Garage
Shop

See all parts that fit your 1971 Thunderbird

Kicker KXM400.4 (40KXM4004)

400W KXM Series 4-Channel Class D-IC Stereo Bridgeable Marine Power Amplifier

Kicker
Shop all Kicker
highlight-star-icon

• 50W x 4-Chan. @ 4 ohm
• 100W x 4-Chan. @ 2 ohm
• Bridged: 200W x 2 Chan. @ 4 ohm
• 3-Way System Protection
• Single Channel Operation
• 4 Gauge Power and Ground Inputs
• Stylish Magnetic Panel Covers Tuning Options for Clean Install

Learn more about the 40kxm4004

We apologize

This item has been discontinued

NVX - Worth the Envy - Direct to Consumer Car Audio

Loading...
Limited time!
46CSC654 main

Kicker CSC65 (46CSC654)

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

254
-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

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

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

214
-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)

72
-10.53%

$84.99

List price $94.99

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

R169X2 main

Rockford Fosgate Prime R169X2

260W Peak (130W RMS) 6x9" Prime Series 2 Way Coaxial 4-ohm Speakers

49
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

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

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

Description


Kicker brand icon

Authorized dealer




Kicker Audio: Quality, Performance, and Passion
(Sonic at Stillwater Designs HQ)



Kicker Always Exceeds Rated Power

General Features:

  • KXM Series 4-Channel Class D-IC Marine Amplifier
  • RMS Power Rating:
    • 4 ohm: 50 watts x 4 chan.
    • 2 ohm: 100 watts x 4 chan.
    • Bridged, 4 ohm: 200 watts x 2 chan.
  • Max power output: 800 watts x 1 chan.
  • High-efficiency regulated MOSFET power supply
  • LED power (green) and protect (red) indicators
  • Variable Bass Boost (Variable 0-18 dB @ 40 Hz)
  • Soft start turn-on
  • 4/3/2 and mono channel operation
  • Preamp RCA outputs to daisy chain multiple amps
  • All feature FIT (Fail-Safe Integration Technology) to accept output from virtually any source
  • FIT’s lab-grade, balanced differential inputs offer best possible noise rejection
  • Speaker-level input compatible (switchable) through RCA connection, Kicker 09ZISL required and sold separately
  • Double-sided fiberglass circuit board
  • Built-in crossovers and adjustable KickEQ for dialing it in
  • DC offset or 12v remote auto turn-on modes
  • Angled custom-tooled power connectors
  • Stylish magnetic panels cover controls and glass-fiber composite end panels
  • Heavy duty high-mass aluminum alloy heat-sink
  • Input sensitivity:
    • Low level: 125mV-5V
    • High level: 250mV-10V
  • Variable low-pass filter (40-500 Hz, 24 dB/octave)
  • Variable high-pass filter (10-500 Hz with 10x multiplier, 24 dB/octave)
  • Frequency Response: 10-20,000 Hz
  • CEA-2006 compliant amplifier
  • 4 gauge power and ground wiring is recommended for installation. Contact us for information regarding a discount on select amplifier kits from our website when purchased together with this amplifier. Click Here for our contact information.
  • Dimensions: 8-5/16"W x 11-3/16"L x 2-1/8"H
  • Authorized Internet Dealer
  • 2-year Manufacturer's Warranty

This item is currently not eligible for our low price guarantee. This may be due to supply constraints, manufacturer restrictions, or another reason. We're always here to help you get the best price possible so give us a call or email today. Our experts will do their best to build the system that works for you within the rules.


Best selling similar products

VADM4v2 small

NVX VADM4 v2 (VADM4v2)

• 80 watts x 4 channel @ 4 ohm
• 125 watts x 4 channel @ 2 ohm
• Bridged: 250 watts x 2 channel @ 4 ohm
• Total RMS Power: 500 watts
• Class D 2 ohm Stable 4-Channel Amplifier

(111)

$209.99

List price $239.99

VAD10004v2 small

NVX VAD10004 v2 (VAD10004v2)

• 150 watts x 4 channel @ 4 ohm
• 250 watts x 4 channel @ 2 ohm
• Bridged: 500 watts x 2 channel @ 4 ohm
• Total RMS Power: 1000 watts
• Class D 2 ohm Stable 4-Channel Amplifier

(117)

$279.99

List price $335.99

VAD11005v2 small

NVX VAD11005 v2 (VAD11005v2)

• 80 watts x 4 channel + 350 watts x 1 channel @ 4 ohm
• 125 watts x 4 channel + 600 watts x 1 channel @ 2 ohm
• Bridged: 250 watts x 2 channel @ 4 ohm + 600 watts x 1 channel @ 2 ohm
• Total RMS Power: 1100 watts
• Class D 2 ohm Stable 5-Channel Amplifier

(137)

$349.99

List price $419.99

Specifications & Details


Power Specifications - Full Range Channels
RMS Power @ 4 ohms
50 watts x 4 channel
RMS Power @ 2 ohms
100 watts x 4 channel
Bridged RMS Power
200 watts x 2 channel
Amplifier Specifications
Number of Channels
4-Channel
Total Peak Power Output
800 watts
Total RMS Power Output
400 watts
Maximum Input Gauge Size
4 AWG
Minimum Impedance Unbridged
2 ohm
Minimum Impedance Bridged
4 ohms
Speaker Level Inputs
No
Preamp Outputs
1 pair
Built-in Crossover
Low-Pass (LP)
High-Pass (HP)
High-Pass Crossover Frequency
10 - 50000 Hz
Low-Pass Crossover Frequency
40 - 50000 Hz
Signal-to-Noise Ratio
95 dB
Bass Boost
0 - 18 dB
Remote bass/level controller
No
Warranty and Return Policy
Parts Warranty Duration
2 years
Labor Warranty Duration
2 years
Warranty Provider
Manufacturer

Item Details


Manufacturer:

Model Number:

40KXM400.4

Weight:

6.00lbs

Internal SKU:

40kxm4004

Internal Product ID:

72006

Customer Ratings & Reviews


Kicker KXM400.4 (40KXM4004) 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


ZC1-216 small

MB Quart ZC1-216

240W Peak (120W RMS) 6-1/2" Z-Line Series 2-Way Component Car Speakers

(12)

$108.99

List price $299.99

XIAH-RCA small

Metra XIAH-RCA

Universal Auxiliary Input Cable for XIA-D01/XIA-I01/XIA-EU1

(5)

$9.99

List price $19.99

SXXv2-15D2 small

RE Audio SXXv2-15D2

1200W 15" SXXv2 Series Dual 2 Ohm Subwoofer (SXX v2 15D2 , SXX15V2D2)

(27)

$267.99

List price $689.99

ACC-RCA1 small

iDataLink Maestro ACC-RCA1 Amplifier Interface

RCA Adapter Harness and Data Extension Cable

$34.99

List price $43.99

CD6.2LE small

Clif Designs CD6.2LE

1600W Max, LE Series 2-Channel Amplifier

$119.99

List price $339.99

Related Searches


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

2011 Lexus LS600hL

2003 Chrysler 300M

2015 Subaru Impreza

1987 Buick Skylark

2003 MINI Cooper

2002 Dodge Ram 2500 Van

1971 Ford Thunderbird

2008 Volvo C70

2023 BMW M8

1995 Subaru Impreza

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.