An amplifier increases the power of the signal being fed to it by taking energy from its power supply and matching the signal but increasing its amplitude. Amplifiers use many different methods for converting these electrical signals and have been categorized into classes.

Class A/B: Greater than 50% of the input signal is amplified while the other percentage is “off”. These amplifiers have a small amount of current flowing through the output transistors all the time which almost eliminates crossover distortion. Class A/B has great sound quality but is not as efficient as class D. These amps are most commonly used to drive speakers.

Class D: Also known as switching amplifiers, class D amps have output transistors that are completely turned “on” or “off”. This means that when the transistors are on, there is almost no voltage across them but when they are off there is significant voltage but no current flowing through it which makes these amplifiers very efficient at the cost of sound quality. These amps are most commonly used to drive subwoofers.

Other Classes: You may see classes such as GH, bD, X, FD, etc. by some manufactures. These amplifiers tend to be either class A/B, D or a hybrid of the two but with improvements to their designs that can make them more efficient or offer better sound quality.

Number of Channels

Each channel on an amplifier will power one speaker using a positive and negative cable. There are various types of amplifiers, each designed to power a certain number of speakers. Monoblock amplifiers, also known as single channel, are designed to power one or more subwoofers. These amplifiers often have very high power ratings. On the other hand, multi-channel amplifiers power multiple speakers, usually at lower power ratings. 2-Channel and 4-Channel amplifiers can power car speakers or low powered subwoofers. Occasionally you might see a 5 or 6-channel amplifier that can power speakers and subwoofers at the same time. The most common setup is a monoblock amp to run subwoofers and a 4-channel amp to run door speakers. Check out our Knowledge Base for more information.

Total RMS Power Output

Total RMS power is measured by multiplying RMS power per channel by the number of channels, and is calculated at the lowest level of operating impedance.

RMS power is the amount of continuous power, measured in watts, that an amplifier produces is called RMS power. The higher the RMS figure, the louder and cleaner your music sounds.

The RMS output figure is much more accurate than the peak rating when comparing products.

Up to 249.99 watts (22)

250–499.99 watts (82)

500–999.99 watts (135)

1,000–1,499.99 watts (61)

1,500 watts or more (65)

Total Peak Power Output

The total peak power output is measured as the wattage per channel multiplied by the number of channels, and is calculated at the lowest level of operating impedance.

It is measured during a brief musical burst, such as a sudden drum accent. Some manufacturers display peak power ratings on the face of their products to increase the appeal.

The RMS power rating is more accurate, and we recommend using it for product comparison.

Up to 499.99 watts (19)

500–999.99 watts (41)

1,000–1,999.99 watts (72)

2,000–2,999.99 watts (42)

3,000 watts or more (32)

Minimum Impedance Unbridged

The lowest impedance the amplifier will handle when it is not bridged.

Minimum Impedance Bridged

The lowest impedance the amplifier will handle when it is bridged.

Remote bass/level controller

If the amp comes with a bass/gain remote you will be able to control the level of your bass from your dashboard. Typically bass remotes also include a 16-20 ft. wire for installation.

Yes (195)

No (123)

Optional (77)

Preamp Outputs

Many amplifiers are equipped with RCA preamp outputs which pass the original music signal from the source to additional amplifiers. This is known as daisy chaining because the source connects to the first amp, and the first amp connects to the second amp, etc. The advantage to daisy chaining is you only need one 2-channel RCA cable to transfer the signal from the head-unit to the amplifier, and then one additional cable for each amp being daisy chained.

Built-in Crossover

A crossover is a type of filtering system that permits only certain frequencies to play. A Low-Pass (LP) crossover allows only frequencies below its setting to get through which is good in the case of some subwoofers. A High-Pass(HP) filter allows frequencies above its setting to pass through, this is normally used on speakers.

When a crossover is set to FULL it means no filtering is added and the full frequency spectrum is allowed through the amplifier. Filtering is important because feeding a speaker frequencies it cannot reproduce effectively creates distortion.

Speaker Level Inputs

Speaker level inputs are commonly referred to as high-level inputs and vice versa. This input type allows you to get your audio signal directly from the speaker wire in your vehicle, instead of using RCA cables. The advantage of this is factory integration, as most stock radios do not have RCA outputs to run amplifiers.

Yes (223)

No (72)

Optional (65)

Yes - with included adapter (18)

Maximum Input Gauge Size

This is the largest gauge wire that will fit into the power and ground terminals of this device. The lower the gauge number, the thicker the wire is. For example, a 4 gauge wire is thicker than an 8 gauge wire and thus has higher current carrying capacity. Always do your best to get this size wire to reduce the risk of damage to your components.

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NVX Audio Upgrade Kit – QB10SPA with 6x9" & 6.5" Speakers

1200W MAX (350W RMS) Single 10" Amplified Ported Sub Enclosure w/ Slot Ported Box, Remote, 6.5" & 6x9" Coaxial Speakers, Amp Kit, Sound Damping, and Roller

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NVX Audio Upgrade Kit – QB10SPA with 6x9" & 6.5" Speakers

1200W MAX (350W RMS) Single 10" Amplified Ported Sub Enclosure w/ Slot Ported Box, Remote, 6.5" & 6x9" Coaxial Speakers, Amp Kit, Sound Damping, and Roller

• 10" Amplified Loaded Subwoofer System
• 350 watts RMS
• Built-In Class D Amplifier
• Variable Bass Boost
• Speaker-Level Inputs
• Wired Remote Bass Level Control
• Includes 6.5 and 6x9 Co-axial Speaker and Damping Kits

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Sundown Audio SAV312D4 + NVX XCA3K

1 pair of 3000W Peak (1500W RMS) 12" SA Series Dual 4-ohm Subwoofer with Monoblock Amplifier with LED Remote Bass Knob

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Sundown Audio SAV312D4 + NVX XCA3K

1 pair of 3000W Peak (1500W RMS) 12" SA Series Dual 4-ohm Subwoofer with Monoblock Amplifier with LED Remote Bass Knob

• Peak Power: 3000 watts
• RMS Power: 1500 watts
• Impedance: Dual 4 ohm
• Competition-grade Paper cone
• Durable Foam surround
• Mount depth: 8.4"
• Sensitivity: 84.05 dB

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Diamond Audio HXM800.4D with NVX 8 Gauge Amp Kit

800W RMS HXM Series Class-D 4-Channel Full Range Amplifier

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Diamond Audio HXM800.4D with NVX 8 Gauge Amp Kit

800W RMS HXM Series Class-D 4-Channel Full Range Amplifier

• 120 watts x 4 channel @ 4 ohm
• 200 watts x 4 channel @ 2 ohm
• Bridged: 400 watts x 2 channel @ 4 ohm
• Total RMS Power: 800 watts
• Class D 2 ohm Stable 4-Channel-Channel Amplifier
• Includes Amplifier Wiring Kit

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Rockford Fosgate R2-500X1 with R2-2X10

Prime Series Class-D Monoblock Amplifier with Dual 2 Ohm 10" Sealed Loaded Enclosure

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Rockford Fosgate R2-500X1 with R2-2X10

Prime Series Class-D Monoblock Amplifier with Dual 2 Ohm 10" Sealed Loaded Enclosure

• 300 Watts RMS x 1 @ 4 ohm
• 500 Watts RMS x 1 @ 2 ohm
• Top Mounted Control Panel Class-D Amplifier
• Top Mounted Control Panel Class-D Amplifier
• Covered with High Density Carpet
• Dimensions: 12.2" H x 30.12" W x 7.14" D

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Rockford Fosgate M5-800X4 with NVX 8 Gauge Amp Kit

400W RMS M5-Series Class-AD 4-channel Marine Amplifier

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400W RMS M5-Series Class-AD 4-channel Marine Amplifier

• 100 watts x 4 channel @ 4 ohm
• 100 watts x 4 channel @ 2 ohm
• Bridged: 200 watts x 2 channel @ 4 ohm
• Total RMS Power: 400 watts
• Class AD 2 ohm Stable 4-Channel Amplifier
• Includes Amplifier Wiring Kit

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DS18 ZR1500.1D with Belva 4 Gauge Amp Kit

4500W Peak (1500W RMS) Class D 1-Channel Monoblock Amplifier

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DS18 ZR1500.1D with Belva 4 Gauge Amp Kit

4500W Peak (1500W RMS) Class D 1-Channel Monoblock Amplifier

• 550 watts x 1 channel @ 4 ohm
• 950 watts x 1 channel @ 2 ohm
• 1,500 watts x 1 channel @ 1 ohm
• Total RMS Power: 1,500 watts
• Class D 1 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

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NVX NDA6004 with Amp Wiring Kit

1200W Peak (600W RMS) N-Series Class-D 4-Channel Amplifier + NVX XKIT44 4 Gauge 4-Channel Premium Amp Wiring Kit

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NVX NDA6004 with Amp Wiring Kit

1200W Peak (600W RMS) N-Series Class-D 4-Channel Amplifier + NVX XKIT44 4 Gauge 4-Channel Premium Amp Wiring Kit

• 100 watts x 4 channel @ 4 ohm
• 160 watts x 4 channel @ 2 ohm
• Bridged: 320 watts x 2 channel @ 4 ohm
• Total RMS Power: 600 watts
• Class D 2 ohm Stable 4-Channel-Channel Amplifier
• Includes 4 Gauge Amp Wiring Kit

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Belva BXA15001 with Amplifier Wiring Kit

1500W Max Monoblock Class-AB Car Amplifier Package

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Belva BXA15001 with Amplifier Wiring Kit

1500W Max Monoblock Class-AB Car Amplifier Package

• 750 watts x 1 channel @ 4 ohm
• 1500 watts x 1 channel @ 2 ohm
• Total Peak Power: 1500 watts
• Class A/B 2 ohm Stable Monoblock
• Includes Amplifier Wiring Kit

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• 750 watts x 1 channel @ 4 ohm
• 1500 watts x 1 channel @ 2 ohm
• Total Peak Power: 1500 watts
• Class A/B 2 ohm Stable Monoblock
• Includes Amplifier Wiring Kit

Crunch GP-2000.4 with Belva 4 Gauge Amp Kit

Crunch 2000 Watts Ground Pounder Four Channel Car Audio Amplifier

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Crunch GP-2000.4 with Belva 4 Gauge Amp Kit

Crunch 2000 Watts Ground Pounder Four Channel Car Audio Amplifier

• Variable Electronic Crossover
• Class A/B Amplifier
• Switchable Bass Boost
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• Variable Electronic Crossover
• Class A/B Amplifier
• Switchable Bass Boost
• Includes Belva BAK44 4 Gauge Amp Wiring Kit

Diamond Audio DMD1000.1D with NVX 4 Gauge Amp Kit

1000W RMS DMD Series Class-D Monoblock Amplifier

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Diamond Audio DMD1000.1D with NVX 4 Gauge Amp Kit

1000W RMS DMD Series Class-D Monoblock Amplifier

• 680 Watts x 1 @ 4 ohm
• 1000 Watts x 1 @ 2 ohm
• N/A @ 1 ohm
• Total RMS Power: 1000 watts
• Class D 2 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

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• 680 Watts x 1 @ 4 ohm
• 1000 Watts x 1 @ 2 ohm
• N/A @ 1 ohm
• Total RMS Power: 1000 watts
• Class D 2 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

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Rockford Fosgate Punch P600X4 with Amplifier Wiring Kit

600W Punch Series 4-Channel Stereo Class AB Car Power Amplifier

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Rockford Fosgate Punch P600X4 with Amplifier Wiring Kit

600W Punch Series 4-Channel Stereo Class AB Car Power Amplifier

• 75W x 4-Chan. @ 4 ohm
• 150W x 4-Chan. @ 2 ohm
• Built In NOMAD "Real Time" Analog Computer
• 4/3/2/1 Channel Operation
• 4 Gauge Power and Ground Inputs
• MESHA3 Reduces MOSFET Temperatures for Improved Durability

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Kicker CXA1200.1 (46CXA12001T) with NVX 4 Gauge Amp Kit

1200W RMS Class-D CX-Series Monoblock Car Amplifier

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Kicker CXA1200.1 (46CXA12001T) with NVX 4 Gauge Amp Kit

1200W RMS Class-D CX-Series Monoblock Car Amplifier

• 600 watts x 1 channel @ 4 ohm
• 1200 watts x 1 channel @ 2 ohm
• 1200 watts x 1 channel @ 1 ohm
• Total RMS Power: 1200 watts
• Class D 1 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

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NVX QB12SPA with Free BAK82BL Amp Kit

1200W MAX (350W RMS) Single 12" Amplified Ported Loaded Subwoofer Enclosure with Remote Bass Knob + with 8 Gauge Premium (CCA) Complete 2-Channel Amplifier Wiring Kit

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NVX QB12SPA with Free BAK82BL Amp Kit

1200W MAX (350W RMS) Single 12" Amplified Ported Loaded Subwoofer Enclosure with Remote Bass Knob + with 8 Gauge Premium (CCA) Complete 2-Channel Amplifier Wiring Kit

• 12" Amplified Loaded Subwoofer System
• 350 watts RMS
• Built-In Class D Amplifier
• Variable Bass Boost
• Speaker-Level Inputs
• Wired Remote Bass Level Control
• Includes Amp Kit

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• 12" Amplified Loaded Subwoofer System
• 350 watts RMS
• Built-In Class D Amplifier
• Variable Bass Boost
• Speaker-Level Inputs
• Wired Remote Bass Level Control
• Includes Amp Kit

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Kicker L7S102 Subwoofer and NVX VADM1 v2 Amplifier, XKIT82 Amp Kit

1200W Peak (600W RMS) 10 inch Solo-Baric L7S Series Subwoofer with 600W RMS Monoblock Amplifier and 8 Gauge OFC Wiring Kit + Bundle

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Kicker L7S102 Subwoofer and NVX VADM1 v2 Amplifier, XKIT82 Amp Kit

1200W Peak (600W RMS) 10 inch Solo-Baric L7S Series Subwoofer with 600W RMS Monoblock Amplifier and 8 Gauge OFC Wiring Kit + Bundle

Kicker L7S102 1200W Peak 10-Inch Solo-Baric Dual 2-Ohm Subwoofer
NVX VADM1 v2 600W RMS Class D Monoblock Amplifier with Bass Remote
XKIT82 Full Spec 8 Gauge 100% OFC Oxygen Free Copper Wiring Kit
Comprehensive installation kit includes 2-channel RCA and support for up to 800W
Complete car marine and powersports audio solution for deep accurate bass

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Kicker L7S102 1200W Peak 10-Inch Solo-Baric Dual 2-Ohm Subwoofer
NVX VADM1 v2 600W RMS Class D Monoblock Amplifier with Bass Remote
XKIT82 Full Spec 8 Gauge 100% OFC Oxygen Free Copper Wiring Kit
Comprehensive installation kit includes 2-channel RCA and support for up to 800W
Complete car marine and powersports audio solution for deep accurate bass

Kicker 49L7TDF102 Subwoofer + NVX Amplifier (VADM1v2) w/ Free Amp Install Kit

500W RMS Loaded Single 10" Sealed Square Subwoofer Truck Enclosure with 600W RMS Monoblock Amplifier, 8 Gauge Wiring Kit, and NVX Koozie

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Kicker 49L7TDF102 Subwoofer + NVX Amplifier (VADM1v2) w/ Free Amp Install Kit

500W RMS Loaded Single 10" Sealed Square Subwoofer Truck Enclosure with 600W RMS Monoblock Amplifier, 8 Gauge Wiring Kit, and NVX Koozie

Kicker 49L7TDF102 500W RMS Loaded Single 10-Inch Sealed Square Subwoofer Truck Enclosure
VADM1 v2 600W RMS Class D Monoblock Amplifier with Bass Remote
XKIT82 8 Gauge 100% OFC Complete 2-Channel Amplifier Wiring Kit
Premium Polyurethane Foam Can Insulator Sleeve Koozies with Logo
Complete bundle designed for high-performance car and marine audio setups

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Kicker 49L7TDF102 500W RMS Loaded Single 10-Inch Sealed Square Subwoofer Truck Enclosure
VADM1 v2 600W RMS Class D Monoblock Amplifier with Bass Remote
XKIT82 8 Gauge 100% OFC Complete 2-Channel Amplifier Wiring Kit
Premium Polyurethane Foam Can Insulator Sleeve Koozies with Logo
Complete bundle designed for high-performance car and marine audio setups

DS18 SXE-4000.4D/RD (Red) with NVX 4 Gauge Amp Kit

4000W Peak (1500W RMS) Class D SXE Series 4-Channel Car Amplifier

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DS18 SXE-4000.4D/RD (Red) with NVX 4 Gauge Amp Kit

4000W Peak (1500W RMS) Class D SXE Series 4-Channel Car Amplifier

• 275 watts x 4 channel @ 4 ohm
• 430 watts x 4 channel @ 2 ohm
• Bridged: 750 watts x 2 channel @ 4 ohm
• Total RMS Power: 1500 watts
• Class D 2 ohm Stable 4-Channel-Channel Amplifier (Red)
• Includes Amplifier Wiring Kit

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Kenwood KAC-M5024BT with NVX 8 Gauge Amp Kit

300W RMS KAC Series Class-D 4-Channel Marine Amplifier With Bluetooth® Connectivity

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Kenwood KAC-M5024BT with NVX 8 Gauge Amp Kit

300W RMS KAC Series Class-D 4-Channel Marine Amplifier With Bluetooth® Connectivity

• 50 watts x 4 channel @ 4 ohm
• 75 watts x 4 channel @ 2 ohm
• Bridged: 150 watts x 2 channel @ 4 ohm
• Total RMS Power: 300 watts
• Class D 2 ohm Stable 4-Channel Amplifier
• Includes Amplifier Wiring Kit

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NVX XQA12001 with Amp Wiring Kit

1200W RMS 1-Ohm Stable Monoblock Amplifier + NVX 4 Gauge Amp Wiring Kit

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NVX XQA12001 with Amp Wiring Kit

1200W RMS 1-Ohm Stable Monoblock Amplifier + NVX 4 Gauge Amp Wiring Kit

• 500 watts x 1 channel @ 4 ohm
• 800 watts x 1 channel @ 2 ohm
• 1200 watts x 1 channel @ 1 ohm
• Total RMS Power: 1200 watts
• Class D 1 ohm Stable Monoblock Amplifier

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• 500 watts x 1 channel @ 4 ohm
• 800 watts x 1 channel @ 2 ohm
• 1200 watts x 1 channel @ 1 ohm
• Total RMS Power: 1200 watts
• Class D 1 ohm Stable Monoblock Amplifier

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Kicker TCWRT102 + NVX VADM1 v2 w/ Free Amp Install Kit

800W Peak Loaded Single 10" Sealed Truck Enclosure with Monoblock Amplifier, 8 Gauge OFC Wiring Kit, and NVX Can Insulator Koozie

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Kicker TCWRT102 + NVX VADM1 v2 w/ Free Amp Install Kit

800W Peak Loaded Single 10" Sealed Truck Enclosure with Monoblock Amplifier, 8 Gauge OFC Wiring Kit, and NVX Can Insulator Koozie

Kicker 10" 800W Peak Loaded Sealed Truck Enclosure with Passive Radiator
NVX 600W RMS Class D Monoblock Car/Marine/Powersports Amplifier with Bass Remote
Full Spec 8 Gauge 100% OFC Complete 2-Channel Amplifier Wiring Kit with RCA
Premium Polyurethane Foam Can Insulator Sleeve Koozie with Logo
Complete Bass Package includes Subwoofer Enclosure Mono Amplifier and Wiring Kit

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Kicker 10" 800W Peak Loaded Sealed Truck Enclosure with Passive Radiator
NVX 600W RMS Class D Monoblock Car/Marine/Powersports Amplifier with Bass Remote
Full Spec 8 Gauge 100% OFC Complete 2-Channel Amplifier Wiring Kit with RCA
Premium Polyurethane Foam Can Insulator Sleeve Koozie with Logo
Complete Bass Package includes Subwoofer Enclosure Mono Amplifier and Wiring Kit

Rockford Fosgate Prime R2-500X4 + Belva BAK44 4 Gauge Amp Wiring Kit

Rockford Prime 500W 4-Channel Full Range Class D Amplifier + Belva BAK44

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Rockford Fosgate Prime R2-500X4 + Belva BAK44 4 Gauge Amp Wiring Kit

Rockford Prime 500W 4-Channel Full Range Class D Amplifier + Belva BAK44

• 75 Watts RMS x 4 @ 4 ohm
• 125 Watts RMS x 4 @ 2 ohm
• Total Peak Power: 500 Watts
• CEA-2006 Compliant
• Top Mounted Control Panel
• 1.9" x "6.8" x "10.1"

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• 75 Watts RMS x 4 @ 4 ohm
• 125 Watts RMS x 4 @ 2 ohm
• Total Peak Power: 500 Watts
• CEA-2006 Compliant
• Top Mounted Control Panel
• 1.9" x "6.8" x "10.1"

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Car Amplifier Packages & Bundles for your 1981 B250

Your Vehicle

Shop the Category

NVX Audio Upgrade Kit – QB10SPA with 6x9" & 6.5" Speakers

NVX Audio Upgrade Kit – QB10SPA with 6x9" & 6.5" Speakers

Sundown Audio SAV312D4 + NVX XCA3K

Sundown Audio SAV312D4 + NVX XCA3K

Diamond Audio HXM800.4D with NVX 8 Gauge Amp Kit

Diamond Audio HXM800.4D with NVX 8 Gauge Amp Kit

Rockford Fosgate R2-500X1 with R2-2X10

Rockford Fosgate R2-500X1 with R2-2X10

Rockford Fosgate M5-800X4 with NVX 8 Gauge Amp Kit

Rockford Fosgate M5-800X4 with NVX 8 Gauge Amp Kit

DS18 ZR1500.1D with Belva 4 Gauge Amp Kit

DS18 ZR1500.1D with Belva 4 Gauge Amp Kit

NVX NDA6004 with Amp Wiring Kit

NVX NDA6004 with Amp Wiring Kit

Belva BXA15001 with Amplifier Wiring Kit

Belva BXA15001 with Amplifier Wiring Kit

Crunch GP-2000.4 with Belva 4 Gauge Amp Kit

Crunch GP-2000.4 with Belva 4 Gauge Amp Kit

Diamond Audio DMD1000.1D with NVX 4 Gauge Amp Kit

Diamond Audio DMD1000.1D with NVX 4 Gauge Amp Kit

Rockford Fosgate Punch P600X4 with Amplifier Wiring Kit

Rockford Fosgate Punch P600X4 with Amplifier Wiring Kit

Kicker CXA1200.1 (46CXA12001T) with NVX 4 Gauge Amp Kit

Kicker CXA1200.1 (46CXA12001T) with NVX 4 Gauge Amp Kit

NVX QB12SPA with Free BAK82BL Amp Kit

NVX QB12SPA with Free BAK82BL Amp Kit

Kicker L7S102 Subwoofer and NVX VADM1 v2 Amplifier, XKIT82 Amp Kit

Kicker L7S102 Subwoofer and NVX VADM1 v2 Amplifier, XKIT82 Amp Kit

Kicker 49L7TDF102 Subwoofer + NVX Amplifier (VADM1v2) w/ Free Amp Install Kit

Kicker 49L7TDF102 Subwoofer + NVX Amplifier (VADM1v2) w/ Free Amp Install Kit

DS18 SXE-4000.4D/RD (Red) with NVX 4 Gauge Amp Kit

DS18 SXE-4000.4D/RD (Red) with NVX 4 Gauge Amp Kit

Kenwood KAC-M5024BT with NVX 8 Gauge Amp Kit

Kenwood KAC-M5024BT with NVX 8 Gauge Amp Kit

NVX XQA12001 with Amp Wiring Kit

NVX XQA12001 with Amp Wiring Kit

Kicker TCWRT102 + NVX VADM1 v2 w/ Free Amp Install Kit

Kicker TCWRT102 + NVX VADM1 v2 w/ Free Amp Install Kit

Rockford Fosgate Prime R2-500X4 + Belva BAK44 4 Gauge Amp Wiring Kit

Rockford Fosgate Prime R2-500X4 + Belva BAK44 4 Gauge Amp Wiring Kit

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