Garage
Shop

1981 Audi 4000 S

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.

Universal-Fit Audio for 1981 Audi 4000 S

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.

Loading...
Filters
filter-icon Filters & Sort
Limited time!

Rockford Fosgate RFITY-1F

Premium Y-Adapter 1 Female to 2 Male OFC Wire w/ 6 Cut Connectors

RFITY-1F big
Go to item page Right Arrow Icon of Right Arrow

Premium Y-Adapter 1 Female to 2 Male OFC Wire w/ 6 Cut Connectors

• Y Adapter with 2 Male and 1 Female
• Compatible with Rockford Fosgate Interconnects
• Dual Twist Design
• 6-Cut Connectors
• Woven Outer Shield

Flash Sale! Save at Checkout!
shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

5
$19.99

In stock

• Y Adapter with 2 Male and 1 Female
• Compatible with Rockford Fosgate Interconnects
• Dual Twist Design
• 6-Cut Connectors
• Woven Outer Shield

JL Audio XD-CLRAIC4-12

12 ft. (3.66) 4-channel Twisted-Pair Audio Interconnect Cable w/ Molded Connectors

XD-CLRAIC4-12 big
Go to item page Right Arrow Icon of Right Arrow

12 ft. (3.66) 4-channel Twisted-Pair Audio Interconnect Cable w/ Molded Connectors

• 4-channel Twisted-Pair Audio Interconnect Cable
• Pure Oxygen Free Copper Conductors With Polyethylene Dielectrics
• Molded Connector Bodies For Extended Durability
• Length: 18 Ft (5.49 M)

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

2
$49.99

Available

Ships in 10-14 days

• 4-channel Twisted-Pair Audio Interconnect Cable
• Pure Oxygen Free Copper Conductors With Polyethylene Dielectrics
• Molded Connector Bodies For Extended Durability
• Length: 18 Ft (5.49 M)

NVX - Worth the Envy - Direct to Consumer Car Audio

Stinger SI6417

4-channel Shielded Directional Interconnect 17ft/5.2m

SI6417 big
Go to item page Right Arrow Icon of Right Arrow

4-channel Shielded Directional Interconnect 17ft/5.2m

• 17 Ft 6000 Series 4-Channel Stereo RCA Interconnect Cable
• Continuous Connection Construction (C3 Tech)
• Machined Metal RCA Ends
• Oversized OFC Conductors
• Twisted Pair Construction
• Color: Blue

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

List price $139.00
-55% $62.99

In stock

• 17 Ft 6000 Series 4-Channel Stereo RCA Interconnect Cable
• Continuous Connection Construction (C3 Tech)
• Machined Metal RCA Ends
• Oversized OFC Conductors
• Twisted Pair Construction
• Color: Blue

Stinger SI426

6 ft. of 2-Channel 4000 Series RCA Interconnect Cable

SI426 big
Go to item page Right Arrow Icon of Right Arrow

6 ft. of 2-Channel 4000 Series RCA Interconnect Cable

• 2-Channel 4000 Series RCA Interconnect Cable
• 6 ft. Cable Length
• Stinger Audiophile Grade
• Twisted Pair Construction
• Clear Protective Jacket
• Compact Connector Design
• Split-Tip Connector

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

11
List price $29.00
-48% $14.99

In stock

• 2-Channel 4000 Series RCA Interconnect Cable
• 6 ft. Cable Length
• Stinger Audiophile Grade
• Twisted Pair Construction
• Clear Protective Jacket
• Compact Connector Design
• Split-Tip Connector

JL Audio XD-CLRAIC2-9

9 ft. (2.7 m) 2-channel Twisted-Pair Audio Interconnect Cable w/ Molded Connectors

XD-CLRAIC2-9 big
Go to item page Right Arrow Icon of Right Arrow

9 ft. (2.7 m) 2-channel Twisted-Pair Audio Interconnect Cable w/ Molded Connectors

•2-channel Twisted-Pair Audio Interconnect Cable
• Length: 9 Ft (2.7 M)
• Pure Oxygen Free Copper Conductors With Polyethylene Dielectrics
• Molded Connector Bodies For Extended Durability

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

2
$29.99

In stock

•2-channel Twisted-Pair Audio Interconnect Cable
• Length: 9 Ft (2.7 M)
• Pure Oxygen Free Copper Conductors With Polyethylene Dielectrics
• Molded Connector Bodies For Extended Durability

Stinger 2-Channel RCAs (SI123)

3 Ft 1000 Series 2-Channel Audiophile Grade RCA Stereo Interconnect Cable

SI123 big
Go to item page Right Arrow Icon of Right Arrow

3 Ft 1000 Series 2-Channel Audiophile Grade RCA Stereo Interconnect Cable

1000 Series 2-Channel RCA Stereo Interconnect Cable • Audiophile Grade Performance • Compact Molded Ends • Heavy Gauge Conductors • Molded Strain Reliefs • ShocKrome Ends • Cable Length: 3 Feet

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

10
List price $9.00
-33% $5.99

In stock

1000 Series 2-Channel RCA Stereo Interconnect Cable • Audiophile Grade Performance • Compact Molded Ends • Heavy Gauge Conductors • Molded Strain Reliefs • ShocKrome Ends • Cable Length: 3 Feet

JL Audio XD-CLRAIC2-25

25 ft. (7.62 m) 2-channel Twisted-Pair Audio Interconnect Cable w/ Molded Connectors

XD-CLRAIC2-25 big
Go to item page Right Arrow Icon of Right Arrow

25 ft. (7.62 m) 2-channel Twisted-Pair Audio Interconnect Cable w/ Molded Connectors

• 2-channel Twisted-Pair Audio Interconnect Cable
• Length: 25 Ft (7.6 M)
• Pure Oxygen Free Copper Conductors With Polyethylene Dielectrics
• Molded Connector Bodies For Extended Durability

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

$44.99

Available

Ships in 10-14 days

• 2-channel Twisted-Pair Audio Interconnect Cable
• Length: 25 Ft (7.6 M)
• Pure Oxygen Free Copper Conductors With Polyethylene Dielectrics
• Molded Connector Bodies For Extended Durability

Stinger SSIB6

Stinger Select RCA Coaxial Interconnect Cable - 6 Ft

SSIB6 big
Go to item page Right Arrow Icon of Right Arrow

Stinger Select RCA Coaxial Interconnect Cable - 6 Ft

• 2 Male to 2 Male
• RCA Interconnect Chord
• Color: Blue

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

2
List price $9.00
-56% $3.99

In stock

• 2 Male to 2 Male
• RCA Interconnect Chord
• Color: Blue

Limited time!

NVX XIX2F

1 Male to 2 Female Y-Adapter X-Series RCA Audio Interconnect Cables (2-pack)

XIX2F big
Go to item page Right Arrow Icon of Right Arrow

1 Male to 2 Female Y-Adapter X-Series RCA Audio Interconnect Cables (2-pack)

• Shielded noise-rejecting double Twisted-pair construction
• Heavy gauge OFC conductors ensure superior sound quality
• Split-tip Silver-Plated ends offer best in class signal transfer
• Precision Machined “Locking” ends with colored channel identifiers
• Black nylon protective jacket minimizes friction and electromagnetic interference

Purchase $400 or More of NVX and Save 15%!
shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

10
List price $24.99
-40% $14.99

In stock

Used from: $12.99

• Shielded noise-rejecting double Twisted-pair construction
• Heavy gauge OFC conductors ensure superior sound quality
• Split-tip Silver-Plated ends offer best in class signal transfer
• Precision Machined “Locking” ends with colored channel identifiers
• Black nylon protective jacket minimizes friction and electromagnetic interference

JL Audio XD-CLRAICY-1F2M Y-Adatper

Twisted-Pair Audio Y-Adapter Cable w/ Molded Connectors - 1 female jack / 2 male plugs

XD-CLRAICY1F2M big
Go to item page Right Arrow Icon of Right Arrow

Twisted-Pair Audio Y-Adapter Cable w/ Molded Connectors - 1 female jack / 2 male plugs

• Twisted-Pair Audio Y-Adapter Cable
• Pure OFC Copper Conductors With Polyethylene Dielectrics
• Molded Connector Bodies
• 1 Female plug / 2 male jacks

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

2
$14.99

In stock

• Twisted-Pair Audio Y-Adapter Cable
• Pure OFC Copper Conductors With Polyethylene Dielectrics
• Molded Connector Bodies
• 1 Female plug / 2 male jacks

Stinger SI4217

17 ft. of 2-Channel 4000 Series RCA Interconnect Cable

SI4217 big
Go to item page Right Arrow Icon of Right Arrow

17 ft. of 2-Channel 4000 Series RCA Interconnect Cable

2-Channel 4000 Series RCA Interconnect Cable • 17 ft. Cable Length • Stinger Audiophile Grade • Twisted Pair Construction • Clear Protective Jacket • Compact Connector Design • Split-Tip Connector

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

5
List price $49.00
-59% $19.99

In stock

2-Channel 4000 Series RCA Interconnect Cable • 17 ft. Cable Length • Stinger Audiophile Grade • Twisted Pair Construction • Clear Protective Jacket • Compact Connector Design • Split-Tip Connector

JL Audio XD-CLRAICY-1M2F

Twisted-Pair Audio Y-Adapter Cable w/ Molded Connectors - 1 male plug / 2 female jacks

XD-CLRAICY1M2F big
Go to item page Right Arrow Icon of Right Arrow

Twisted-Pair Audio Y-Adapter Cable w/ Molded Connectors - 1 male plug / 2 female jacks

Twisted-Pair Audio Y-Adapter Cable • Pure OFC Copper Conductors With Polyethylene Dielectrics • Molded Connector Bodies • 1 male plug / 2 female jacks

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

1
$14.99

In stock

Only 3 Left!

Twisted-Pair Audio Y-Adapter Cable • Pure OFC Copper Conductors With Polyethylene Dielectrics • Molded Connector Bodies • 1 male plug / 2 female jacks

Stinger SI6212

12 Ft 2-Channel 6000 Series Audiophile Grade RCA Interconnect Cable

SI6212 big
Go to item page Right Arrow Icon of Right Arrow

12 Ft 2-Channel 6000 Series Audiophile Grade RCA Interconnect Cable

• 2-Channel 6000 Series RCA Interconnect Cable
• 12 ft. Cable Length
• Stinger Audiophile Grade
• Twisted Pair Construction
• Blue Protective Jacket
• Mylar Shielding
• Split-Tip Connector
• Molded Strain Reliefs

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

5
List price $59.00
-54% $26.99

In stock

• 2-Channel 6000 Series RCA Interconnect Cable
• 12 ft. Cable Length
• Stinger Audiophile Grade
• Twisted Pair Construction
• Blue Protective Jacket
• Mylar Shielding
• Split-Tip Connector
• Molded Strain Reliefs

JL Audio XD-AICS-1F4F

4-Way RCA Audio Interconnect Splitter

XD-AICS-1F4F big
Go to item page Right Arrow Icon of Right Arrow

4-Way RCA Audio Interconnect Splitter

• 4-Way RCA Audio Interconnect Splitter
• Designed to split audio output connections to multiple devices

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

$24.99

In stock

• 4-Way RCA Audio Interconnect Splitter
• Designed to split audio output connections to multiple devices

Stinger SI42YM

2-Channel 4000 Series RCA Y-Adapter Cable (2 Male to 1 Female)

SI42YM big
Go to item page Right Arrow Icon of Right Arrow

2-Channel 4000 Series RCA Y-Adapter Cable (2 Male to 1 Female)

• 2-Channel 4000 Series RCA Y-Adapter Cable
• 2 Male to 1 Female
• Stinger Audiophile Grade
• Twisted Pair Construction
• Clear Protective Jacket
• Compact Connector Design
• Split-Tip Connector

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

2
List price $19.00
-32% $12.99

In stock

• 2-Channel 4000 Series RCA Y-Adapter Cable
• 2 Male to 1 Female
• Stinger Audiophile Grade
• Twisted Pair Construction
• Clear Protective Jacket
• Compact Connector Design
• Split-Tip Connector

Stinger 8000 Series Audiophile RCAs (SI8220)

20 Ft 2-Channel 8000 Series High Rate-Double Twisted Pair Directional Audiophile Grade RCA Stereo Interconnect Cable

SI8220 big
Go to item page Right Arrow Icon of Right Arrow

20 Ft 2-Channel 8000 Series High Rate-Double Twisted Pair Directional Audiophile Grade RCA Stereo Interconnect Cable

2-Channel 8000 Series RCA Interconnect Cable • 20 ft. Cable Length • Stinger Audiophile Grade • Double Twisted Pair Construction • Black Protective Jacket • Triple Braided Shielding • Locking Split-Tip Connectors • Molded Strain Reliefs

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

7
List price $159.00
-53% $74.99

In stock

Only 3 Left!

2-Channel 8000 Series RCA Interconnect Cable • 20 ft. Cable Length • Stinger Audiophile Grade • Double Twisted Pair Construction • Black Protective Jacket • Triple Braided Shielding • Locking Split-Tip Connectors • Molded Strain Reliefs

Stinger SI6412

12 Ft 6000 Series 4 Ch Shielded Directional Twisted RCA

SI6412 big
Go to item page Right Arrow Icon of Right Arrow

12 Ft 6000 Series 4 Ch Shielded Directional Twisted RCA

• Oversized OFC conductors provide excellent sound quality
• Continuous connection construction (C3 Tech) provides unmatched signal transfer
• Mylar shielding for increased noise rejection
• Split-tip machined metal connector allows better signal transfer
• Twisted pair winding patterns improve clarity and broaden dynamic range
•Compact connector design for easy installation

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

1
List price $109.00
-50% $54.99

In stock

• Oversized OFC conductors provide excellent sound quality
• Continuous connection construction (C3 Tech) provides unmatched signal transfer
• Mylar shielding for increased noise rejection
• Split-tip machined metal connector allows better signal transfer
• Twisted pair winding patterns improve clarity and broaden dynamic range
•Compact connector design for easy installation

JL Audio XD-CLRAIC2-12 2-Channel RCA Cable

12 ft. (3.7 m) Two-Channel Twisted-Pair Audio RCA Interconnect Cable w/ Molded Connectors

XD-CLRAIC2-12 big
Go to item page Right Arrow Icon of Right Arrow

12 ft. (3.7 m) Two-Channel Twisted-Pair Audio RCA Interconnect Cable w/ Molded Connectors

• 2-channel Twisted-Pair Audio Interconnect Cable
• Length: 12 Ft (3.7 M)
• Pure Oxygen Free Copper Conductors With Polyethylene Dielectrics
• Molded Connector Bodies For Extended Durability

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

$34.99

Available

Ships in 10-14 days

• 2-channel Twisted-Pair Audio Interconnect Cable
• Length: 12 Ft (3.7 M)
• Pure Oxygen Free Copper Conductors With Polyethylene Dielectrics
• Molded Connector Bodies For Extended Durability

JL Audio XD-CLRAICB-2F RCA Barrel Connector

Molded Audio Barrel Connectors - 2 female RCA Jack Ends

XD-CLRAICB-2F big
Go to item page Right Arrow Icon of Right Arrow

Molded Audio Barrel Connectors - 2 female RCA Jack Ends

• Molded Audio Barrel Connectors - 2 Female RCA Jack Ends
• Satin Black Jacket
• Machined Brass Connector Elements

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

4
$8.99

In stock

Only 2 Left!

• Molded Audio Barrel Connectors - 2 Female RCA Jack Ends
• Satin Black Jacket
• Machined Brass Connector Elements

Rockford Fosgate RFIS RCA Male Adaptor

RCA Signal Cable Female Coupler - "Barrel Connectors"

RFIS big
Go to item page Right Arrow Icon of Right Arrow

RCA Signal Cable Female Coupler - "Barrel Connectors"

• Allows two RCA cables with male ends to connect to each other
• Female to Female RCA adaptors
• Platinum plated RCA connections
• Corrosion resistance ends
• High quality PVC molded ends

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

3
$9.99

Available

Ships in 10-14 days

• Allows two RCA cables with male ends to connect to each other
• Female to Female RCA adaptors
• Platinum plated RCA connections
• Corrosion resistance ends
• High quality PVC molded ends

NVX - Worth the Envy - Direct to Consumer Car Audio

Items per page: 20 40 60

    Clear all
    why-shoping-with-sonic

    We love people and we're ready to help you! See what separates us from our competition.

    Take advantage of our VIP rewards like 10% back on your purchases, free 2-day shipping, extended warranties, and free returns! Gain access to all of these rewards without any membership fees.
    Get great discounted (and possibly FREE) installation accessories with most car stereo purchases. This includes dash kits, wiring harnesses and antenna adapters that you will need to properly install your new car stereo.
    We are an Authorized Dealer for all the brands we sell, including the most premium brands in car and marine audio such as Hertz, JL Audio, NVX, Rockford Fosgate, Kicker, Alpine, Kenwood and many more.
    Shop Deals and get up to 30% off premium brands! Shop Now! We are always looking out for the best products and deals to offer our customers. Don’t pay too much by shopping elsewhere!
    We have information on brands, gear, and more for you to explore! Check out our YouTube Channel for helpful how-to videos, product reviews, and Q&As. For a more detailed look, also visit our Learning Center!
    Our trained experts are here to assist you! They are just a phone call or click away to help you get the right gear for you and your vehicle!
    Why Shop With Us?
    FAQ for Universal-Fit Audio & Electronics in 1981 4000 S

    Q: Can I upgrade or change the Universal-Fit Audio & Electronics in 1981 Audi 4000 S?

    A: Yes this page includes all the best Universal-Fit Audio & Electronics that work in your 4000 S.

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

    1981 Audi 4000 S

    1981 Dodge Colt

    2008 Volvo V50

    1983 Volkswagen Jetta

    1986 Mercury Lynx

    Vehicle
    Store
    Delete

    2014 Harley Davidson FXDC Super Glide Custom

    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 category 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.