Garage
Shop

See all parts that fit your 2010 A3

Kicker KM124 (45KM124)

350W Peak (175W RMS) 12" KM Series Single 4-ohm Marine Subwoofer

Kicker
Shop all Kicker
Product videos
highlight-star-icon

• Peak Power: 350 watts
• RMS Power: 175 watts
• Impedance: Single 4 ohm
• Injection Molded Polypropylene Cone
• Santoprene Rubber Surround
• Mount depth: 5 1/2"
• Sensitivity: 88.1 dB

Learn more about the 45km124
Universal fit Icon

Universal – fits most vehicles.

Similar items | Update vehicle | Vehicle store
List price $279.99
Thanks , You Pay:
-11%

$249.99

 with warranty
Starting at $23/mo or 4 payments of $63 Buy now, pay later and installment payment plans are offered by Afterpay and Affirm. Learn more

Heads up

Your vehicle can use this product in multiple locations. Only a quantity of one can be selected from the product page. You will have the option to adjust the quantity within your cart.

shipping truck icon Free shipping in USA. Provide zip for delivery date.
Dollar Icon
VIP Product Get $25.00 in rewards to spend later
Quantity
Available: Ships in 10-14 days
Brand new

Buy it now


Acima Logo

No Credit Option

Flexible Lease Payments

Early Purchase Options

Quick Approval Decision

Extend logo

Keep your product protected longer! Extend the warranty after the manufacturer warranty expires. 

  • Hassle-free immediate replacement within minutes!
  • Easy online claims 24/7
  • Covers product breakdowns and failures
Swoosh Icon Icon of Swoosh

For over 25 years, we've been your X-Factor – the team dedicated to having the biggest impact on your shopping experience!

Award winning icon
Award-Winning Service
Shipping icon
FREE Shipping Orders $49+
60 days return policy icon
60-Day Easy Returns
lowest price guarantee icon
Guaranteed Lowest Price
inHouseExpert
In-House Experts

Loading...
Limited time!
DMX709S main

Kenwood eXcelon DMX709S

6.8" Double DIN Touchscreen Digital Multimedia Receiver with Bluetooth, Apple CarPlay, Android Auto (Sirius XM Ready)

20
-33.50%

$399.00

List price $600.00

DMX129BT main

Kenwood DMX129BT

6.8" Double DIN Touchscreen Digital Multimedia Receiver with Bluetooth

2
-26.30%

$199.00

List price $270.00

iLX-407 main

Alpine iLX-407

7" Double DIN Touchscreen Digital Multimedia Receiver with Bluetooth, Apple CarPlay and Android Auto (SiriusXM Ready)

7
-16.93%

$539.95

List price $650.00

Current Promotions (2 offers)


Get a Free roll of Belva 16 Gauge Speaker Wire. Simply click the "Add Both to Cart" button and you will see your savings at checkout. This offer cannot be combined with any other coupons or offers.

Kicker KM124 (45KM124)

100% off


Priced separately $262 98

Promo Savings of $12 99

Total price:

$249 99

Protect your subwoofer and enhance its look at no additional cost. Simply click the "Add Both to Cart" button and you will see your savings at checkout. This offer cannot be combined with any other coupons or offers.

Kicker KM124 (45KM124)

100% off


Priced separately $314 98

Promo Savings of $64 99

Total price:

$249 99

Product Highlights


• Peak Power: 350 watts
• RMS Power: 175 watts
• Impedance: Single 4 ohm
• Injection Molded Polypropylene Cone
• Santoprene Rubber Surround
• Mount depth: 5 1/2"
• Sensitivity: 88.1 dB

Description


Kicker brand icon

Authorized dealer

Marine Enclosure-Optimized Foundation

The Kicker 45KM124 is a flagship 12" marine transducer specifically engineered for sealed or ported enclosures, delivering a refined and authoritative low-frequency foundation for any vessel. Unlike free-air models, the KM12 is built to thrive in a controlled air environment, allowing for a tighter, more rhythmic bass response that is ideal for high-fidelity music reproduction. This driver features a single 4-Ohm voice coil, optimizing it for modern marine mono-channel amplifiers to ensure maximum power transfer and acoustic impact.

Built with Kicker's "Real Marine" certification, the 45KM124 is designed to withstand the most grueling conditions on the water. It features a UV-treated injection-molded polypropylene cone and a co-molded Santoprene surround for consistent, high-excursion performance. The assembly is anchored by a corrosion-resistant polymer basket and 316L stainless-steel hardware, while the UniPlate back plate and pole piece act as an integrated heat sink to prevent thermal fatigue. With its completely sealed motor and protective terminal cap, this 12" driver is the definitive choice for audiophiles seeking deep, punchy bass in a protected enclosure.

Product Details:

  • 12" Single 4 ohm KM Subwoofer Series Subwoofer
  • Power Handling:
    • Peak: 350 watts
    • RMS: 175 watts
  • ANSI/CTA-2031-A Compliant
  • Injection Molded Polypropylene Cone
  • Co-molded Santoprene Rubber Surround
  • UniPlate Back Plate and Pole Piece
  • Thick tinsel leads construction
  • Large ceramic magnet motor structure
  • Polymer basket resists corrosion
  • Protective terminal cap
  • Stainless mounting hardware included
  • Meets or exceeds ASTM standards for UV and Salt/Fog Exposure
  • Black LED grille available Kicker KMG12C (sold separately)
  • White LED grille available Kicker KMG12W (sold separately)
  • Pair LED grille with Kicker KMLC LED remote (sold separately)
  • 10.3 mm Xmax
  • Single Stacked Ceramic magnet motor structure
  • Frequency Response: 30 - 500 Hz
  • Resonance Frequency (Fs): 29.9 Hz
  • Sensitivity: 88.1 dB
  • Recommended sealed box volume: 1.25 cubic feet - 3.5 cubic feet
  • Recommended ported box volume: 1.75 cubic feet - 2.25 cubic feet
  • Top-mount depth: 5 1/2"
  • Cutout diameter: 11"
  • Authorized Internet Dealer
  • 3 Year Manufacturer's Warranty

  • Sold Individually


Loading...
DMH-1800NEX main

Pioneer DMH-1800NEX

6.8" Double DIN Touchscreen Digital Multimedia Receiver with Bluetooth, Apple CarPlay, Android Auto, and SiriusXM Ready

3
-19.05%

$339.99

List price $420.00

Limited time!
46CSC654 main

Kicker CSC65 (46CSC654)

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

123
-33.36%

$79.96

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

UTE-73BT main

Alpine UTE-73BT

Single DIN Digital Media Receiver with Bluetooth

44
-16.69%

$149.95

List price $180.00

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

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

CV15BT main

Cerwin-Vega CV15BT

Single Din Digital Media Receiver with Bluetooth

3
Limited time!
DMH-W3050NEX main

Pioneer DMH-W3050NEX

6.8" Double DIN Touchscreen Digital Multimedia Receiver with Bluetooth, Wireless Apple CarPlay and Android Auto, and Built-in Alexa (Sirius XM Ready)

1
-24.20%

$469.99

List price $620.00

XED62 main

Cerwin-Vega XED62

600W Peak (70W RMS) 6.5" XED Series 2-Way Coaxial 4-ohm Speakers

15
-16.67%

$49.99

List price $59.99

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


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

JBLMARSUBSD102GAM small

JBL Stadium Marine 102 (JBLSUBMASD10AM)

• Peak Power: 900 watts
• RMS Power: 300 watts
• Impedance: 2 or 4 ohm
• Multi-color RGB LED lights
• Plus One Polypropylene Cone
• Rubber Surround
• Mount depth: 4-7/8"
• Sensitivity: 89 dB

$149.95

List price $449.95

STADIUMMW1000AM small

JBL Stadium Marine MW1000 (MW1000AM)

• RMS: 300 Watts / Peak: 900 Watts
• Plus One cones provide more overall speaker-cone area than other cones in its class
• Unique and eye-catching RGB illumination
• Features SSI (Switch-Selectable Impedance), which allows you to choose either 2 or 4 ohm load impedance
• Durable One-piece Polymer basket

$124.49

List price $449.95

Specifications & Details


Subwoofer Specifications
CTA-2031 Compliant
Yes
Re-Cone Kit Available
No
Magnet Type
Ceramic
Magnet Structure
Single Stacked
Woofer Surround
Santoprene Rubber
Woofer Composition
Injection Molded Polypropylene
Subwoofer Design
Round / Circle
Xmax (millimeters)
10.3 mm
Sensitivity
88.1 dB
Frequency Response
30 - 500 Hz
Impedance (Per Voice Coil)
4 ohm
Voice Coil(s)
Single
RMS Power Handling
175 watts
Peak Power Handling
350 watts
Subwoofer Size
12"
Series
KM Subwoofer Series
Main Cone Color
Black
Subwoofer Grille
Optional (Accessory required and sold separately)
Recommended Enclosure Specifications
Shallow Mount Installation
No
Cutout Diameter
11"
Top-Mount Depth (Mounting Depth)
5 1/2"
Maximum Ported Box Volume
2.25 cubic feet
Minimum Ported Box Volume
1.75 cubic feet
Maximum Sealed Box Volume
3.5 cubic feet
Minimum Sealed Box Volume
1.25 cubic feet
Recommended Enclosure Type
Ported / Vented
Sealed
Electromechanical Parameters
Mechanical Q Value (Qms)
15.331
Electrical Resistance of Voice Coil (Re)
3.68 ohm
Electrical Q Value (Qes)
0.485
Total Speaker Q Value (Qts)
0.47
Equivalent Compliance (Vas)
66.96 liters
Free-Air Resonance (Fs)
29.9 Hz
What is in the box?
Other Accessory #3
8 - Mounting screws
Other Accessory #2
8 - Mounting screw clips
Other Accessory #1
1 - Back gasket
WITB: Subwoofers
Subwoofer
Paperwork
User manual
Warranty and Return Policy
Parts Warranty Duration
3 years
Labor Warranty Duration
3 years
Warranty Provider
Manufacturer

Item Details


Manufacturer:

Model Number:

KM124

Weight:

5.00lbs

Internal SKU:

45km124

Internal Product ID:

150285

Product and How-to Videos


Customer Ratings & Reviews


Kicker KM124 (45KM124) thumbnail image

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



Durability
0
Value
0
Features
0
Design
0
Usability
0

Customer Reviews

Sort by:

Loading...
Sorry, no reviews found

DDX771 small

Kenwood DDX771 Open Box Complete

Double Din Bluetooth Car Stereo w/ 6.95" LCD Touchscreen and DVD Playback

$359.99

List price $679.99

TE-SSC small

Metra TE-SSC

Install Bay 170 Degree Viewing Angle Small Square Mountable Backup Camera

(4)

$83.99

List price $93.99

GM1585B small

Scosche GM1585B / GM1585 Dash Kit

Install a new Single-DIN car stereo in select 2004-2008 Grand Prix (Black)

(5)

$12.95

List price $16.95

No picture

Pioneer AVH-X5600BHS (Factory Refurbished)

In-Dash 7" Touchscreen Bluetooth Car Stereo Receiver w/ iPod Control, Pandora & MIXTRAX

$329.99

List price $599.99

BT6018 small

Bazooka BT6018

Non-Amplified 6" Ported Subwoofer Bass Tube (8 ohm) with Plastic Woofer Grille

(6)

$109.99

List price $149.99

HED600.4 small

Cerwin-Vega HED600.4

600W HED Series 4-Channel Class AB Car Amplifier

(6)

$94.99

List price $189.99

Related Searches


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

2012 Audi A6

2010 Audi A3

1978 Honda Civic

2014 Acura RDX

2023 Toyota Highlander

2020 Audi TT Quattro

2019 BMW 3 Series

2018 Nissan Armada

1997 GMC C1500 Suburban

2017 Acura RLX

Vehicle
Store
Delete

2003 Harley Davidson FLHT/I Electra Glide Standard

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.