Garage
Shop

See all parts that fit your 2004 Forester

MB Quart PWM304

500W 12" Premium Series Dual 4 Ohm Subwoofer

MB Quart
Shop all MB Quart
Product videos
highlight-star-icon

• 1000W Peak
• 500W RMS
• Carbon Fiber Cone and Dustcap
• UV Resistant Butyl Rubber Surround
• Quick Change Impedance Terminal
• Heat-Dispersing Vented Pole Piece

Learn more about the pwm304

We apologize

This item has been discontinued


Loading...
72-8104 main

Metra 72-8104

Install New Speakers in select 1990-2024 vehicles from Toyota, Subaru, Mitsubishi

87
-20.01%

$11.99

List price $14.99

98-8999 main

Metra 98-8999 Dash Kit

Install a new Double-DIN with Single-DIN car stereo in select 1993-2012 vehicles from Subaru, Mitsubishi

13
-42.12%

$21.99

List price $37.99

82-8901 main

Metra 82-8901

6.5" to 6.75" Speaker Adapter for select 1998-2021 vehicles from Subaru, Audi

3
-55.90%

$14.99

List price $33.99

72-9300 main

Metra 72-9300

Install New Car Speakers in select 1976-2015 vehicles from Subaru, Nissan, Mazda

8
-40.03%

$8.99

List price $14.99

70-8901 main

Metra 70-8901 Wiring Harness

Install a new car stereo in select 1990-2013 vehicles from Subaru

12
-30.03%

$6.99

List price $9.99

Limited time!
46CSC654 main

Kicker CSC65 (46CSC654)

600W Peak (200W RMS) 6.5” CS Series 2 Way Coaxial 4-ohm Speakers

122
-33.36%

$79.96

List price $119.99

NSP65 main

NVX NSP65

540W Peak (180W RMS) 6.5" N-Series 2 Way Coaxial Car Speakers

93
-35.19%

$69.99

List price $107.99

UTE-73BT main

Alpine UTE-73BT

Single DIN Digital Media Receiver with Bluetooth (SiriusXM Ready)

43
-16.69%

$149.95

List price $180.00

VSP65 main

NVX VSP65

600W Peak (200W RMS) 6.5" V-Series 2 Way Coaxial Car Speakers

64
-15.39%

$109.99

List price $129.99

XSP652 main

NVX XSP652

600W Peak (200W RMS) 6.5" X-Series 2 Way Coaxial Car Speakers

19
-33.34%

$119.99

List price $179.99

Product Highlights


• 1000W Peak
• 500W RMS
• Carbon Fiber Cone and Dustcap
• UV Resistant Butyl Rubber Surround
• Quick Change Impedance Terminal
• Heat-Dispersing Vented Pole Piece

Description


MB Quart brand icon

Authorized dealer

General Features:

  • 12" Dual 4 Ohm Premium Series Subwoofer
  • Power Handling:
    • Peak: 1000 watts
    • RMS: 500 watts
  • Impedance: 4 ohm
  • Carbon fiber cone and dustcap
  • UV Resistant butyl rubber surround
  • Red nomex spider
  • Quick change impedance terminal
  • 2-1/2" High temperature voice coil
  • Anti-resonant magnet cover with deep drawn stamp steel basket
  • Heat-dispersing vented pole plate
  • Resonance Frequency (Fs): 27 Hz
  • Top-mount depth: 6-11/16"
  • Sensitivity: 84dB
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

Subwoofer Wiring Guide


Wiring Guide to Wire 1 MB Quart PWM304 Subwoofer

Mono Amp

2 Channel Amp - Bridged

Wiring Guide to Wire 2 MB Quart PWM304 Subwoofers

Mono Amp

Mono Amp - Option 1

2 Channel Amp

2 Channel Amp - Bridged

4 Channel Amp - Bridged

Wiring Guide to Wire 3 MB Quart PWM304 Subwoofers

Mono Amp

4 Channel Amp

Wiring Guide to Wire 4 MB Quart PWM304 Subwoofers

Mono Amp

2 Channel Amp

2 Channel Amp - Bridged

4 Channel Amp


Loading...
Limited time!
46CSC654 main

Kicker CSC65 (46CSC654)

600W Peak (200W RMS) 6.5” CS Series 2 Way Coaxial 4-ohm Speakers

122
-33.36%

$79.96

List price $119.99

Limited time!
46CSC6934 main

Kicker CSC693 (46CSC6934)

900W Peak (300W RMS) 6x9” CS Series 3 Way Coaxial 4-ohm Speakers with Integrated Midrange Speakers

40
-30.02%

$111.96

List price $159.99

43DSC6504 main

Kicker DSC650 (43DSC6504)

480W Peak (120W RMS) 6.5” DS Series 2-way 4-ohm Coaxial Car Speakers (DSC6504)

28
-10.53%

$84.99

List price $94.99

DB652 main

Polk Audio DB652 (DB 652)

600W Peak (200W RMS) 6.5" DB+ Series 2 Way Coaxial 4-ohm Car, Marine and Powersports Speakers

12
-9.16%

$109.00

List price $119.99

Limited time!
Club 622 main

JBL Club 622

360W Peak (120W RMS) 6.5" Club Series 2-way Coaxial 3-ohm Speakers

5
-28.58%

$99.95

List price $139.95

CV15BT main

Cerwin-Vega CV15BT

Single Din Digital Media Receiver with Bluetooth

3
MPK 163.3 main

Hertz MPK163.3

600W Peak (300W RMS) 6.5" Mille PRO Series 3-way 4-ohm Component Speaker System

2
-14.89%

$999.99

List price $1175.00

PNW-65CS2 main

AudioControl PNW-65CS2

250W Peak (200W RMS) 6.5″ PNW Series 2 Way Component 3-ohm Speakers

4
-5.90%

$319.00

List price $339.00

SXE-6926S main

Alpine SXE-6926S

280W Peak (90W RMS) 6x9” SXE Series 2-way 4-ohm Coaxial Speakers

13
-20.84%

$56.99

List price $71.99

NSP65 main

NVX NSP65

540W Peak (180W RMS) 6.5" N-Series 2 Way Coaxial Car Speakers

93
-35.19%

$69.99

List price $107.99


Best selling similar products

Marine Club 12 small

JBL CB122 Club Marine 12

• Peak Power: 1200 watts
• RMS Power: 400 watts
• Polypropylene Cone
• Rubber Surround
• Impedance: Single 4 ohm
• Mount depth: 7-13/16"
• Sensitivity: 89 dB

(1)

$119.95

List price $379.95

VCW124v3 small

NVX VCW124 Version 3 (VCW124v3)

• Peak Power: 2400 watts
• RMS Power: 1200 watts
• Impedance: Dual 4 ohm
• Carbon Fiber Enhanced Non-Pressed Paper Cone
• Custom High Roll Foam Surround with black nylon stitching
• Mount depth: 7.02"
• Sensitivity: 85 dB (1W/1m)

(132)

$239.99

List price $287.99

12W6v3-D4 small

JL Audio 12W6v3-D4

• RMS Power: 600 watts
• Impedance: Dual 4 ohm
• Mineral-Filled Polypropylene Cone
• Butyl Rubber Surround
• Mount depth: 7.52"
• Sensitivity: 85.4 dB

(25)

$949.99

List price $949.99

SQW124 small

NVX SQW124

• Peak Power: 1200 watts
• RMS Power: 600 watts
• Impedance: Dual 4 ohm
• Polypropylene Cone
• Rubber Surround
• Mount depth: 3.51"
• Sensitivity: 84 dB

$299.99

List price $359.99

P3D4-12 small

Rockford Fosgate Punch P3 P3D4-12

• Peak Power: 1200 watts
• RMS Power: 600 watts
• Impedance: Dual 4 ohm
• Anodized Aluminum Cone
• Santoprene Rubber Surround
• Mount depth: 6.66"
• Sensitivity: 85 dB

(134)

$229.99

List price $259.99

SRX1240 small

Memphis SRX1240

• Peak Power: 500 watts
• RMS Power: 250 watts
• Impedance: Single 4 ohm
• Polypropylene Cone
• Rubber Surround
• Mount depth: 4.92"
• Sensitivity: 85 dB

$89.99

List price $139.95

SW-M12D2 small

Sundown Audio M-12 D2 12" (M12D2)

• Peak Power: 4000 watts
• RMS Power: 2000 watts
• Impedance: Dual 2 ohm
• Polypropylene Cone
• High Roll Foam Surround
• Mount depth: 10.88"
• Sensitivity: 80.6 dB

(1)

$599.99

List price $719.99

VCW122v3 small

NVX VCW122 Version 3 (VCW122v3)

• Peak Power: 2400 watts
• RMS Power: 1200 watts
• Impedance: Dual 2 ohm
• Carbon Fiber Enhanced Non-Pressed Paper Cone
• Custom High Roll Foam Surround with black nylon stitching
• Mount depth: 7.02"
• Sensitivity: 85 dB (1W/1m)

(94)

$239.99

List price $287.99

Stage 122 small

JBL Stage 122 (JBLSUBST122AM)

• Peak Power: 1000 watts
• RMS Power: 250 watts
• Impedance: Single 4 ohm
• Polypropylene Cone
• Rubber Surround
• Mount depth: 6"
• Sensitivity: 91 dB

$109.95

List price $129.95

YSW122 small

NVX YSW122

• Peak Power: 1600 watts
• RMS Power: 800 watts
• Impedance: Dual 2 ohm
• Enhanced Pressed Paper Cone
• High Roll Foam Surround
• Mount depth: 6.5"
• Sensitivity: 85 dB

(3)

$149.99

List price $227.99

Specifications & Details


Subwoofer Specifications
Series
Premium Series
Subwoofer Size
12"
Peak Power Handling
1000 watts
RMS Power Handling
500 watts
Voice Coil(s)
Dual
Impedance (Per Voice Coil)
4 ohm
Voice Coil Diameter
2-1/2"
Sensitivity
84 dB
Xmax (millimeters)
14.5 mm
Subwoofer Design
Round / Circle
Main Cone Color
Black
Woofer Composition
Carbon Fiber
Woofer Surround
Butyl Rubber
Magnet Structure
Single Stacked
Subwoofer Grille
No
Re-Cone Kit Available
No
Recommended Enclosure Specifications
Recommended Enclosure Type
Ported / Vented
Sealed
Optimum Sealed Box Volume
1.25 cubic feet
Minimum Ported Box Volume
1.5 cubic feet
Optimum Ported Box Volume
2.5 cubic feet
Top-Mount Depth (Mounting Depth)
6-11/16"
Cutout Diameter
10-7/8"
Shallow Mount Installation
No
T/S Parameters (Electromechanical)
Free-Air Resonance (Fs)
27.25 Hz
Equivalent Compliance (Vas)
59.911 liters
Total Speaker Q Value (Qts)
0.606
Electrical Q Value (Qes)
0.746
Electrical Resistance of Voice Coil (Re)
7.2 ohm
Mechanical Q Value (Qms)
3.252
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

Item Details


Manufacturer:

Model Number:

PWM304

Weight:

18.50lbs

Internal SKU:

pwm304

Internal Product ID:

67894

Product and How-to Videos


Customer Ratings & Reviews


MB Quart PWM304 thumbnail image

5 star
80%
4 star
20%
3 star
0%
2 star
0%
1 star
0%



Durability
4.8
Value
3.8
Features
5
Design
4.8
Usability
5

Customer Reviews

Sort by:

Loading...

Rich Deep Bass

So i pulled the trigger. Seems like I'm the first one too! There is a huge lack of reviews for this subwoofer. I've searched the internet high and low and never found but maybe 1 so let me get started!

The speaker itself: MB Quart put the time and effort into designing and building this subwoofer. It is very well made with nice spring loaded hideaway terminals, a beefy rubber surround, woven fiber cone, heavy magnet, and very lightweight but STRONG basket. It is certainly unmistakable for their "premium" line of speakers. I really like the selectable impedance feature which is also fused to protect the voice coils. In theory you shouldn't ever be able to run too much wattage through them and cause the coils to blow. I'm powering it with a Rockford Fosgate R500X1D which i bought from Sonic. A perfect match to the subwoofer producing 500 watts at 2 ohms.

Onto the sound: I have it in a sealed 1.25 cubic ft Ground Shaker box (also bought here) and it sounds tight and clean! For the record I'm a 10" sub type of guy and would never use anything other than a sealed enclosure for accuracy. Jazz, classical, swing, and very musical compositions in general sound fantastic. I'm very impressed with the reproduction of bass drums kicking and string basses playing. I thought it would be boomy or muddy (because I'm the 10" subwoofer guy) but it wasn't! Now because I want to be fair and right a review for everybody, i had to play some hip hop and trap music for all the bass heads. Here's the deal on that.... I think we all can agree 84 decibels of sensitivity is on the low side. That said at 500 watts RMS, the bass comes through loud and clear, but if you want it to shake your mirrors off, you're better off with 2 and probably in a ported box. MB Quart even states in their description on their site that this subwoofer is intended to be musical and not for the SPL crowd of people and I agree! I'm a big band swing/ jazz listener so it suits my needs and adds the perfect amount of clean accurate bass to my setup. Overall I think it's worth checking out for sure. I know there are a lot of subwoofers out there under $100 that are amazing and I know that's why there are next to no reviews for this item. That and the Maxxsonics ownership which I get it...they are lower end, but you inevitably get what you pay for and a higher priced MB Quart subwoofer comes with a higher quality build. I love Sonic Electronix and definitely a customer for life with them, but if they want this sub to sell, they need to come down on price to match their competitors which is why I gave it 3 stars on value. Other than that, I'm happy!

By joseph on March 20, 2014

31 found this helpful


good but.....a little high

im piggy back off the first review i woulndt pay 200 bucks for a 10 inch sub
when i could get most 15 inch subs for a little more money but like the first reviewer said if thats your thing pay the 200 but im a 15inch guy i woundt use any thing other than that siz driver its a great quality sub dont get me wrong just kinda steep in price....and sonic is absolutly the only place i order from iv done business withh them on 3 occasions and each time it was flawless .......

By d.j.keys on June 10, 2014

21 found this helpful


TRANSIENT HEAVEN!!!!

if u spend ten times more you can get better but there no point in spending that this is Taylor made for all music and can satisfy sq,spl,splq. Subs I've owned that it is better than are as follows, sundown sa Polk mm Polk dxi power acoustic mofo jbl gto pioneer champ pro kicker cvr that's all I can remember but there's more. Seriously take a risk and trust me it will make u happy I promise. Again don't let people in forums tell u it's garbage maxxsonics I'm telling you this one is dark horse!!!! Enjoy and get ready to waste gas driving :)

By Melissa on August 8, 2015

10 found this helpful


Extremely clean accuracy

Clean and accurate on top of its fbeautiful to look at. Sounds good handles power and is well rounded for all genres really a great sub

By charles on September 27, 2015

4 found this helpful


Excellent sound quality and value!

The weekend I received the PWM304 I had mounted it in a belva box I got in a combo deal. The simplicity of the push terminals and Ohm selector make for an easy install. After getting hooked up to my home receiver to which I bought the subwoofer for, I was baffled by what I heard. There was no distortion and the bass was tight and accurate. After watching movies, playing video games and listening to music with it hooked up, I have nothing but positive things to say.

To anyone that is looking to buy a subwoofer for SPL, this is NOT your choice to go with. It was designed with sound quality in mind and there are better alternatives for the price, if that is what you are in to.

By Anthony on November 23, 2015

1 found this helpful




RH-200S small

Roland RH-200S

Stereo Over-Ear Noise Isolating Silver Headphones (Straight Cable)

$199.00

List price $199.00

XIX22 small

NVX XIX22 Open Box

X-Series: 2m (6.56 ft) 2-Channel RCA Audio Interconnect Cable

$12.99

List price $29.99

PWM-20 small

Power Acoustik PWM-20

4-Band Parametric Equalizer with Subwoofer Electronic Crossover

(2)

$49.99

List price $59.99

TH650.1D small

MTX TH650.1D

Monoblock TH Series Class D Car Amplifier

(1)

$239.95

List price $449.95

RH-IE3 small

Roland RH-IE3

In Ear Professional Stereo Monitor Ear-Bud Headphones

(1)

$199.00

List price $279.50

PMA800HCA small

Alphasonik PMA800HCA

$499.99

List price $899.99

PZ46 small

Saitek PZ46

Pc Pro Flight Instrument Panel

$169.99

List price $199.99

VOAB small

Scosche VOAB Antenna Adapter

Connect your factory antenna to a new aftermarket radio for select 1997-2009 vehicles from Volvo

(5)

$11.95

List price $13.95

Related Searches


Save up to 10 different vehicles in your garage
Vehicle
Store
Delete

2004 Subaru Forester

1979 Audi 5000

2001 Subaru Forester

2012 Audi A5

2016 Buick Regal

2013 Audi A5

2011 Buick Regal

2007 GMC Envoy

2000 Dodge Neon

2000 BMW X5

Add vehicle Clear all vehicles
Where to find vehicle info
Are you sure you want to clear your garage?
This action cannot be undone. Confirm
This page was not designed for products.
If you continue, you will be redirected to a category customized for your vehicle. Continue
Loading...
Identify your vehicle and submodel details
  • Owner's manual
  • Vehicle's insurance card
  • Vehicle registration
  • Vehicle produced after 2005: Inside driver's side door
  • Vehicle produced before 2005: Rear passenger doorjamb, glove box, center console, or engine compartment
Car Info Side Door Icon
Vehicle Registration Icon
Vehicle Insurance Icon

Modern vehicles often require specific brackets, wiring harnesses, and mounting solutions. A fit guide ensures:

  • You see only parts engineered for your exact vehicle
  • You avoid incompatible radios, speakers, or wiring
  • Installation is smoother, faster, and frustration-free
  • You get the correct accessories the first time

Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.