See all parts that fit your 2003 Focus
4-Channel Amplifier
600 Watt 4 Channel Amplifier • 150W RMS x 2 Chan. @ 2 Ohm • HPF(15Hz-1.5kHz)/LPF(50Hz-5kHz) • RCA Outputs • 4 Gauge Power Connectors • 10 Gauge Speaker Connectors
Learn more about the d56004
Install New Speakers in select 1993-2017 vehicles from Ford, Mazda, Mercury
$9.99
List price $14.99
Connect your factory antenna to a new aftermarket radio for select 1973-2025 vehicles from Audi, Mercedes-Benz, Volkswagen
$7.99
List price $11.99
Install a new car stereo in select 1986-2004 vehicles from Ford, Mercury, Mazda
$5.99
List price $6.99
Install a new Double-DIN car stereo in select 1999-2004 Focus and Cougar
$22.99
List price $25.99
Install a new Single-DIN car stereo in select 1999-2004 Focus and Cougar
$26.99
List price $29.99
7" Double DIN Touchscreen Digital Multimedia Receiver with Bluetooth, Apple CarPlay and Android Auto (SiriusXM Ready)
$329.95
List price $349.95
Single DIN Digital Media Receiver with Bluetooth (SiriusXM Ready)
$149.95
List price $180.00
Single DIN CD Receiver with Bluetooth, HD Radio and SiriusXM Ready
$249.99
List price $280.00
600 Watt 4 Channel Amplifier • 150W RMS x 2 Chan. @ 2 Ohm • HPF(15Hz-1.5kHz)/LPF(50Hz-5kHz) • RCA Outputs • 4 Gauge Power Connectors • 10 Gauge Speaker Connectors
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
6.75" Double DIN Touchscreen Digital Multimedia Receiver with Bluetooth, Apple CarPlay, Android Auto with Backup Camera
$329.99
600W Peak (200W RMS) 6.5” CS Series 2 Way Coaxial 4-ohm Speakers
$79.96
List price $119.99
6.8" Double DIN Touchscreen Digital Multimedia Receiver with Bluetooth, Apple CarPlay, Android Auto, and SiriusXM Ready
$349.99
List price $420.00
7" Double DIN Touchscreen Digital Multimedia Receiver with Bluetooth, Apple CarPlay and Android Auto (SiriusXM Ready)
$329.95
List price $349.95
6.8" Double DIN Digital Multimedia Receiver with Bluetooth, Wireless Apple CarPlay, and Android Auto (SiriusXM Ready)
$599.99
List price $750.00
480W Peak (120W RMS) 6.5” DS Series 2-way 4-ohm Coaxial Car Speakers (DSC6504)
$84.99
List price $94.99
600W Peak (200W RMS) 6.5" DB+ Series 2 Way Coaxial 4-ohm Car, Marine and Powersports Speakers
$109.00
List price $119.99
360W Peak (120W RMS) 6.5" Club Series 2-way Coaxial 3-ohm Speakers
$99.95
List price $139.95
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Manufacturer:
Model Number:
D5-600.4
Weight:
25.00lbs
Internal SKU:
d56004
Internal Product ID:
2988
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Awesome
This is one of the cleanest amps I have heard. Diamond audio is an excellent quality brand that not everyone has. This amp is pushing a strong 75x4 watts. I've got Diamond audio fronts and eclipse rears. Both of them are 75W RMS and they sound so much better off this amp than a deck (well anything sounds better compared to the deck)
1 found this helpful
The XLOC44X helps you easily integrate with your factory or aftermarket system
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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
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75 ft. of True 12 Gauge 100% Copper EnvyFlex Speaker Cable/Wire
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$59.99
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All-in-one cable for speaker and amp installation (20 feet)
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80 Amp Smart Relay Isolator (XSBI80)
Smart isolator - Monitors and auto-charging feature!
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200 Amp Smart Relay Isolator (XSBI200)
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500 Amp Smart Relay Isolator (XSBI500)
Smart isolator - Monitors and auto-charging feature!
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500 Amp Relay Isolator (BIR500)
Does not create a voltage drop to the second battery like conventional isolators
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$79.99
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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
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High Quality Element Resistant AGU Fuse Holder
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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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2 Pack of 100 Amp Nickel-Plated ANL Fuse
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2 Pack of 200 Amp Nickel-Plated ANL Fuse
Two fuses per order. High quality 200 Amp ANL Fuses
(22)
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2 Pack of 300 Amp Nickel-Plated ANL Fuse
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(19)
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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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SMD VU-DIN LED Sound System Output Display by Steve Meade Designs
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6 Ft 2-Channel 6000 Series Audiophile Grade RCA Interconnect Cable
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Stinger SHD20 HPM Series Power or Ground Distribution Block with Satin Chrome Finish
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2003-2005 Mazda 6 Double and ISO DIN Radio Install Kit
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Bass Control Module for Remote Ready EL and BA Series Amplifiers
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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.
