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2004 Audi A4

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Universal gear includes car amplifiers, subs, and other products that do not install in a specific location or require fitment to integrate with a vehicle.

Overview Upgrade your Stereo Upgrade your Speakers Add a Subwoofer Add an Amplifier Digital Sound Processors Audio Installation & Accessories Add a Backup Camera Dads & Grads Sale

Universal-Fit Audio for 2004 Audi A4

When thinking of universal gear, we consider products like a car amp that gives more power to your speakers or subs, cell phone chargers, equalizers and sound processors, rear-seat entertainment and video monitors, as well as dash cameras.

Better sound with your factory radio

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Love your factory look or can't replace the stereo? We got you covered.

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Power and ground wire,
Subwoofers (1,136)
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Power and ground wire (130)
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Line drivers (5)
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Subwoofer (3)
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Alarms with remote start (1)
Backup batteries (1)
Cable management (1)
Connector sets (1)
FM modulators and transmitters (1)
Multi-camera and DVR systems (1)
Overhead monitors (1)
Remote mount media players (1)
Price Range
Wire Gauge
The measurement of the diameter of wire. As the gauge number increases the size of the wire decreases. As the wire gauge number decreases, the diameter of the wire increases. For example, an 8 gauge wire is going to be larger than a 16 gauge wire.

When purchasing wire, make sure that you know what size, or gauge of wire is needed.
Length (ft.)
This the how long the item is. When purchasing an item that requires a specific length (such as RCA interconnect cables or speaker wire), please make sure that the length of the item is long enough for your needs.
Primary Color
This is the main color of the item.
Complies to AWG Standards
Since 1857, The AWG (American Wire Gauge) system has been the standard for measuring the diameter of wire. AWG standard is the measure of bare wire to find true gauge. Companies that do not follow AWG Standards include the thickness of the wire jacket which means the actual wire is not "True to Gauge".
Wire Material
The material that the wire is made of. Copper & aluminum are the most commonly used materials. OFC - Oxygen Free Copper is the ideal choice for wire material. Copper is a superior electrical conductor, & does not expand or contract with heat. CCA - Copper-Clad Aluminum is a suitable choice for lower powered or budget applications. The power transfer is not on par with OFC, but this material offers significant savings.
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DS18 MOFC4GA50P

50 Ft. 4 Gauge Ultra Flex Marine Grade Tinned Power Wire

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DS18 MOFC4GA50P

50 Ft. 4 Gauge Ultra Flex Marine Grade Tinned Power Wire

• 50-feet 4-gauge marine grade tinned power wire
• OFC (100% Oxygen-Free Copper) material
• Wiring for high performance applications
• Ultra-flex wiring for high flex and extra durability

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List price $287.99
-17% $239.95

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• 50-feet 4-gauge marine grade tinned power wire
• OFC (100% Oxygen-Free Copper) material
• Wiring for high performance applications
• Ultra-flex wiring for high flex and extra durability

T-Spec V8GT4BK-100

100 ft 4-Gauge V8GT Series Power Wire (Black)

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T-Spec V8GT4BK-100

100 ft 4-Gauge V8GT Series Power Wire (Black)

• 100 feet 4 gauge Power Wire
• OFC (100% Oxygen-Free Copper) material
• Color: Black
• Superflex translucent jacket

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List price $449.99
-10% $404.99

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• 100 feet 4 gauge Power Wire
• OFC (100% Oxygen-Free Copper) material
• Color: Black
• Superflex translucent jacket

Massive Audio P8200G

200 Ft. 8 Gauge Oxygen Free Copper (OFC) Power Wire (Gray)

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Massive Audio P8200G

200 Ft. 8 Gauge Oxygen Free Copper (OFC) Power Wire (Gray)

• 200 feet 8 gauge power wire
• Oxygen Free Copper (OFC) material
• Flexible silver tinned wires
• Color: Gray / Black

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List price $524.99
-20% $419.99

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• 200 feet 8 gauge power wire
• Oxygen Free Copper (OFC) material
• Flexible silver tinned wires
• Color: Gray / Black

Stinger SPW14TB

100 Ft. 4 Gauge Pro Series 100% Oxygen Free Copper Power Wire (Black)

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Stinger SPW14TB

100 Ft. 4 Gauge Pro Series 100% Oxygen Free Copper Power Wire (Black)

• 100 feet 4 gauge Power Wire
• OFC (100% Oxygen-Free Copper) material
• Color: Black
• Ultra-flexible matte jacket with 1666 strand count

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List price $619.00
-32% $423.00

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• 100 feet 4 gauge Power Wire
• OFC (100% Oxygen-Free Copper) material
• Color: Black
• Ultra-flexible matte jacket with 1666 strand count

T-Spec V10PW-8125

125 ft. (38.10m) 8 Gauge V10 Series Full OFC True Spec Power Wire

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T-Spec V10PW-8125

125 ft. (38.10m) 8 Gauge V10 Series Full OFC True Spec Power Wire

• Meets CEA and ANSI Specification for Wire Gauge
• Full Virgin OFC Copper Construction
• Ultra-flexible PVC Blended Jacket
• Color: Matte Pearl

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List price $194.00
-15% $165.00

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• Meets CEA and ANSI Specification for Wire Gauge
• Full Virgin OFC Copper Construction
• Ultra-flexible PVC Blended Jacket
• Color: Matte Pearl

JL Audio XD-RPW30A-250 (Red)

250 Feet of 30 Amp Oxygen-Free, Fine-Strand Pure Copper Red Power Wire (8 AWG comparable)

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JL Audio XD-RPW30A-250 (Red)

250 Feet of 30 Amp Oxygen-Free, Fine-Strand Pure Copper Red Power Wire (8 AWG comparable)

• 30 Amp capacity
• Pure OFC Copper
• Compact strand orientation and high strand count
• Soft, flexible PVC Jacket

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$449.99

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• 30 Amp capacity
• Pure OFC Copper
• Compact strand orientation and high strand count
• Soft, flexible PVC Jacket

Stinger SSVLP4BK

100 ft 4-Gauge Select Series Speaker Wire (Black)

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Stinger SSVLP4BK

100 ft 4-Gauge Select Series Speaker Wire (Black)

• 4 gauge Speaker Wire
• CCA (Copper-Clad Aluminum) material
• Color: Black
• Soft PVC insulation with heat resistance elements

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List price $229.00
-32% $155.00

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• 4 gauge Speaker Wire
• CCA (Copper-Clad Aluminum) material
• Color: Black
• Soft PVC insulation with heat resistance elements

Limited time!

Stinger SPW316BK

500 ft. 16 Gauge Pro Series OFC Power Wire (Black)

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Stinger SPW316BK

500 ft. 16 Gauge Pro Series OFC Power Wire (Black)

• 500 ft. 16 Gauge Power Wire
• Pure (OFC) Oxygen Free Copper
• Coated in high-quality PVC insulation
• Chemical and Temperature Resistant Jacket
• Color: Black

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List price $209.00
-33% $139.00

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• 500 ft. 16 Gauge Power Wire
• Pure (OFC) Oxygen Free Copper
• Coated in high-quality PVC insulation
• Chemical and Temperature Resistant Jacket
• Color: Black

Stinger SPW316BL

500 ft. 16 Gauge Pro Series OFC Power Wire (Blue)

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Stinger SPW316BL

500 ft. 16 Gauge Pro Series OFC Power Wire (Blue)

• 500 ft. 16 Gauge Power Wire
• Pure (OFC) Oxygen Free Copper
• Coated in high-quality PVC insulation
• Chemical and Temperature Resistant Jacket
• Color: Blue

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List price $229.00
-49% $116.99

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• 500 ft. 16 Gauge Power Wire
• Pure (OFC) Oxygen Free Copper
• Coated in high-quality PVC insulation
• Chemical and Temperature Resistant Jacket
• Color: Blue

Stinger SQVLP8BK

250 ft 8 Gauge Sound Quest Value Series Power Wire (Black)

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Stinger SQVLP8BK

250 ft 8 Gauge Sound Quest Value Series Power Wire (Black)

• 8 gauge Power Wire
• CCA (Copper-Clad Aluminum) material
• Color: Black
• Length: 250 feet

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$124.00

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• 8 gauge Power Wire
• CCA (Copper-Clad Aluminum) material
• Color: Black
• Length: 250 feet

Kicker KMWPR420 (47KMWPR420)

20 Feet of Red Marine Rated 4 Gauge Wire

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Kicker KMWPR420 (47KMWPR420)

20 Feet of Red Marine Rated 4 Gauge Wire

• Marine Rated Power Wire
• 4 AWG

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$89.99

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• Marine Rated Power Wire
• 4 AWG

Kicker KMWPY420 (47KMWPY420)

20 Feet of Yellow Marine Rated 4 Gauge Wire

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Kicker KMWPY420 (47KMWPY420)

20 Feet of Yellow Marine Rated 4 Gauge Wire

• Marine Rated Power Wire
• 4 AWG

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$89.99

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• Marine Rated Power Wire
• 4 AWG

Massive Audio P4100R

100 Ft. 4 Gauge Oxygen Free Copper (OFC) Power Wire (Red)

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Massive Audio P4100R

100 Ft. 4 Gauge Oxygen Free Copper (OFC) Power Wire (Red)

• 100 feet 4 gauge power wire
• Oxygen Free Copper (OFC) material
• Flexible silver tinned wires
• Color: Red

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List price $624.99
-20% $499.99

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• 100 feet 4 gauge power wire
• Oxygen Free Copper (OFC) material
• Flexible silver tinned wires
• Color: Red

Massive Audio P050G

50 Ft. 0 Gauge Oxygen Free Copper (OFC) Power Wire (Gray)

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Massive Audio P050G

50 Ft. 0 Gauge Oxygen Free Copper (OFC) Power Wire (Gray)

• 50 feet 0 gauge power wire
• Oxygen Free Copper (OFC) material
• Flexible silver tinned wires
• Color: Gray / Black

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List price $624.99
-20% $499.99

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• 50 feet 0 gauge power wire
• Oxygen Free Copper (OFC) material
• Flexible silver tinned wires
• Color: Gray / Black

T-Spec V10PW-1050

50 ft. (15.24m) 1/0 Gauge V10 Series Full OFC True Spec Power Wire

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T-Spec V10PW-1050

50 ft. (15.24m) 1/0 Gauge V10 Series Full OFC True Spec Power Wire

• Meets CEA and ANSI Specification for Wire Gauge
• Full Virgin OFC Copper Construction
• Ultra-flexible PVC Blended Jacket
• Color: Matte Pearl

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List price $721.99
-10% $648.99

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• Meets CEA and ANSI Specification for Wire Gauge
• Full Virgin OFC Copper Construction
• Ultra-flexible PVC Blended Jacket
• Color: Matte Pearl

JL Audio XD-BPW4-100

4 AWG 100 ft (30.5 m) Spool of Translucent Blue Power Wire

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JL Audio XD-BPW4-100

4 AWG 100 ft (30.5 m) Spool of Translucent Blue Power Wire

• True 4 AWG specification wire
• 1,862 strands of pure OFC Copper
• Tinned for corrosion resistance (marine-ready)
• Soft, flexible PVC Jacket

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$579.99

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• True 4 AWG specification wire
• 1,862 strands of pure OFC Copper
• Tinned for corrosion resistance (marine-ready)
• Soft, flexible PVC Jacket

JL Audio XD-RPW4-100

4 AWG 100 ft (30.5 m) Spool of Translucent Red Power Wire

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JL Audio XD-RPW4-100

4 AWG 100 ft (30.5 m) Spool of Translucent Red Power Wire

• True 4 AWG specification wire
• 1,862 strands of pure OFC Copper
• Tinned for corrosion resistance (marine-ready)
• Soft, flexible PVC Jacket

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$579.99

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Like New from: $492.99

• True 4 AWG specification wire
• 1,862 strands of pure OFC Copper
• Tinned for corrosion resistance (marine-ready)
• Soft, flexible PVC Jacket

JL Audio XD-BPW8-250

8 AWG 250 ft (76.2 m) Spool of Translucent Blue Power Wire

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JL Audio XD-BPW8-250

8 AWG 250 ft (76.2 m) Spool of Translucent Blue Power Wire

• True 8 AWG specification wire
• 735 strands of pure OFC Copper
• Tinned for corrosion resistance (marine-ready)
• Soft, flexible PVC Jacket

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$579.99

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• True 8 AWG specification wire
• 735 strands of pure OFC Copper
• Tinned for corrosion resistance (marine-ready)
• Soft, flexible PVC Jacket

JL Audio XD-RPW8-250

8 AWG 250 ft (76.2 m) Spool of Translucent Red Power Wire

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JL Audio XD-RPW8-250

8 AWG 250 ft (76.2 m) Spool of Translucent Red Power Wire

• True 8 AWG specification wire
• 735 strands of pure OFC Copper
• Tinned for corrosion resistance (marine-ready)
• Soft, flexible PVC Jacket

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$579.99

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• True 8 AWG specification wire
• 735 strands of pure OFC Copper
• Tinned for corrosion resistance (marine-ready)
• Soft, flexible PVC Jacket

Stinger SPW10TB

50 Ft. 1/0 Gauge Pro Series 100% Oxygen Free Copper Power Wire (Black)

SPW10TB big
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Stinger SPW10TB

50 Ft. 1/0 Gauge Pro Series 100% Oxygen Free Copper Power Wire (Black)

• 50 feet 1/0 gauge Power Wire
• OFC (100% Oxygen-Free Copper) material
• Color: Black
• Ultra flexible matte jacket and 4212 strand count

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List price $819.00
-32% $557.00

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• 50 feet 1/0 gauge Power Wire
• OFC (100% Oxygen-Free Copper) material
• Color: Black
• Ultra flexible matte jacket and 4212 strand count

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    FAQ for Universal-Fit Audio & Electronics in 2004 A4

    Q: Can I upgrade or change the Universal-Fit Audio & Electronics in 2004 Audi A4?

    A: Yes this page includes all the best Universal-Fit Audio & Electronics that work in your A4.

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

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