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 (66)

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 (201)

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 (75)

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 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

Alpine R2-A60F with 6.5" + 6x9” Coaxial Speakers

600W RMS R-Series Class-D 4-Channel Car Amplifier + 600W Peak (200W RMS) 6.5" 200W RMS) 6x9" R-Series 2-way 4-ohm Coaxial Car Speakers

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Alpine R2-A60F with 6.5" + 6x9” Coaxial Speakers

600W RMS R-Series Class-D 4-Channel Car Amplifier + 600W Peak (200W RMS) 6.5" 200W RMS) 6x9" R-Series 2-way 4-ohm Coaxial Car Speakers

• 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
• Includes 6.5" + 6x9” Series Coaxial Speakers

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Pioneer GM-DX975 with Amplifier Wiring Kit

2000 Watts Class D 5-Channel Amplifier w/ Gold-plated RCA Terminals and Bass Boost Remote

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Pioneer GM-DX975 with Amplifier Wiring Kit

2000 Watts Class D 5-Channel Amplifier w/ Gold-plated RCA Terminals and Bass Boost Remote

• 75 Watts RMS x 4 @ 4 ohm + 350 watts RMS x 1
• 100 Watts RMS x 1 @ 2 ohm + 600 watts RMS x 1
• 1200 Watts RMS x 1 @ 1 ohm
• 5-channel operation
• CEA-2006 Compliant/Preamp Outputs/LPF
• HQ Sound Parts
• Gold-plated RCA connections
• Includes Amplifier Wiring Kit
• 12-7/16"W x 2"H x 7-7/8"D

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Kicker KGMDL7T12 Sub Enclosure + CXA1200.1 Amp w/ Free Amp Install Kit

Kicker 1200W RMS Dual 12" Sealed Truck Enclosure, 1200W RMS Class D Amplifier, Wired Bass Remote, NVX 4 Gauge OFC Wiring Kit, and Koozies + Bundle

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Kicker KGMDL7T12 Sub Enclosure + CXA1200.1 Amp w/ Free Amp Install Kit

Kicker 1200W RMS Dual 12" Sealed Truck Enclosure, 1200W RMS Class D Amplifier, Wired Bass Remote, NVX 4 Gauge OFC Wiring Kit, and Koozies + Bundle

Kicker 1200W RMS Loaded Dual 12-Inch Sealed Truck Enclosure
1200W RMS Class D CX-Series Monoblock Amplifier
Wired Bass Remote Controller for CX Series Amplifiers
NVX 4 Gauge 100% OFC Complete 2-Channel Amplifier Wiring Kit with RCA
Accessories include Premium Polyurethane Foam and Can Insulator Sleeve Koozies

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Kicker 1200W RMS Loaded Dual 12-Inch Sealed Truck Enclosure
1200W RMS Class D CX-Series Monoblock Amplifier
Wired Bass Remote Controller for CX Series Amplifiers
NVX 4 Gauge 100% OFC Complete 2-Channel Amplifier Wiring Kit with RCA
Accessories include Premium Polyurethane Foam and Can Insulator Sleeve Koozies

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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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Hertz SP 4.500 with NVX 8 Gauge Amp Kit

600W RMS SPL Show Series Class-D 4-3- 2-Channel Amplifier

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Hertz SP 4.500 with NVX 8 Gauge Amp Kit

600W RMS SPL Show Series Class-D 4-3- 2-Channel Amplifier

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

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

Kicker 52VCVR122 + NVX VADM1 v2 w/ Free Amp Install Kit

Kicker 900W Loaded Single 12" Vented Subwoofer Enclosure with NVX 600W RMS Monoblock Amp, 8 Gauge OFC Wiring Kit, and Can Insulator Koozie Bundle

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Kicker 52VCVR122 + NVX VADM1 v2 w/ Free Amp Install Kit

Kicker 900W Loaded Single 12" Vented Subwoofer Enclosure with NVX 600W RMS Monoblock Amp, 8 Gauge OFC Wiring Kit, and Can Insulator Koozie Bundle

Kicker 900W Peak Loaded Single 12-Inch Hatchback Vented Subwoofer Enclosure
NVX 600W RMS Class D Monoblock Car and Marine Amplifier with Bass Remote
Full Spec 8 Gauge 100% OFC Complete 2-Channel Amplifier Wiring Kit with RCA
Premium Polyurethane Foam Can Insulator Sleeve Koozies with Logo
Complete bass package includes loaded enclosure, power amplifier, and installation kit

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Kicker 900W Peak Loaded Single 12-Inch Hatchback Vented Subwoofer Enclosure
NVX 600W RMS Class D Monoblock Car and Marine Amplifier with Bass Remote
Full Spec 8 Gauge 100% OFC Complete 2-Channel Amplifier Wiring Kit with RCA
Premium Polyurethane Foam Can Insulator Sleeve Koozies with Logo
Complete bass package includes loaded enclosure, power amplifier, and installation kit

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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Rockford Fosgate Punch PM600X4 + NVX XKIT44

600W 4-Channel Punch Series Class AB Marine Amplifier + NVX 4 Gauge 4-Channel Amp Kit

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Rockford Fosgate Punch PM600X4 + NVX XKIT44

600W 4-Channel Punch Series Class AB Marine Amplifier + NVX 4 Gauge 4-Channel Amp Kit

• RMS: 75W x 4 @ 4 ohm, 150W x 4 @ 2 ohm, Bridged 300W x 2 @ 4ohm
• CEA-2006 Compliant
• Features C.L.E.A.N. Set-up
• Protected against Dust, UV, & Corrosion
• Marine grade two part epoxy coating on circuit boards

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Kicker 46CXA6605 with Amplifier Wiring Kit

360W RMS CX-Series Class-D 5-Channel Amplifier

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Kicker 46CXA6605 with Amplifier Wiring Kit

360W RMS CX-Series Class-D 5-Channel Amplifier

• 75 Watts RMS x 4 @ 2 ohm
• 2 ohm: 300 watts x 1 chan. Subwoofer Channel
• Total Peak Power: 600 Watts
• Preamp RCA outputs to daisy chain multiple amps
• Variable Low/High-Pass Crossover: 50 - 200Hz 12dB/octave
• Variable Bass Boost: 0 to +12 dB bass boost at 40 Hz
• Includes Amplifier Wiring Kit

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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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Wet Sounds SDX4 with NVX 4 Gauge Amp Kit

1370 Watt Sinister Series Full Range 4-Channel Class D Amplifier (WetSounds)

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Wet Sounds SDX4 with NVX 4 Gauge Amp Kit

1370 Watt Sinister Series Full Range 4-Channel Class D Amplifier (WetSounds)

• RMS: 185W x 4 @ 4 ohm, 340W x 4 @ 2 ohm, Bridged: 685W x 2 @ 4 ohm
• Total RMS Power: 1370 watts
• Wet Sounds unique transformer
• Advanced Intelligent Microprocessor Control
• Top mounted crossover controls
• Dimensions: 9.82" W x 13.50" L x 2.70" H
• Includes Amplifier Wiring Kit

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Cerwin Vega CVP800.2D + NVX XLCA2 Line-Output-Converter + Amp Kit

CVP Series 2-Channel Class-D Amplifier + NVX LOC with XBOOST Technology

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Cerwin Vega CVP800.2D + NVX XLCA2 Line-Output-Converter + Amp Kit

CVP Series 2-Channel Class-D Amplifier + NVX LOC with XBOOST Technology

• CVP Series 2-Channel Amplifier
• 85W x 2 @ 2Ω / 60W x 2 @ 4Ω
• Class-D Circuitry
• 2-Ohm Stereo, 4-Ohm Bridged Full Range Operation
• Direct Short, Thermal, & Overload Circuits Protect Amplifier
• 200mV-6V High Level or Low Level RCA Input

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Sundown Audio SW-SACL12D4 + NVX XCA3K

2 pairs of 750W RMS 12" SA Classic Series Dual 4-ohm Subwoofer with Monoblock Amplifier with LED Remote Bass Knob

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Sundown Audio SW-SACL12D4 + NVX XCA3K

2 pairs of 750W RMS 12" SA Classic Series Dual 4-ohm Subwoofer with Monoblock Amplifier with LED Remote Bass Knob

• RMS Power: 750 watts
• Impedance: Dual 4 ohm
• Competition Grade Paper Cone
• Mount depth: 6.5"
• Sensitivity: 84.22 dB

• Includes 2 pairs of Subwoofer with amplifier

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• RMS Power: 750 watts
• Impedance: Dual 4 ohm
• Competition Grade Paper Cone
• Mount depth: 6.5"
• Sensitivity: 84.22 dB

• Includes 2 pairs of Subwoofer with amplifier

Hifonics HCM-400.4D with Belva 4 Gauge Amp Kit

400W Peak Colossus Mini Series Class-D 4-Channel Amplifier with Bass Remote

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Hifonics HCM-400.4D with Belva 4 Gauge Amp Kit

400W Peak Colossus Mini Series Class-D 4-Channel Amplifier with Bass Remote

• 4 x 50 @ 4 ohm
• 4 x 100 @ 2 ohm
• Bridged: 2 x 200 @ 4 ohm
• Total Peak Power: 400W
• Class D 2 ohm Stable 4-Channel Amplifier
• Includes Amplifier Wiring Kit

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• 4 x 50 @ 4 ohm
• 4 x 100 @ 2 ohm
• Bridged: 2 x 200 @ 4 ohm
• Total Peak Power: 400W
• Class D 2 ohm Stable 4-Channel Amplifier
• Includes Amplifier Wiring Kit

Hifonics HCM-800.4D with Belva 4 Gauge Amp Kit

800W Peak Colossus Mini Series Class-D 4-Channel Amplifier with Bass Remote

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Hifonics HCM-800.4D with Belva 4 Gauge Amp Kit

800W Peak Colossus Mini Series Class-D 4-Channel Amplifier with Bass Remote

• 4 x 100 @ 4 ohm
• 4 x 200 @ 2 ohm
• Bridged: 2 x 400 @ 4 ohm
• Total Peak Power: 800W
• Class D 2 ohm Stable 4-Channel Amplifier
• Includes Amplifier Wiring Kit

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• 4 x 100 @ 4 ohm
• 4 x 200 @ 2 ohm
• Bridged: 2 x 400 @ 4 ohm
• Total Peak Power: 800W
• Class D 2 ohm Stable 4-Channel Amplifier
• Includes Amplifier Wiring Kit

Infinity Reference 6001A with Belva 8 Gauge Amp Kit

600W RMS Reference Series Class D Monoblock Amplifier with Remote Bass Knob

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Infinity Reference 6001A with Belva 8 Gauge Amp Kit

600W RMS Reference Series Class D Monoblock Amplifier with Remote Bass Knob

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

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

MTX TN1502 with Belva 8 Gauge Amp Kit

150W RMS Class D Terminator Series 2-Channel Full Range Amplifier

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MTX TN1502 with Belva 8 Gauge Amp Kit

150W RMS Class D Terminator Series 2-Channel Full Range Amplifier

• 50 watts x 2 channel + @ 4 ohm
• 75 watts x 2 channel + @ 2 ohm
• Bridged: 150 watts x 1 channel @ 4 ohm + @ 2 ohm
• Total RMS Power: 150 watts
• Class D 2 ohm Stable 2-Channel-Channel Amplifier
• Includes Amplifier Wiring Kit

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Alpine KTP-445A with NVX 8 Gauge Amp Kit

180W RMS Power Pack Series Class D 4-Channel Compact Amplifier

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Alpine KTP-445A with NVX 8 Gauge Amp Kit

180W RMS Power Pack Series Class D 4-Channel Compact Amplifier

• 45 watts x 4 channel @ 4 ohm
• 100 watts x 4 channel @ 2 ohm
• Total RMS Power: 180 watts
• Class D 2 ohm Stable 4-Channel-Channel Amplifier
• Includes Amplifier Wiring Kit

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• 45 watts x 4 channel @ 4 ohm
• 100 watts x 4 channel @ 2 ohm
• Total RMS Power: 180 watts
• Class D 2 ohm Stable 4-Channel-Channel Amplifier
• Includes Amplifier Wiring Kit

Kenwood KAC-D3104 + NVX XFLOC4 Line-Output-Converter + Amp Kit

Class D 4-Channel Amplifier (600 Watts Peak Power) + NVX 4-Channel L.O.C. + 8 Gauge Amp Kit

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Kenwood KAC-D3104 + NVX XFLOC4 Line-Output-Converter + Amp Kit

Class D 4-Channel Amplifier (600 Watts Peak Power) + NVX 4-Channel L.O.C. + 8 Gauge Amp Kit

• 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
• Variable Bass Boost: 0 to +18 dB bass boost at 40 Hz

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Car Amplifier Packages & Bundles

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NVX QB12SPA with Free BAK82BL Amp Kit

NVX QB12SPA with Free BAK82BL Amp Kit

Alpine R2-A60F with 6.5" + 6x9” Coaxial Speakers

Alpine R2-A60F with 6.5" + 6x9” Coaxial Speakers

Pioneer GM-DX975 with Amplifier Wiring Kit

Pioneer GM-DX975 with Amplifier Wiring Kit

Kicker KGMDL7T12 Sub Enclosure + CXA1200.1 Amp w/ Free Amp Install Kit

Kicker KGMDL7T12 Sub Enclosure + CXA1200.1 Amp w/ Free Amp Install Kit

Rockford Fosgate Punch P600X4 with Amplifier Wiring Kit

Rockford Fosgate Punch P600X4 with Amplifier Wiring Kit

Hertz SP 4.500 with NVX 8 Gauge Amp Kit

Hertz SP 4.500 with NVX 8 Gauge Amp Kit

Kicker 52VCVR122 + NVX VADM1 v2 w/ Free Amp Install Kit

Kicker 52VCVR122 + NVX VADM1 v2 w/ Free Amp Install Kit

Kenwood KAC-M5024BT with NVX 8 Gauge Amp Kit

Kenwood KAC-M5024BT with NVX 8 Gauge Amp Kit

Rockford Fosgate Punch PM600X4 + NVX XKIT44

Rockford Fosgate Punch PM600X4 + NVX XKIT44

Kicker 46CXA6605 with Amplifier Wiring Kit

Kicker 46CXA6605 with Amplifier Wiring Kit

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

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

Wet Sounds SDX4 with NVX 4 Gauge Amp Kit

Wet Sounds SDX4 with NVX 4 Gauge Amp Kit

Cerwin Vega CVP800.2D + NVX XLCA2 Line-Output-Converter + Amp Kit

Cerwin Vega CVP800.2D + NVX XLCA2 Line-Output-Converter + Amp Kit

Sundown Audio SW-SACL12D4 + NVX XCA3K

Sundown Audio SW-SACL12D4 + NVX XCA3K

Hifonics HCM-400.4D with Belva 4 Gauge Amp Kit

Hifonics HCM-400.4D with Belva 4 Gauge Amp Kit

Hifonics HCM-800.4D with Belva 4 Gauge Amp Kit

Hifonics HCM-800.4D with Belva 4 Gauge Amp Kit

Infinity Reference 6001A with Belva 8 Gauge Amp Kit

Infinity Reference 6001A with Belva 8 Gauge Amp Kit

MTX TN1502 with Belva 8 Gauge Amp Kit

MTX TN1502 with Belva 8 Gauge Amp Kit

Alpine KTP-445A with NVX 8 Gauge Amp Kit

Alpine KTP-445A with NVX 8 Gauge Amp Kit

Kenwood KAC-D3104 + NVX XFLOC4 Line-Output-Converter + Amp Kit

Kenwood KAC-D3104 + NVX XFLOC4 Line-Output-Converter + Amp Kit

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