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1981 Ford Thunderbird

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 Ford Thunderbird

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.

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Limited time!

NVX BIR80

80-Amp High Current Dual Battery Isolator and Relay for Car Audio Systems (Handles up to 150-Amp Surge)

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80-Amp High Current Dual Battery Isolator and Relay for Car Audio Systems (Handles up to 150-Amp Surge)

• 80-Amp continuous / 150-Amp surge
• Ideal for car stereo systems and mobile electronics
• Prevents the main starter battery from draining
• 10V to 16.5V DC operating range

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List price $19.99
-20% $15.99

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• 80-Amp continuous / 150-Amp surge
• Ideal for car stereo systems and mobile electronics
• Prevents the main starter battery from draining
• 10V to 16.5V DC operating range

Limited time!

NVX VSW124 Version 3 (VSW124v3)

1200 Watt (600W RMS) 12" VS-Series v3 Dual 4-ohm Car Subwoofer

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1200 Watt (600W RMS) 12" VS-Series v3 Dual 4-ohm Car Subwoofer

• Peak Power: 1200 watts
• RMS Power: 600 watts
• Impedance: Dual 4 ohm
• Enhanced Pressed Paper Cone
• High Roll Foam Surround
• Mount depth: 6.45"
• Sensitivity: 86 dB

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65
List price $155.99
-17% $129.99

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NVX - Worth the Envy - Direct to Consumer Car Audio

NVX VADM2 v2 (VADM2v2)

600W RMS Class D V-Series Micro Full-Range 2-Channel Car/Marine/Powersports Amplifier

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600W RMS Class D V-Series Micro Full-Range 2-Channel Car/Marine/Powersports Amplifier

• 200 watts x 2 channel @ 4 ohm
• 300 watts x 2 channel @ 2 ohm
• Bridged: 600 watts x 1 channel @ 4 ohm
• Total RMS Power: 600 watts
• Class D 2 ohm Stable 2-Channel Amplifier

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Available Offers (2) for NVX VADM2 v2 (VADM2v2)
Save 30% off an NVX XKIT82 Amp Kit at Checkout! Add a qualifying amplifier to your cart and save 30% on the NVX XKIT82 Amp Kit! No code needed — discount applies automatically at checkout.
Purchase $400 or More of NVX and Save 15%!
2026-07-27 11:08:20
Used from: $165.69 Like New from: $169.99
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NVX NE122S

Dual 12" Sealed 3/4" MDF Black Carpeted Subwoofer Enclosure – 2.0 Cu. Ft. with Polyfil and NVX Logo

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Dual 12" Sealed 3/4" MDF Black Carpeted Subwoofer Enclosure – 2.0 Cu. Ft. with Polyfil and NVX Logo

• 12" Dual Sealed Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Internal box volume: 2.00 cubic feet
• Premium Black Carpet with Black NVX Logo

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List price $155.99
-17% $129.99

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• 12" Dual Sealed Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Internal box volume: 2.00 cubic feet
• Premium Black Carpet with Black NVX Logo

Limited time!

NVX XIX45

16.4 ft (5 meter) 4-Channel X-Series RCA Audio Interconnect Cable

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16.4 ft (5 meter) 4-Channel X-Series RCA Audio Interconnect Cable

• 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

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List price $28.99
-17% $23.99

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• 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

Limited time!

NVX NV12GR v2 (Gen 2) Larger Hole Pattern

Mesh Grille for NVX 12" E, N, VS and SM-Series Subwoofers

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Mesh Grille for NVX 12" E, N, VS and SM-Series Subwoofers

• 12" Protective Subwoofer Grille
• Perfect for Use with NVX E-, N-, Vs-, SM-Series Subwoofers (ESW124, NSW122v3, NSW124v3, VSW122v3, VSW124v3, SMW12D4)
• Works with Most Other 12" Subwoofers
• High Quality Construction

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-20% $15.99

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• 12" Protective Subwoofer Grille
• Perfect for Use with NVX E-, N-, Vs-, SM-Series Subwoofers (ESW124, NSW122v3, NSW124v3, VSW122v3, VSW124v3, SMW12D4)
• Works with Most Other 12" Subwoofers
• High Quality Construction

Limited time!

NVX NE102P

Dual 10" Slot Ported 3/4" MDF Black Carpeted Subwoofer Enclosure – 2.90 Cu. Ft. with Polyfil and NVX Logo

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Dual 10" Slot Ported 3/4" MDF Black Carpeted Subwoofer Enclosure – 2.90 Cu. Ft. with Polyfil and NVX Logo

• 10" Dual Ported Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Internal box volume: 2.90 cubic feet
• Premium Black Carpet with Black NVX Logo

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List price $155.99
-17% $129.99

In stock

• 10" Dual Ported Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Internal box volume: 2.90 cubic feet
• Premium Black Carpet with Black NVX Logo

Limited time!

NVX XW0BK5

5 ft 1/0-Gauge EnvyFlex True Spec Oxygen-Free Copper Power and Ground Wire (Black)

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5 ft 1/0-Gauge EnvyFlex True Spec Oxygen-Free Copper Power and Ground Wire (Black)

• 5 feet 1/0 gauge Power and Ground Wire
• Silver-tinned OFC (100% Oxygen-Free Copper) material
• Color: Black

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List price $59.99
-33% $39.99

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• 5 feet 1/0 gauge Power and Ground Wire
• Silver-tinned OFC (100% Oxygen-Free Copper) material
• Color: Black

NVX NSW104 Version 3 (NSW104v3)

1000W Peak (500W RMS) N-Series v3 10" Dual 4-Ohm Car Subwoofer

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1000W Peak (500W RMS) N-Series v3 10" Dual 4-Ohm Car Subwoofer

• Peak Power: 1000 watts
• RMS Power: 500 watts
• Impedance: Dual 4 ohm
• Enhanced Pressed Paper Cone
• High Roll Foam Surround
• Mount depth: 5.36"
• Sensitivity: 85 dB

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60
List price $107.99
-17% $89.99

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Available Offers (2) for NVX NSW104 Version 3 (NSW104v3)
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List price $107.99
-17% $89.99
$80.99 with coupon | Price details
2026-06-28 23:59:00
Purchase $400 or More of NVX and Save 15%!
2026-07-27 11:08:20
Used from: $62.99
Limited time!

NVX NE102S

Dual 10" Sealed 3/4" MDF Black Carpeted Subwoofer Enclosure – 1.2 Cu. Ft. with Polyfil and NVX Logo

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Dual 10" Sealed 3/4" MDF Black Carpeted Subwoofer Enclosure – 1.2 Cu. Ft. with Polyfil and NVX Logo

• 10" Dual Sealed Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Internal box volume: 1.20 cubic feet
• Premium Black Carpet with Black NVX Logo

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3
List price $143.99
-17% $119.99

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• 10" Dual Sealed Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Internal box volume: 1.20 cubic feet
• Premium Black Carpet with Black NVX Logo

Limited time!

NVX XIX2025

0.82 ft (0.25 meter) 2-Channel X-Series RCA Audio Interconnect Cable

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0.82 ft (0.25 meter) 2-Channel X-Series RCA Audio Interconnect Cable

• 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

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21
List price $19.99
-25% $14.99

In stock

• 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

Limited time!

NVX XWS12100

100 ft 12-Gauge EnvyFlex 100% Oxygen Free Copper Speaker Wire (Blue/Gray)

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100 ft 12-Gauge EnvyFlex 100% Oxygen Free Copper Speaker Wire (Blue/Gray)

• True Spec 12 gauge EnvyFlex Speaker Wire
• Silver-tinned OFC (100% Oxygen-Free Copper) material
• Color: Blue and Gray
• Translucent EnvyFlex flexible multi-strand construction

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List price $89.99
-17% $74.99

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• True Spec 12 gauge EnvyFlex Speaker Wire
• Silver-tinned OFC (100% Oxygen-Free Copper) material
• Color: Blue and Gray
• Translucent EnvyFlex flexible multi-strand construction

NVX NBA201

1400W Peak (700W RMS) Class AB N-Series 2-Channel Car Amplifier

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1400W Peak (700W RMS) Class AB N-Series 2-Channel Car Amplifier

• 200 watts x 2 channel @ 4 ohm
• 350 watts x 2 channel @ 2 ohm
• Bridged: 700 watts x 1 channel @ 4 ohm
• Total RMS Power: 700 watts
• Class A/B 2 ohm Stable 2-Channel Amplifier

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List price $249.99
-60% $99.99

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Available Offers (2) for NVX NBA201
Save 30% on an NVX XKIT42 Amp Kit with Purchase! Add a qualifying amplifier to your cart and save 30% on the NVX XKIT42 Amp Kit! No code needed — discount applies automatically at checkout.
Purchase $400 or More of NVX and Save 15%!
2026-07-27 11:08:20
Used from: $129.99 Like New from: $139.99
Limited time!

NVX XW0BL10

10 ft 1/0-Gauge EnvyFlex True Spec Oxygen-Free Copper Power and Ground Wire (Blue)

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10 ft 1/0-Gauge EnvyFlex True Spec Oxygen-Free Copper Power and Ground Wire (Blue)

• 10 feet 1/0 gauge Power and Ground Wire
• Silver-tinned OFC (100% Oxygen-Free Copper) material
• Color: Blue

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3
List price $89.99
-33% $59.99

In stock

• 10 feet 1/0 gauge Power and Ground Wire
• Silver-tinned OFC (100% Oxygen-Free Copper) material
• Color: Blue

Limited time!

NVX VCW10GR

Mesh Grille for NVX 10" VC-Series V1 and V2 Subwoofers

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Mesh Grille for NVX 10" VC-Series V1 and V2 Subwoofers

• Mesh grille for select NVX 10" subwoofers
Does not work with NVX VC-series V3 subs
• Designed to fit NVX VC-series V1 and V2 subwoofers
• Pre-drilled bolt pattern

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• Mesh grille for select NVX 10" subwoofers
Does not work with NVX VC-series V3 subs
• Designed to fit NVX VC-series V1 and V2 subwoofers
• Pre-drilled bolt pattern

Limited time!

NVX VADM4 Version 2 (VADM4v2) (Open Box, Great)

500W RMS V-Series Micro Full-Range Class D 4-Channel Amplifier Car/Marine/Powersports Amplifier

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500W RMS V-Series Micro Full-Range Class D 4-Channel Amplifier Car/Marine/Powersports Amplifier

• 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-Channel Amplifier

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List price $237.99
-43% $136.49

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NVX XBRC Universal Remote Level Control

Universal with Female RCA Audio Interconnect For Car Amplifier/Amp Bass/Input

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Universal with Female RCA Audio Interconnect For Car Amplifier/Amp Bass/Input

• Universal Remote Level Control For Car Amplifier/Amp Bass Adjustment
• Only requires one additional RCA "Patch" Cable (sold separately)
• Mounts Under Dash Or Through Hole
• One 2-Channel RCA Input And one 2-Channel RCA Output

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List price $9.99
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Like New from: $7.64

• Universal Remote Level Control For Car Amplifier/Amp Bass Adjustment
• Only requires one additional RCA "Patch" Cable (sold separately)
• Mounts Under Dash Or Through Hole
• One 2-Channel RCA Input And one 2-Channel RCA Output

Limited time!

NVX XIN25

16.4 ft (5 meter) 2-Channel N-Series RCA Audio Interconnect Cable

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16.4 ft (5 meter) 2-Channel N-Series RCA Audio Interconnect Cable

• Shielded noise-rejecting coaxial construction
• Heavy gauge OFC conductors ensure superior sound quality
• Silver-Plated ends offer high-quality performance
• Molded ends equipped with colored channel identifiers

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9
List price $14.99
-73% $3.99

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• Shielded noise-rejecting coaxial construction
• Heavy gauge OFC conductors ensure superior sound quality
• Silver-Plated ends offer high-quality performance
• Molded ends equipped with colored channel identifiers

Limited time!

NVX XIX21

3.28 ft (1 meter) 2-Channel X-Series RCA Audio Interconnect Cable

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3.28 ft (1 meter) 2-Channel X-Series RCA Audio Interconnect Cable

• 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

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List price $21.99
-18% $17.99

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• 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

Limited time!

NVX XCW122RC

Recone Kit for XCW122 Subwoofers

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Recone Kit for XCW122 Subwoofers

• Kits are assembled to ensure perfect fitment and alignment
• Each kit includes all new soft moving parts
• Impedance: Dual 2-ohm
• CA glue adhesive is NOT included

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List price $179.99
-17% $149.99

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• Kits are assembled to ensure perfect fitment and alignment
• Each kit includes all new soft moving parts
• Impedance: Dual 2-ohm
• CA glue adhesive is NOT included

NVX - Worth the Envy - Direct to Consumer Car Audio

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    FAQ for Universal-Fit Audio & Electronics in 1981 Thunderbird

    Q: Can I upgrade or change the Universal-Fit Audio & Electronics in 1981 Ford Thunderbird?

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

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

    • You see only parts engineered for your exact vehicle
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    Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.