Garage
Shop

2003 Mitsubishi Eclipse

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 2003 Mitsubishi Eclipse

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

We are sorry, no available results!

filter-icon Filters & Sort
Limited time!

NVX XBTU

Positive/Negative Battery Terminal Clamp with One 1/0 or 4 Gauge and Two 4 or 8 Gauge Outputs

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

Positive/Negative Battery Terminal Clamp with One 1/0 or 4 Gauge and Two 4 or 8 Gauge Outputs

• Positive or Negative Battery Terminal Clamp
• Connects to the positive or negative battery terminal
• Splits the connection to 3 outputs
• One 1/0 or 4 Gauge and two 4 or 8 Gauge outputs

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

19
List price $24.99
-40% $14.99

In stock

• Positive or Negative Battery Terminal Clamp
• Connects to the positive or negative battery terminal
• Splits the connection to 3 outputs
• One 1/0 or 4 Gauge and two 4 or 8 Gauge outputs

Limited time!

NVX XFLOC4

4-Channel 160W Adjustable Line Output Converter with Remote Turn On

XFLOC4 big
Go to item page Right Arrow Icon of Right Arrow

4-Channel 160W Adjustable Line Output Converter with Remote Turn On

• 3:1 Step Down With Adjustable Output
• DC Amplifier Turn On Trigger
• 160w Maximum Input Total (40w Per Channel)

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

31
List price $23.74
-7% $21.99

In stock

Used from: $13.99 Like New from: $18.69

• 3:1 Step Down With Adjustable Output
• DC Amplifier Turn On Trigger
• 160w Maximum Input Total (40w Per Channel)

NVX - Worth the Envy - Direct to Consumer Car Audio
Limited time!

NVX VSLR39

39-Ohm Load Resistors for all makes and models 2005-2015 with OEM Sound Systems

VSLR39 big
Go to item page Right Arrow Icon of Right Arrow

39-Ohm Load Resistors for all makes and models 2005-2015 with OEM Sound Systems

• 39 Ohm Load Resistors
• Prevents Audio Shutdown and Distortion
• Compatible with most devices with speaker-level inputs
• Sold as a pair

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

2
List price $39.99
-63% $14.99

In stock

Used from: $10.49

• 39 Ohm Load Resistors
• Prevents Audio Shutdown and Distortion
• Compatible with most devices with speaker-level inputs
• Sold as a pair

Limited time!

NVX XAGU48

4/8 Gauge AWG AGU In-ine Fuse Holder for Car Audio and Marine Audio

XAGU48 big
Go to item page Right Arrow Icon of Right Arrow

4/8 Gauge AWG AGU In-ine Fuse Holder for Car Audio and Marine Audio

• 4/8 Gauge In-line Fuse Holder
• Satin Chrome Plated For Excellent Power Transfer And Great Design
• Screw Terminals Hold Cables Securely In Place
• Smoked Heat Resistant Housing

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

19
List price $9.99
-50% $4.99

In stock

• 4/8 Gauge In-line Fuse Holder
• Satin Chrome Plated For Excellent Power Transfer And Great Design
• Screw Terminals Hold Cables Securely In Place
• Smoked Heat Resistant Housing

Limited time!

NVX XFMANL

0/4 Gauge AWG ANL/Mini-ANL Modular Linkable In-ine Fuse Holder for Car Audio and Marine Audio

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

0/4 Gauge AWG ANL/Mini-ANL Modular Linkable In-ine Fuse Holder for Car Audio and Marine Audio

• See-through windows allow for easy inspection
• High-temperature, impact-resistant plastic casings
• Ultimate circuit protection
• High conductivity plating
• Maximum current transfer

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

4
List price $59.99
-75% $14.99

In stock

• See-through windows allow for easy inspection
• High-temperature, impact-resistant plastic casings
• Ultimate circuit protection
• High conductivity plating
• Maximum current transfer

Limited time!

NVX BIR200 (Open Box, Good)

200 Amp Relay Isolator (BIR200)

BIR200 big
Go to item page Right Arrow Icon of Right Arrow

200 Amp Relay Isolator (BIR200)

• 200 Amp Battery Isolator
• 200 Amps at 12V Continuous
• 300 Amps Surge
• Switching Power: 10 - 16 VDC

10% Off Open Box!
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 $59.99
-50% $29.99
$26.99 with coupon | Price details

In stock

• 200 Amp Battery Isolator
• 200 Amps at 12V Continuous
• 300 Amps Surge
• Switching Power: 10 - 16 VDC

Limited time!

NVX BIR80

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

BIR80 big
Go to item page Right Arrow Icon of Right Arrow

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

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 $19.99
-20% $15.99

In stock

• 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 XW0BL10

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

XW0BL10 big
Go to item page Right Arrow Icon of Right Arrow

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

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

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 XWS1275

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

XWS1275 big
Go to item page Right Arrow Icon of Right Arrow

75 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

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

14
List price $124.99
-52% $59.99

In stock

• 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

Limited time!

NVX VSW124 Version 3 (VSW124v3)

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

VSW124v3 big
Go to item page Right Arrow Icon of Right Arrow

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

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

38
List price $155.99
-17% $129.99

In stock

Limited time!

NVX UNIFRING

Universal Self-Adhesive Foam Speaker Baffle Ring Kit (Pack of 6)

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

Universal Self-Adhesive Foam Speaker Baffle Ring Kit (Pack of 6)

• Universal Self-Adhesive Foam Speaker Baffle Ring Kit
• Waterproof automotive-grade high-density foam strips
• Prevents front and rear wave cancellation and panel vibrations
• Designed for use with 1" to 6x9" speakers
• Pack of 6

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
5
List price $35.98
-17% $29.99

In stock

Limited time!

NVX XIX45

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

XIX45 big
Go to item page Right Arrow Icon of Right Arrow

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

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

24
List price $28.99
-17% $23.99

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

NVX XW4WH5

5 ft 4-Gauge EnvyFlex True Spec Oxygen-Free Copper Power and Ground Wire (White)

XW4WH5 big
Go to item page Right Arrow Icon of Right Arrow

5 ft 4-Gauge EnvyFlex True Spec Oxygen-Free Copper Power and Ground Wire (White)

• 5 feet 4 gauge Power and Ground Wire
• Silver-tinned OFC (100% Oxygen-Free Copper) material
• Color: White

2+ offers available
shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

6
List price $29.99
-33% $19.99

In stock

Continue to cart

Available Offers (2) for NVX XW4WH5
Offer image
Prime Time! Save 15% at Checkout!
List price $29.99
-33% $19.99
$16.99 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

• 5 feet 4 gauge Power and Ground Wire
• Silver-tinned OFC (100% Oxygen-Free Copper) material
• Color: White

Limited time!

NVX NV12GR v2 (Gen 2) Larger Hole Pattern

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

NV12GR big
Go to item page Right Arrow Icon of Right Arrow

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

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

5
List price $19.99
-20% $15.99

In stock

• 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

NE102P big
Go to item page Right Arrow Icon of Right Arrow

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

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

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 NE122S

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

NE122S big
Go to item page Right Arrow Icon of Right Arrow

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

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

2
List price $155.99
-17% $129.99

In stock

• 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 XWS12100

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

XWS12100 big
Go to item page Right Arrow Icon of Right Arrow

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

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

8
List price $89.99
-17% $74.99

In stock

• 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

NBA201 big
Go to item page Right Arrow Icon of Right Arrow

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

2+ offers available
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 $249.99
-60% $99.99

In stock

Continue to cart

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

NVX NSW104 Version 3 (NSW104v3)

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

NSW104v3 big
Go to item page Right Arrow Icon of Right Arrow

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

2+ offers available
shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

43
List price $107.99
-17% $89.99

In stock

Continue to cart

Available Offers (2) for NVX NSW104 Version 3 (NSW104v3)
Offer image
Prime Time! Save 10% at Checkout!
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: $53.99
Limited time!

NVX XIX2025

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

XIX2025 big
Go to item page Right Arrow Icon of Right Arrow

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

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

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

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 2003 Eclipse

    Q: Can I upgrade or change the Universal-Fit Audio & Electronics in 2003 Mitsubishi Eclipse?

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

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

    2016 Lexus LS600hL

    2007 Lexus LS460

    1995 Suzuki Sidekick

    2003 Mitsubishi Eclipse

    1984 Mercury Capri

    1984 Jeep Scrambler

    1990 Dodge Caravan

    1992 Ford E Series

    2016 Ford C-Max

    1996 Ford Contour

    Vehicle
    Store
    Delete

    2017 Can-Am Defender MAX HD8 DPS

    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.