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 (139)

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 (21)

500–999.99 watts (41)

1,000–1,999.99 watts (75)

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 (200)

No (125)

Optional (82)

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 (224)

No (74)

Optional (71)

Yes - with included adapter (20)

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 6x9" Component Speakers with Installation Kit

Includes NVX 6x9" N-Series Component Speakers, Baffle, Premium Sound Damping, Rubber Roller, Installer's Panel Removal Kit

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NVX 6x9" Component Speakers with Installation Kit

Includes NVX 6x9" N-Series Component Speakers, Baffle, Premium Sound Damping, Rubber Roller, Installer's Panel Removal Kit

• 460 watts Peak Each, 160 watts RMS Each
• 3/4" Silk Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 89 dB
• Mounting Depth: 2.95"

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• 460 watts Peak Each, 160 watts RMS Each
• 3/4" Silk Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 89 dB
• Mounting Depth: 2.95"

Alpine S2-A55V with Belva 4 Gauge Amp Kit

540W RMS S-Series Class-D 5-Channel Car Amplifier

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Alpine S2-A55V with Belva 4 Gauge Amp Kit

540W RMS S-Series Class-D 5-Channel Car Amplifier

• 40 watts x 4 channel + 200 watts x 1 channel @ 4 ohm
• 60 watts x 4 channel + 300 watts x 1 channel @ 2 ohm
• Bridged: 120 watts x 2 channel @ 4 ohm + 300 watts x 1 channel @ 2 ohm
• Total RMS Power: 540 watts
• CEA-2006 Compliant
• Class D 2 ohm Stable 5-Channel Amplifier

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NVX Audio Upgrade Kit – QBSTA & Two Pair 6.5" Speakers

900W Max (300W RMS) 11" Powered Spare Tire Subwoofer Box w/ Remote Bass Knob, Two Pair 6.5" Coaxial Speakers, Amp Kit, Sound Damping, and Roller

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NVX Audio Upgrade Kit – QBSTA & Two Pair 6.5" Speakers

900W Max (300W RMS) 11" Powered Spare Tire Subwoofer Box w/ Remote Bass Knob, Two Pair 6.5" Coaxial Speakers, Amp Kit, Sound Damping, and Roller

• 11" Spare Tire Subwoofer System
• Built-In Class D Amplifier
• Top-mount amplifier controls
• Speaker-Level Inputs
• Wired Remote Bass Level Control
• Includes 6.5 Co-axial Speaker and Damping Kits

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263

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Alpine R2-A60F with Amplifier Wiring Kit

600W RMS R-Series Class-D 4-Channel Car Amplifier + NVX 4 Gauge 4-Channel Amp Wiring Kit

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Alpine R2-A60F with Amplifier Wiring Kit

600W RMS R-Series Class-D 4-Channel Car Amplifier + NVX 4 Gauge 4-Channel Amp Wiring Kit

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

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

Rockford Fosgate R2-300X4 with NVX 4 Gauge Amp Kit

300W RMS Prime Series Class D 4-Channel Amplifier

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Rockford Fosgate R2-300X4 with NVX 4 Gauge Amp Kit

300W RMS Prime Series Class D 4-Channel Amplifier

• 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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Diamond Audio MICRO4V2 with NVX 1/0 Gauge Amp Kit

600W Peak Series Class-D 4-Channel Compact Amplifier

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Diamond Audio MICRO4V2 with NVX 1/0 Gauge Amp Kit

600W Peak Series Class-D 4-Channel Compact Amplifier

• 80 watts x 4 channel @ 4 ohm
• 150 watts x 4 channel @ 2 ohm
• Bridged: 300 watts x 2 channel @ 4 ohm
• Total RMS Power: 600 watts
• Class D 2 ohm Stable 4-Channel Amplifier
• Includes Amplifier Wiring Kit

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Kicker Sub, Amp & Remote (TCWRT102, CXA400.1, CXARC) w/ Free Amp Install Kit

800W Peak Loaded Single 10" Sealed Truck Enclosure with Passive Radiator, 400W RMS Monoblock Car Amplifier, 8 Gauge Wiring Kit, and Bass Remote + Bundle

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Kicker Sub, Amp & Remote (TCWRT102, CXA400.1, CXARC) w/ Free Amp Install Kit

800W Peak Loaded Single 10" Sealed Truck Enclosure with Passive Radiator, 400W RMS Monoblock Car Amplifier, 8 Gauge Wiring Kit, and Bass Remote + Bundle

Kicker 800W Peak 10-Inch Sealed Truck Enclosure with Passive Radiator
400W RMS Class D CX-Series Monoblock Car Amplifier
8 Gauge Premium 2-Channel Amplifier Wiring Kit with RCA
Wired Bass Remote Controller for CX Series Amplifiers
Complete setup includes NVX Premium Can Insulator Koozie

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Kicker 800W Peak 10-Inch Sealed Truck Enclosure with Passive Radiator
400W RMS Class D CX-Series Monoblock Car Amplifier
8 Gauge Premium 2-Channel Amplifier Wiring Kit with RCA
Wired Bass Remote Controller for CX Series Amplifiers
Complete setup includes NVX Premium Can Insulator Koozie

Diamond Audio DMD500.1D with DMD102 Sub

500W RMS DMD Series Monoblock Class-D Amplifier + Pair (2) DMD Series 10" Subwoofer 2Ω DVC

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Diamond Audio DMD500.1D with DMD102 Sub

500W RMS DMD Series Monoblock Class-D Amplifier + Pair (2) DMD Series 10" Subwoofer 2Ω DVC

• 340 watts x 1 channel @ 4 ohm
• 500 watts x 1 channel @ 2 ohm
• Total RMS Power: 500 watts
• Class D 2 ohm Stable Monoblock Amplifier
• Includes 10 inch Subwoofer

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• 340 watts x 1 channel @ 4 ohm
• 500 watts x 1 channel @ 2 ohm
• Total RMS Power: 500 watts
• Class D 2 ohm Stable Monoblock Amplifier
• Includes 10 inch Subwoofer

NVX Audio Upgrade Kit – NPKG212 Bass Package with 2 Pair 6x9" Speakers

Includes Loaded Dual 12" Slot Ported Box, Monoblock Amp w/ Remote, 2 Pair 6x9" Coaxial Speakers, Amp Kit, Sound Damping, and Roller

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NVX Audio Upgrade Kit – NPKG212 Bass Package with 2 Pair 6x9" Speakers

Includes Loaded Dual 12" Slot Ported Box, Monoblock Amp w/ Remote, 2 Pair 6x9" Coaxial Speakers, Amp Kit, Sound Damping, and Roller

• 12" Loaded Dual Subwoofer Enclosure with Amplifier
• 500 watts RMS
• Class D Amplifier
• Variable Bass Boost
• Speaker-Level Inputs
• Wired Remote Bass Level Control
• Includes 6x9(2) Co-axial Speaker and Damping Kits

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Diamond Audio DES400.2D with NVX 8 Gauge Amp Kit

500W RMS DES Series Class-D 2-Channel Amplifier

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Diamond Audio DES400.2D with NVX 8 Gauge Amp Kit

500W RMS DES Series Class-D 2-Channel Amplifier

• 200 watts x 2 channel @ 4 ohm
• 250 watts x 2 channel @ 2 ohm
• Bridged: 500 watts x 1 channel @ 4 ohm
• Total RMS Power: 500 watts
• Class D 2 ohm Stable 2-Channel-Channel Amplifier
• Includes Amplifier Wiring Kit

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-16% $389.99

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NVX XQA25001 with NVX 1/0 Gauge Amp Kit

2500W RMS XQ-Series SQ Class D Strappable 1-Ohm Stable Monoblock Amplifier with X-Boost

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NVX XQA25001 with NVX 1/0 Gauge Amp Kit

2500W RMS XQ-Series SQ Class D Strappable 1-Ohm Stable Monoblock Amplifier with X-Boost

• 1000 watts x 1 channel @ 4 ohm
• 1500 watts x 1 channel @ 2 ohm
• 2500 watts x 1 channel @ 1 ohm
• Total RMS Power: 2500 watts
• Class D 1 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

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List price $1067.98

-53% $499.99

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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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List price $787.98

-18% $649.99

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JL Audio JD250/1 with Belva 8 Gauge Amp Kit

250W RMS JD Series Class-D Monoblock Amplifier

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JL Audio JD250/1 with Belva 8 Gauge Amp Kit

250W RMS JD Series Class-D Monoblock Amplifier

• 150 watts x 1 channel @ 4 ohm
• 250 watts x 1 channel @ 2 ohm
• Total RMS Power: 250 watts
• Class D 2 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

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• 150 watts x 1 channel @ 4 ohm
• 250 watts x 1 channel @ 2 ohm
• Total RMS Power: 250 watts
• Class D 2 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

Cerwin Vega B52 with NVX 4 Gauge Amp Kit

1000W 2-Channel Bomber Series Class D Amplifier + NVX 4 Gauge 2-Channel Amp Kit

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Cerwin Vega B52 with NVX 4 Gauge Amp Kit

1000W 2-Channel Bomber Series Class D Amplifier + NVX 4 Gauge 2-Channel Amp Kit

• RMS: 200 Watts x 2 @ 4 ohm, 250 Watts x 2 @ 2 ohm, Bridged: 500 Watts x 1 @ 4 ohm
• Total Peak Power: 1000 Watts
• Class D IR Chipset with DirectFET Power Mosfet Output
• Wired remote bass level control included
• Ultra Compact High Density Aluminum Alloy Chassis
• Dimensions: 4.02" W x 6.61" L x 1.40" H

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125

List price $539.98

-25% $406.98

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Crunch GP-1500.4 with Belva BAK44 Amp Kit

1500W RMS Class AB Ground Pounder Series 4 Channel Car Amplifier + 4 Gauge Premium (CCA) Complete 4-Channel Amplifier Wiring Kit with RCA up to 1200 Watts

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Crunch GP-1500.4 with Belva BAK44 Amp Kit

1500W RMS Class AB Ground Pounder Series 4 Channel Car Amplifier + 4 Gauge Premium (CCA) Complete 4-Channel Amplifier Wiring Kit with RCA up to 1200 Watts

• 185 watts x 4 channel @ 4 ohm
• 375 watts x 4 channel @ 2 ohm
• Bridged: 750 watts x 2 channel @ 4 ohm
• Total RMS Power: 1500 watts
• Class A/B 2 ohm Stable 4-Channel Amplifier

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List price $219.98

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• 185 watts x 4 channel @ 4 ohm
• 375 watts x 4 channel @ 2 ohm
• Bridged: 750 watts x 2 channel @ 4 ohm
• Total RMS Power: 1500 watts
• Class A/B 2 ohm Stable 4-Channel Amplifier

2 Pairs Kicker KSC65 Speakers + CXA360.4 Amplifier w/ Free Amp Install Kit

400W Peak 6.5" KS Series 2-Way Coaxial Speakers and 360W RMS CX-Series 4-Channel Amplifier with 8 Gauge Wiring Kit and NVX Can Insulator Sleeve

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2 Pairs Kicker KSC65 Speakers + CXA360.4 Amplifier w/ Free Amp Install Kit

400W Peak 6.5" KS Series 2-Way Coaxial Speakers and 360W RMS CX-Series 4-Channel Amplifier with 8 Gauge Wiring Kit and NVX Can Insulator Sleeve

Kicker 400W Peak 6.5-Inch KS Series 2-Way Coaxial Speakers
360W RMS Class AB CX-Series 4-Channel Car Amplifier
8-Gauge Premium CCA 4-Channel Amplifier Wiring Kit with RCA
Premium Polyurethane Foam Can Insulator Sleeve Koozie
Complete car audio bundle includes high-performance components and installation accessories

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List price $619.94

-21% $490.00

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Kicker 400W Peak 6.5-Inch KS Series 2-Way Coaxial Speakers
360W RMS Class AB CX-Series 4-Channel Car Amplifier
8-Gauge Premium CCA 4-Channel Amplifier Wiring Kit with RCA
Premium Polyurethane Foam Can Insulator Sleeve Koozie
Complete car audio bundle includes high-performance components and installation accessories

NVX Audio Upgrade Kit – QB12SPA with 6.5" & 6x9" Speakers

1200W MAX (350W RMS) Single 12" Amplified Ported Sub Enclosure w/ Remote Bass Knob, 6.5" & 6x9" Coaxial Speakers, Amp Kit, Sound Damping, and Roller

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NVX Audio Upgrade Kit – QB12SPA with 6.5" & 6x9" Speakers

1200W MAX (350W RMS) Single 12" Amplified Ported Sub Enclosure w/ Remote Bass Knob, 6.5" & 6x9" Coaxial Speakers, Amp Kit, Sound Damping, and Roller

• 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 6.5 and 6x9 Co-axial Speaker and Damping Kits

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Rockford Fosgate P1000X1bd with Amplifier Wiring Kit

1000W RMS Punch Series Monoblock Class BD Car Power Amplifier

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Rockford Fosgate P1000X1bd with Amplifier Wiring Kit

1000W RMS Punch Series Monoblock Class BD Car Power Amplifier

• RMS: 300W x 1 @ 4 ohm, 500W x 1 @ 2 ohm, 1000W x 1 @ 1 ohm
• Total RMS Power: 1000W
• CEA-2006 Compliant
• Tuned Bass EQ: 0 to +18 dB
• Super Efficient Class BD Circuitry
• Dimensions: 13-5/16"L x 7-3/4"W x 2-3/8"H

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List price $609.98

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Kenwood KAC-D3104 with Amplifier Wiring Kit

Class D 4-Channel Amplifier (600 Watts Peak Power)

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Kenwood KAC-D3104 with Amplifier Wiring Kit

Class D 4-Channel Amplifier (600 Watts Peak Power)

• 4 ohm: 50 watts x 4 chan.
• 2 ohm: 75 watts x 4 chan.
• Total Peak Power: 600 Watts
• Speaker Level Input
• Signal Sensing Turn-On
• Variable Low Pass/High Pass Filter
• Includes Amplifier Wiring Kit

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List price $409.99

-33% $273.49

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DS18 ZR1500.1D with NVX 4 Gauge Amp Kit

4500W RMS ZR Series Class-D Monoblock Amplifier

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DS18 ZR1500.1D with NVX 4 Gauge Amp Kit

4500W RMS ZR Series Class-D Monoblock Amplifier

• 550 watts x 1 channel @ 4 ohm
• 950 watts x 1 channel @ 2 ohm
• 1500 watts x 1 channel @ 1 ohm
• Total RMS Power: 4500 watts
• Class D 1 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

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NVX 6x9" Component Speakers with Installation Kit

NVX 6x9" Component Speakers with Installation Kit

Alpine S2-A55V with Belva 4 Gauge Amp Kit

Alpine S2-A55V with Belva 4 Gauge Amp Kit

NVX Audio Upgrade Kit – QBSTA & Two Pair 6.5" Speakers

NVX Audio Upgrade Kit – QBSTA & Two Pair 6.5" Speakers

Alpine R2-A60F with Amplifier Wiring Kit

Alpine R2-A60F with Amplifier Wiring Kit

Rockford Fosgate R2-300X4 with NVX 4 Gauge Amp Kit

Rockford Fosgate R2-300X4 with NVX 4 Gauge Amp Kit

Diamond Audio MICRO4V2 with NVX 1/0 Gauge Amp Kit

Diamond Audio MICRO4V2 with NVX 1/0 Gauge Amp Kit

Kicker Sub, Amp & Remote (TCWRT102, CXA400.1, CXARC) w/ Free Amp Install Kit

Kicker Sub, Amp & Remote (TCWRT102, CXA400.1, CXARC) w/ Free Amp Install Kit

Diamond Audio DMD500.1D with DMD102 Sub

Diamond Audio DMD500.1D with DMD102 Sub

NVX Audio Upgrade Kit – NPKG212 Bass Package with 2 Pair 6x9" Speakers

NVX Audio Upgrade Kit – NPKG212 Bass Package with 2 Pair 6x9" Speakers

Diamond Audio DES400.2D with NVX 8 Gauge Amp Kit

Diamond Audio DES400.2D with NVX 8 Gauge Amp Kit

NVX XQA25001 with NVX 1/0 Gauge Amp Kit

NVX XQA25001 with NVX 1/0 Gauge Amp Kit

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

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

JL Audio JD250/1 with Belva 8 Gauge Amp Kit

JL Audio JD250/1 with Belva 8 Gauge Amp Kit

Cerwin Vega B52 with NVX 4 Gauge Amp Kit

Cerwin Vega B52 with NVX 4 Gauge Amp Kit

Crunch GP-1500.4 with Belva BAK44 Amp Kit

Crunch GP-1500.4 with Belva BAK44 Amp Kit

2 Pairs Kicker KSC65 Speakers + CXA360.4 Amplifier w/ Free Amp Install Kit

2 Pairs Kicker KSC65 Speakers + CXA360.4 Amplifier w/ Free Amp Install Kit

NVX Audio Upgrade Kit – QB12SPA with 6.5" & 6x9" Speakers

NVX Audio Upgrade Kit – QB12SPA with 6.5" & 6x9" Speakers

Rockford Fosgate P1000X1bd with Amplifier Wiring Kit

Rockford Fosgate P1000X1bd with Amplifier Wiring Kit

Kenwood KAC-D3104 with Amplifier Wiring Kit

Kenwood KAC-D3104 with Amplifier Wiring Kit

DS18 ZR1500.1D with NVX 4 Gauge Amp Kit

DS18 ZR1500.1D with NVX 4 Gauge Amp Kit

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