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1991 Mazda RX-7

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 1991 Mazda RX-7

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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NVX XBTPN08

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

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

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

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33
List price $24.99
-40% $14.99

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

Crux CSS-41

4-Input Automatic Video Switcher

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4-Input Automatic Video Switcher

• 4 Input Automatic Video Switcher
• Automatic left and right turn signal triggering
• Automatic backup to front camera switching
• Includes 4 camera inputs

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1
List price $121.80
-36% $78.30

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Only 3 Left!

• 4 Input Automatic Video Switcher
• Automatic left and right turn signal triggering
• Automatic backup to front camera switching
• Includes 4 camera inputs

JL Audio SGRU-12

Mesh Grille for JL Audio 12" W0v3, W1v3 and W3v3 Subwoofers

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Mesh Grille for JL Audio 12" W0v3, W1v3 and W3v3 Subwoofers

• 12" Grille made specifically for the JL Audio 12W1v2, 12W3v3, or 12TW5 Sub
• Provides the Best Protection Possible
• Top-Notch JL Audio Quality
• Metal Mesh Grille Painted Black

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19
$49.99

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• 12" Grille made specifically for the JL Audio 12W1v2, 12W3v3, or 12TW5 Sub
• Provides the Best Protection Possible
• Top-Notch JL Audio Quality
• Metal Mesh Grille Painted Black

2 Pack of 300 Amp Nickel-Plated ANL Fuse (Belva BANL300)

Two fuses per order. High quality 300 Amp ANL Fuses

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Two fuses per order. High quality 300 Amp ANL Fuses

• 300A ANL Fuse
• 2 Pack
• Nickel Plated
• Resealable Polybag
• Heavy Duty Construction

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19
List price $7.99
-50% $3.99

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• 300A ANL Fuse
• 2 Pack
• Nickel Plated
• Resealable Polybag
• Heavy Duty Construction

Install Bay PSP4

4" x 11" ABS Port Tube Kit - Black

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4" x 11" ABS Port Tube Kit - Black

• Port Tube Kit for ported enclosures
• Perfect for custom or replacement ported enclosures
• 4"W x 11"L
• Durable ABS plastic construction

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2
List price $38.99
-10% $34.99

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• Port Tube Kit for ported enclosures
• Perfect for custom or replacement ported enclosures
• 4"W x 11"L
• Durable ABS plastic construction

DS18 XM3

3-Way Active Crossover with Subwoofer Level Control and Bass Knob

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3-Way Active Crossover with Subwoofer Level Control and Bass Knob

• 3-Way active crossover with sub-level control
• Mixed input and output
• Level output knob with individual output
• Features front and rear high-pass filters
• Includes remote subwoofer level control
• Stereo or mono subwoofer mode selector

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$124.95

In stock

• 3-Way active crossover with sub-level control
• Mixed input and output
• Level output knob with individual output
• Features front and rear high-pass filters
• Includes remote subwoofer level control
• Stereo or mono subwoofer mode selector

NVX NBTERM2

Square Push Style Outer Design Terminal Cups With Chrome-Plated Contacts

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Square Push Style Outer Design Terminal Cups With Chrome-Plated Contacts

• Universal Square Chrome-plated Terminal Cup for Speaker & Subwoofer boxes
• Chrome-plated contacts for optimal signal transfer
• Screw binding posts for a tight secure connection
• Positive (Red) and negative (Black) indicators to ensure proper wiring
• Easy to install and use

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10
List price $9.99
-30% $6.99

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• Universal Square Chrome-plated Terminal Cup for Speaker & Subwoofer boxes
• Chrome-plated contacts for optimal signal transfer
• Screw binding posts for a tight secure connection
• Positive (Red) and negative (Black) indicators to ensure proper wiring
• Easy to install and use

JL Audio SGRU-10

Mesh Grille for JL Audio 10" W0v3, W1v3 and W3v3 Subwoofers

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Mesh Grille for JL Audio 10" W0v3, W1v3 and W3v3 Subwoofers

• 10" Grille made Specifically for the JL Audio 10W1v2 or 10W3v3 Sub
• Provides the Best Protection Possible
• Top-Notch JL Audio Quality
• Metal Mesh Grille Painted Black

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24
$39.99

In stock

• 10" Grille made Specifically for the JL Audio 10W1v2 or 10W3v3 Sub
• Provides the Best Protection Possible
• Top-Notch JL Audio Quality
• Metal Mesh Grille Painted Black

NVX XWS1225

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

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25 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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56
List price $49.99
-40% $29.99

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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

Crux CUB-15

Universal Bullet Backup Camera

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Universal Bullet Backup Camera

• Universal Rear View Backup Camera
• Mounting Style: Flush Mount (push-in)
• Viewing Angle: 170° wide view angle
• Resolution: 480 TV Lines
• Waterproof: Yes (IP67-rated)
• Nightvision: Low-light

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List price $81.90
-36% $52.65

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• Universal Rear View Backup Camera
• Mounting Style: Flush Mount (push-in)
• Viewing Angle: 170° wide view angle
• Resolution: 480 TV Lines
• Waterproof: Yes (IP67-rated)
• Nightvision: Low-light

Belva BBSW167

16 Gauge 7 Meter (23 Ft) Speaker Wire (CCA)

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16 Gauge 7 Meter (23 Ft) Speaker Wire (CCA)

• 7 Meters
• 16 Gauge Speaker Wire
• High Strand Count for Maximum Flexibility
• 23 Foot Length

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20
List price $24.99
-48% $12.99

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• 7 Meters
• 16 Gauge Speaker Wire
• High Strand Count for Maximum Flexibility
• 23 Foot Length

Belva BTK105

Five Piece Installer's Panel Removal Installation Tool Kit for Stereo, Speakers and Car Audio Installs

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Five Piece Installer's Panel Removal Installation Tool Kit for Stereo, Speakers and Car Audio Installs

• Five Piece Installer's Removal Tool Kit
• Durable Nylon Plastic

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73
List price $18.99
-37% $11.99

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• Five Piece Installer's Removal Tool Kit
• Durable Nylon Plastic

Limited time!

NVX XQC303 Dual USB Charger with Voltmeter, QC 3.0, USB Type-C+PD

Features voltage-readout, Qualcomm Quick Charge 3.0 fast charging and water-resistant cover

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Features voltage-readout, Qualcomm Quick Charge 3.0 fast charging and water-resistant cover

• Features Qualcomm Quick Charge 3.0
• Charges two devices simultaneously with USB-A & USB-C PD ports
• USB-C PD allows for faster and more flexible charging
• Charges devices 4x faster than conventional charging
• Compatible with most 12/24V charging systems
• Can be used nearly any application (Car/Truck/SUV/ATV/UTV/RV/Motorcycle/Marine)

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List price $29.99
-67% $9.99

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• Features Qualcomm Quick Charge 3.0
• Charges two devices simultaneously with USB-A & USB-C PD ports
• USB-C PD allows for faster and more flexible charging
• Charges devices 4x faster than conventional charging
• Compatible with most 12/24V charging systems
• Can be used nearly any application (Car/Truck/SUV/ATV/UTV/RV/Motorcycle/Marine)

Limited time!

NVX XCADJ1

High Resolution Waterproof Mini Backup Camera with Optional Color Guidelines

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High Resolution Waterproof Mini Backup Camera with Optional Color Guidelines

• Universal Rear View Backup Camera
• High Resolution 1089 HDCCD Image Sensor
• Mounting Style: Bracket Mount
• Viewing Angle: 170 ° (wide viewing)
• Resolution: 800 x 533 
• Waterproof: Yes (IP68 waterproof)
• Night vision: Low-light

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37
List price $119.99
-67% $39.99

In stock

Used from: $29.99

• Universal Rear View Backup Camera
• High Resolution 1089 HDCCD Image Sensor
• Mounting Style: Bracket Mount
• Viewing Angle: 170 ° (wide viewing)
• Resolution: 800 x 533 
• Waterproof: Yes (IP68 waterproof)
• Night vision: Low-light

PAC SNI-1

RCA Noise Filter

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RCA Noise Filter

• RCA Noise Filter
• Close to perfect response of +/- .03 dB from 20 Hz - 20kHz
• Eliminates ground loop noise
• Reduces most noise

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37
List price $19.00
-37% $11.99

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• RCA Noise Filter
• Close to perfect response of +/- .03 dB from 20 Hz - 20kHz
• Eliminates ground loop noise
• Reduces most noise

Limited time!

NVX VCW124 Version 3 (VCW124v3)

2400W Peak (1200W RMS) 12" VC-Series v3 Dual 4-ohm Car Subwoofer

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2400W Peak (1200W RMS) 12" VC-Series v3 Dual 4-ohm Car Subwoofer

• Peak Power: 2400 watts
• RMS Power: 1200 watts
• Impedance: Dual 4 ohm
• Carbon Fiber Enhanced Non-Pressed Paper Cone
• Custom High Roll Foam Surround with black nylon stitching
• Mount depth: 7.02"
• Sensitivity: 85 dB (1W/1m)

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132
List price $287.99
-17% $239.99

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NVX SQW104

1200W Peak (600W RMS) 10" SQ-Series Dual 4-ohm Shallow-Mount Car Subwoofer

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1200W Peak (600W RMS) 10" SQ-Series Dual 4-ohm Shallow-Mount Car Subwoofer

• Peak Power: 1200 watts
• RMS Power: 600 watts
• Impedance: Dual 4 ohm
• Polypropylene Cone
• Rubber Surround
• Mount depth: 3.23"
• Sensitivity: 83 dB

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List price $299.99
-17% $249.99

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• Peak Power: 1200 watts
• RMS Power: 600 watts
• Impedance: Dual 4 ohm
• Polypropylene Cone
• Rubber Surround
• Mount depth: 3.23"
• Sensitivity: 83 dB

Stinger SGP901501

150 AMP Circuit Breaker with Manual Reset

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150 AMP Circuit Breaker with Manual Reset

• Manual Reset Circuit Breaker
• Power Rating: 150 Amps
• Push Button Reset
• Water Resistant Housing
• Integrated Holes for Simple Mounting
• Compact and Lightweight Design

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5
List price $139.00
-53% $65.99

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• Manual Reset Circuit Breaker
• Power Rating: 150 Amps
• Push Button Reset
• Water Resistant Housing
• Integrated Holes for Simple Mounting
• Compact and Lightweight Design

Limited time!

Belva BAK42

4 Gauge Premium (CCA) Copper Clad Aluminum Complete 2-Channel Amplifier Wiring Kit with RCA for Amplifiers up to 1200 Watts - RED

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4 Gauge Premium (CCA) Copper Clad Aluminum Complete 2-Channel Amplifier Wiring Kit with RCA for Amplifiers up to 1200 Watts - RED

• Complete 4 Gauge Amplifier Installation Kit
• For Amplifiers Up To 1200 Watts RMS
• Premium (CCA) Copper Clad Aluminum
• Helical Twist 2-Channel RCA Cable
• ANL/Mini-ANL Fuse Holder with 80 amp fuse
• Complies to American Wire Gauge standards

FREE Belva Amp Kit at Checkout!
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169
List price $59.99
-42% $34.99

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Used from: $34.99
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Axxess AXSWC-2

Universal Steering Wheel Control Data Interface and Wiring Harness

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Universal Steering Wheel Control Data Interface and Wiring Harness

• Steering wheel control data interface
• Auto-detects the connected stereos
• Works with all stereo brands
• Non-volatile memory retains settings
• Universal fit for most vehicle models

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List price $129.99
-38% $79.99

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• Steering wheel control data interface
• Auto-detects the connected stereos
• Works with all stereo brands
• Non-volatile memory retains settings
• Universal fit for most vehicle models

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    FAQ for Universal-Fit Audio & Electronics in 1991 RX-7

    Q: Can I upgrade or change the Universal-Fit Audio & Electronics in 1991 Mazda RX-7?

    A: Yes this page includes all the best Universal-Fit Audio & Electronics that work in your RX-7.

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    • Owner's manual
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    • Vehicle produced after 2005: Inside driver's side door
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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
    • 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.