! I I own two of these subs only need one.

6 of 7 found this helpful

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Jason

Michigan City, IN

Overall
Durability
Value
Features
Design
Usability
Awesome speaker

February 23, 2010

i have 2 of these speakers i love em, they sound really good...just make sure u have a very powerful amp around 2200 rms

6 of 7 found this helpful

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Craig K

Lawrenceburg, TN

Overall
Durability
Value
Features
Design
Usability
WOW!!!!!!

January 5, 2010

i have owned 1 of these subs i had it in a custom built box tuned at 30 hertz and it played all the way down to the lowest notes u could throw to it!! i had 1500 watts rms running at 1 ohm and was hitting 142.6 DB tested by a local car audio shop! that other guy just didnt know what he was doing! i am a certified installer and greatly recommend these subs!!!!!!!

6 of 7 found this helpful

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TK

Scottsdale , AZ

Overall
Durability
Value
Features
Design
Usability
LOUD

November 8, 2010

I have one in the recommended Cu size sealed enclosure. Running a Power Acoustik lfa1 5500d class mono block with 1/0 gauge wire and a 1.2 farad capacitor. This thing hits so hard for one 12 it will blow your mind. Owned for about 1 week now with no issues so far. it handles every bit of the recommended 2200 rms. I figure I'm pushin just about that at 1 ohm from the amp

5 of 6 found this helpful

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tech

Mt. Vernon WA

Overall
Durability
Value
Features
Design
Usability
alphasonic bangs

October 25, 2010

For those seeking big bass on a low budget these are the sub compared to big named brand like Kicker Rockford Fosgate, Alpine, and MTX there's no one who will deliver such a bang for the buck great sub all around very powerful when combined with a good amp like the alpine 2000rm

5 of 6 found this helpful

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basspro

seattle, wa

Overall
Durability
Value
Features
Design
Usability
big bass

October 14, 2010

These sub really give you the bang for the buck own two and have them hook up to 1800rms each in a escape I'm the loudest on the block

5 of 6 found this helpful

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raul

Palmdale, CA

Overall
Durability
Value
Features
Design
Usability
awesome

August 26, 2010

For the price well worth sub I have it being pushed by JL audio 500/1 and its only one of these subs planning on getting another since well satisfied. If u love bass and on a budget would highly recommend. Bass is terrific in my opinion some brand names don't do this great sound

5 of 6 found this helpful

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axion

New York

Overall
Durability
Value
Features
Design
Usability
Excellent choice

March 4, 2011

I have a pair of these subs installed in my car for almost 2 years now and they really worth the investment. They hit very hard and nice. I receive a lot of compliments all the time. They are very loud and shakers. I recommend these subs 100%. I am purchasing another pair of these subs this week, for my 2nd car.

4 of 5 found this helpful

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Boxcar

Canada

Overall
Durability
Value
Features
Design
Usability
PSW 912 Review

February 11, 2011

I own 1 of these woofers in a nicely tuned ported enclosure. I am running a Soundstream Tarantula 2000D to it and its not bad. I'm not ecstatic with its performance for the specs it gives. I can always smell the fragrant aroma of burning voice coils in the air, and truthfully have already started the search for its replacement. I have only ran this woofer for 1 summer. If your operating on a low budget, this might be a good woofer for you. If you got the money to splurge, do the research and invest in something better, thats what I am doing. Amplifiers and all are going to be changed back to my old school RF Power series amps (1100a2/800a4). They just don't build em like they used to.

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

40 Square Feet of Sound Dampening Material

Thicker than the competition, complete sound damping kit for entire vehicle! Use for trunk, doors, roof and floor.

Your Price $97.99

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 $64.99

Stinger Sound Dampening Bulk Kit

Stinger's Roadkill sound dampening series is sure to kill unwanted road noise and rattles! Enough sound dampening for the whole car!

Your Price $94.97

Dynamat Sound Dampening Trunk Kit

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

Your Price $94.95

Dynamat Sound Dampening Bulk Kit

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

Your Price $159.99

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

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

1mm All Purpose Solder

Solder is all purpose for use on most projects where solder is needed.

Your Price $7.99

12 oz. Can of Adhesive Spray

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

Your Price $8.99

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 $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

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 Alphasonik PSW912 Subwoofer

Mono Amp

Mono Amp - Option 1

2 Channel Amp - Bridged

2 Alphasonik PSW912 Subwoofers

Mono Amp

2 Channel Amp

4 Channel Amp - Bridged

3 Alphasonik PSW912 Subwoofers

Mono Amp

Mono Amp - Option 1

4 Channel Amp

4 Alphasonik PSW912 Subwoofers

2 Channel Amp

4 Channel Amp

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Product Summary

Manufacturer

Model Number

PSW912

UPC

820291002572

Weight

42.00lbs

Internal SKU

psw912

Internal Product ID

7072

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: Alphasonik PSW912