See all parts that fit your 2002 Thunderbird
975W Max, 4-Channel Amplifier
4-Channel Amplifier • 75 watts RMS x 4 @ 4 ohm • 100 watts RMS x 4 @ 2 ohm • 200 watts RMS x 2 @ 4 ohm (bridged) • Full Electric Crossover • 6-way Smart System Protection • Gain Control • Frequency Response: 15 Hz - 45 kHz
Learn more about the c4004
Install a new Double-DIN car stereo in select 2000-2006 LS and Thunderbird (Black)
$15.99
List price $26.99
Install a new Single-DIN car stereo in select 2000-2006 LS and Thunderbird
$13.99
List price $29.99
Install a new Double-DIN car stereo in select 2000-2006 LS and Thunderbird (Silver)
$15.99
List price $26.99
6.8” Double DIN Digital Multimedia Touchscreen Bluetooth Receiver with Wireless Apple CarPlay and Android Auto (SiriusXM Ready)
$499.00
List price $800.00
Double DIN CD Receiver with Bluetooth and Built-in Alexa (Sirius XM Ready)
$179.00
List price $230.00
7" Double DIN Touchscreen Digital Multimedia Receiver with Bluetooth, Wireless Apple CarPlay, and Wireless Android Auto (SiriusXM and iDataLink Maestro Ready)
$779.95
List price $940.00
720W Peak (120W RMS) 6x8" HED Series 3-Way Coaxial 4-ohm Speakers
$79.99
List price $95.99
360W Peak (120W RMS) 6x8" Club Series 2 Way Coaxial 3-ohm Speakers
$109.95
List price $139.95
Infinity Primus 503CF (PR503CF)
300W Peak (100W RMS) 5.25” Primus Series 2 Way 3-ohm Component Speaker System
$119.95
List price $149.95
4-Channel Amplifier • 75 watts RMS x 4 @ 4 ohm • 100 watts RMS x 4 @ 2 ohm • 200 watts RMS x 2 @ 4 ohm (bridged) • Full Electric Crossover • 6-way Smart System Protection • Gain Control • Frequency Response: 15 Hz - 45 kHz
2 Infinity REF507CF (INFSPKRF507CFUS) w/ Adapter Plates
390W Peak (130W RMS) 5.25" Reference Series 2-way 3-ohm Component Speaker System with Speaker Adapter Plates
$477.88
List price $543.88
6.8" Double DIN Touchscreen Digital Multimedia Receiver with Bluetooth, Apple CarPlay, Android Auto, and SiriusXM Ready
$339.99
List price $420.00
600W Peak (200W RMS) 6.5” CS Series 2 Way Coaxial 4-ohm Speakers
$79.96
List price $119.99
360W Peak (120W RMS) 6.5" Club Series 2-way Coaxial 3-ohm Speakers
$99.95
List price $139.95
600W Peak (200W RMS) 6.5" DB+ Series 2 Way Coaxial 4-ohm Car, Marine and Powersports Speakers
$109.00
List price $119.99
480W Peak (120W RMS) 6.5” DS Series 2-way 4-ohm Coaxial Car Speakers (DSC6504)
$84.99
List price $94.99
6.8" Double DIN Touchscreen Digital Multimedia Receiver with Bluetooth, Wireless Apple CarPlay and Android Auto, and Built-in Alexa (Sirius XM Ready)
$469.99
List price $620.00
600W Peak (70W RMS) 6.5" XED Series 2-Way Coaxial 4-ohm Speakers
$49.99
List price $59.99
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Manufacturer:
Model Number:
C400.4
Weight:
14.00lbs
Internal SKU:
c4004
Internal Product ID:
8479
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Polk Audio C400.4
I have this amplifier biamping a set of MMC6500 component speakers using the PreEQ button. The sound is phenomenal and tuning was a breeze with the PreEQ.
Polk's components are top notch and excellent performers. They look great too! Their high price is easily justified. You won't find this amp new cheaper anywhere else. Trust me, I searched.
6 found this helpful
Universal Remote Bass Level Control Knob
Flush Mount & Universal via RCA. Works with any amp, controls your bass output
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The XLOC44X helps you easily integrate with your factory or aftermarket system
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NVX XIX45 X-Series RCA Interconnect Cable
16.4 ft. of 4-Channel X-Series RCA Cable with Dual Twisted Pair Hyper-Flex Technology
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NVX V-Series RCA Interconnect Cable
19 ft. of 4-Channel RCA cable with dual twisted-pair conductors
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NVX XIV45 4-Channel RCA Audio Interconnect Cable
5 Meters (16.4 ft.) 4-Channel RCA Audio Interconnect Cable with Dual Twisted Pair Hyper-Flex Technology
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$16.99
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All-in-one cable for speaker and amp installation (20 feet)
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75 ft. of True 16 Gauge 100% Copper EnvyFlex Speaker Cable/Wire
(22)
$34.99
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80 Amp Smart Relay Isolator (XSBI80)
Smart isolator - Monitors and auto-charging feature!
(2)
$24.99
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Great for isolating a second batter making it dedicated to the stereo system
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200 Amp Smart Relay Isolator (XSBI200)
Smart isolator - Monitors and auto-charging feature!
(6)
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200 Amp Relay Isolator (BIR200)
Great for isolating a second batter making it dedicated to the stereo system
(17)
$49.99
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500 Amp Relay Isolator (BIR500)
Does not create a voltage drop to the second battery like conventional isolators
(36)
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True 1.0 Farad 20V Capacitor with Digital Read-out, Built-in Distribution Block
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1.0 Farad Capacitor with Digital Red Display for up to 1000W Max
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Belva Nine Function Digital Multimeter
Perfect for any installation and troubleshooting
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This is a must have! Set your crossover frequency like a Pro
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High Quality Element Resistant AGU Fuse Holder
Belva BAGUH2 AGU Fuse Holder
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Modular Linkable ANL Fuse Block
Modular Linkable ANL Fuse Block
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4 Pack of 80 Amp Nickel-Plated MANL Fuse
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4 Pack of 100 Amp Nickel-Plated MANL Fuse
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(18)
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4 Pack of 150 Amp Nickel-Plated MANL Fuse
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2 Pack of 100 Amp Nickel-Plated ANL Fuse
ANL 100A Nickel plated for better power transfer
(8)
$3.99
List price $7.99
2 Pack of 200 Amp Nickel-Plated ANL Fuse
Two fuses per order. High quality 200 Amp ANL Fuses
(23)
$3.99
List price $7.99
2 Pack of 300 Amp Nickel-Plated ANL Fuse
Two fuses per order. High quality 300 Amp ANL Fuses
(19)
$3.99
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0.25 Meter (0.86 ft) Hyper-Flex RCA cable w/ Serpentine-Cut Nickel Plated Connectors
(21)
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Kicker 11DS68.2 (Older, Generation 1 Version)
6" x 8" DS-Series 2-way Component Speakers System (also mounts in most 5" x 7" holes)
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Lower Dash Mesh Grille Cut-Ins for Most 6" to 6.75" Speakers in Select 2024-2025 Vehicles from Jeep
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6000W Peak (4000W RMS) 15" HOOLIGAN Series Dual 2-ohm High Excursion Car Subwoofer
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Monster Cable Stereo Audio Cable (MC 300I-1M)
3.28 ft. (1 Meter) of 300i High Performance Stereo Audio Cable
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1200W Peak (600W RMS) 8" EXL-X Series Dual 4-ohm Car Subwoofer
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12V 45Ah Absorbed Glass Mat (AGM) Rechargeable Battery
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Modern vehicles often require specific brackets, wiring harnesses, and mounting solutions. A fit guide ensures:
Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.
