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 (83)

500–999.99 watts (137)

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 (19)

500–999.99 watts (41)

1,000–1,999.99 watts (74)

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 (197)

No (124)

Optional (79)

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 (225)

No (73)

Optional (66)

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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Rockford Fosgate Punch P300X2 + NVX Line-Output-Converter + Amp Kit

300W RMS 2-Channel Amplifier + NVX 2-Channel + 8 Gauge Amp Kit

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Rockford Fosgate Punch P300X2 + NVX Line-Output-Converter + Amp Kit

300W RMS 2-Channel Amplifier + NVX 2-Channel + 8 Gauge Amp Kit

• 100W x 2 Chan. @ 4 ohm
• 150W x 2 Chan. @ 2 ohm
• Built In NOMAD "Real Time" Analog Computer
• 2/1 Channel Operation
• 4 Gauge Power and Ground Inputs
• MESHA3 Reduces MOSFET Temperatures for Improved Durability

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Rockford Fosgate R2-500X1 with Amplifier Wiring Kit

500W Peak Prime Series Class-D Monoblock Car Amplifier

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Rockford Fosgate R2-500X1 with Amplifier Wiring Kit

500W Peak Prime Series Class-D Monoblock Car Amplifier

• 300 Watts RMS x 1 @ 4 ohm
• 500 Watts RMS x 1 @ 2 ohm
• CEA-2006 Compliant
• Top Mounted Control Panel
• Class-D Amplifier
• Includes Amplifier Wiring Kit

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• 300 Watts RMS x 1 @ 4 ohm
• 500 Watts RMS x 1 @ 2 ohm
• CEA-2006 Compliant
• Top Mounted Control Panel
• Class-D Amplifier
• Includes Amplifier Wiring Kit

Deaf Bonce Apocalypse 1300.1 Pro with Belva 4 Gauge Amp Kit

1300W RMS Class D Apocalypse Atom Pro Series Monoblock Subwoofer Amplifier with Bass Remote

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Deaf Bonce Apocalypse 1300.1 Pro with Belva 4 Gauge Amp Kit

1300W RMS Class D Apocalypse Atom Pro Series Monoblock Subwoofer Amplifier with Bass Remote

• 490 watts x 1 channel @ 4 ohm
• 780 watts x 1 channel @ 2 ohm
• 1300 watts x 1 channel @ 1 ohm
• Total RMS Power: 1300 watts
• Class D 1 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

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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

• Includes 1 pair of Subwoofer with amplifier

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18-23 Wrangler JL / 20-23 Gladiator JT Kicker Plug & Play 5-Channel Amp & Sub

1000W Peak (500W RMS) Loaded Dual 12" Sealed Truck Enclosure

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18-23 Wrangler JL / 20-23 Gladiator JT Kicker Plug & Play 5-Channel Amp & Sub

1000W Peak (500W RMS) Loaded Dual 12" Sealed Truck Enclosure

• Sealed truck enclosure with 2 12" CompRT Series Subwoofer • 250-500 watts RMS Power Rating • Final Impedance: 2-ohm • Dimensions: 27 1/2" L x 6 1/8" H x 14 5/8" W

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• Sealed truck enclosure with 2 12" CompRT Series Subwoofer • 250-500 watts RMS Power Rating • Final Impedance: 2-ohm • Dimensions: 27 1/2" L x 6 1/8" H x 14 5/8" W

Wet Sounds HTX-2 + 30% Off High Quality NVX Amp Kit

600W RMS 2-Channel HTX Series Class D Full-Range Marine Amplifier (WetSounds)

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Wet Sounds HTX-2 + 30% Off High Quality NVX Amp Kit

600W RMS 2-Channel HTX Series Class D Full-Range Marine Amplifier (WetSounds)

• 150 Watts RMS x 2 @ 4 ohm
• 300 Watts RMS x 2 @ 2 ohm
• 600 Watts RMS x 1 @ 4 ohm, Bridged
• Total Peak Power: 900 Watts RMS
• CEA-2006 Compliant
• Removable crossover/level control cover
• Conformal coated PCB boards
• Mono or 2 channel operation

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Belva BXA5002 with Belva 8 Gauge Amp kit

250W Max Class AB 2-Ohm Stable 2-Channel Amplifier Package

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Belva BXA5002 with Belva 8 Gauge Amp kit

250W Max Class AB 2-Ohm Stable 2-Channel Amplifier Package

• 125 watts x 2 channel @ 4 ohm
• 250 watts x 2 channel @ 2 ohm
• Total Peak Power: 500 watts
• Class A/B 2 ohm Stable 2-Channel-Channel
• Includes Amplifier Wiring Kit

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• 125 watts x 2 channel @ 4 ohm
• 250 watts x 2 channel @ 2 ohm
• Total Peak Power: 500 watts
• Class A/B 2 ohm Stable 2-Channel-Channel
• Includes Amplifier Wiring Kit

Hifonics ZD-1750.5D with Amplifier Wiring Kit

1350W RMS Zeus Delta Series Class-D 5-Channel Car Amplifier

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Hifonics ZD-1750.5D with Amplifier Wiring Kit

1350W RMS Zeus Delta Series Class-D 5-Channel Car Amplifier

• 100 watts x 4 channel + 225 watts x 1 channel @ 4 ohm
• 225 watts x 4 channel + 450 watts x 1 channel @ 2 ohm
• Bridged: 450 watts x 2 channel @ 4 ohm + 450 watts x 1 channel @ 2 ohm
• Total RMS Power: 1350 watts
• Class D 1 ohm Stable 5-Channel Amplifier
• Includes Amplifier Wiring Kit

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Soundstream DPA1.2000D with Amplifier Wiring Kit

400W RMS Reserve Series Class D Monoblock Car Amplifier with Bass Remote

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Soundstream DPA1.2000D with Amplifier Wiring Kit

400W RMS Reserve Series Class D Monoblock Car Amplifier with Bass Remote

• 250 watts x 1 channel @ 4 ohm
• 400 watts x 1 channel @ 2 ohm
• Total RMS Power: 400 watts
• Class D 2 ohm Stable Monoblock Amplifier
• Top-Mounted LCD Panel for Tuning
• Includes Amplifier Wiring Kit

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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

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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-21% $434.99

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

900W Max (300W RMS) 11" Powered Spare Tire Subwoofer Box w/ Remote Bass Knob, 6.5" and 6x9" Coaxial Speakers, Amp Kit, Sound Damping, and Roller

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

900W Max (300W RMS) 11" Powered Spare Tire Subwoofer Box w/ Remote Bass Knob, 6.5" and 6x9" 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 and 6x9 Co-axial Speaker and Damping Kits

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265

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JBL DSP4086 (DSP 4086) + Amp Kit

8-Channel Class D Amplifier Design with Digital Signal Processing + NVX Premium 8 Gauge Amp Wiring Kit

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JBL DSP4086 (DSP 4086) + Amp Kit

8-Channel Class D Amplifier Design with Digital Signal Processing + NVX Premium 8 Gauge Amp Wiring Kit

• 40 Watts RMS x 8 @ 4 ohm
• 60 Watts RMS x 8 @ 2 ohm
• Total Peak Power: 1000 Watts
• CEA-2006 Compliant
• Frequency Response:10Hz to 22kHz

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• 40 Watts RMS x 8 @ 4 ohm
• 60 Watts RMS x 8 @ 2 ohm
• Total Peak Power: 1000 Watts
• CEA-2006 Compliant
• Frequency Response:10Hz to 22kHz

NVX VAD10004 + NVX XFLOC4 Line-Output-Converter + Amp Kit

1000W RMS Class D 4-Channel Amplifier + NVX 4-Channel L.O.C + 4 Gauge Amp Kit

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NVX VAD10004 + NVX XFLOC4 Line-Output-Converter + Amp Kit

1000W RMS Class D 4-Channel Amplifier + NVX 4-Channel L.O.C + 4 Gauge Amp Kit

• RMS: 150 x 4 @ 4 ohm, 250W x 4 @ 2 ohm, Bridged 500W x 2 @ 4 ohm
• Total RMS Power: 1000W
• CEA-2006 Compliant
• Efficient Full Range Class D Design
• Dimensions: 12.1"W x 5.4"D x 2.0H

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• RMS: 150 x 4 @ 4 ohm, 250W x 4 @ 2 ohm, Bridged 500W x 2 @ 4 ohm
• Total RMS Power: 1000W
• CEA-2006 Compliant
• Efficient Full Range Class D Design
• Dimensions: 12.1"W x 5.4"D x 2.0H

Alpine KTA-450 with NVX 8 Gauge Amp Kit

4-Channel 200 Watt RMS Power Pack Amplifier

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Alpine KTA-450 with NVX 8 Gauge Amp Kit

4-Channel 200 Watt RMS Power Pack Amplifier

• Class D 4-channels Power Pack Amplifier
• Power Handling: 50W RMS x 4 @ 4ohm/45W RMS x 4 @ 2ohm
• Dynamic Peak Power (DPP)
• Frequency Response: 15-50 Hz
• CTA-2006 compliant
• Includes Amplifier Wiring Kit

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-32% $319.95

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Kicker 46CXA800.1 with Amp Kit and 3 Year Warranty

800W Peak (600W RMS) CX Series Class-D Monoblock Amplifier with 4 Gauge Amp Kit

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Kicker 46CXA800.1 with Amp Kit and 3 Year Warranty

800W Peak (600W RMS) CX Series Class-D Monoblock Amplifier with 4 Gauge Amp Kit

• 300 Watts RMS x 1 @ 4 ohm
• 600 Watts RMS x 1 @ 2 ohm
• 800 Watts RMS x 1 @ 1 ohm
• Efficient Class-D Monoblock Amplifier
• KickEQ™ 6dB variable bass boost for those additional low frequencies
• FIT+™ (Fail-safe Integration Technology-PLUS) means it works with nearly every radio
• Amplifier wiring kit included

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Rockford Fosgate Punch P400X4 with Amplifier Wiring Kit

400W Punch Series 4-Channel Stereo Class AB Car Power Amplifier (P400X.4)

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Rockford Fosgate Punch P400X4 with Amplifier Wiring Kit

400W Punch Series 4-Channel Stereo Class AB Car Power Amplifier (P400X.4)

• 50 Watts RMS x 4 @ 4 ohm
• 100 Watts RMS x 4 @ 2 ohm
• 200 Watts RMS x 2 @ 4 ohm, Bridged
• 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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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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List price $371.98

-33% $249.98

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Deaf Bonce MFA 4.220 with Belva 4 Gauge Amp Kit

1320W RMS Machete Series Class D 4-Channel Car Amplifier

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Deaf Bonce MFA 4.220 with Belva 4 Gauge Amp Kit

1320W RMS Machete Series Class D 4-Channel Car Amplifier

• 220 watts x 4 channel @ 4 ohm
• 330 watts x 4 channel @ 2 ohm
• Bridged: 660 watts x 2 channel @ 4 ohm
• Total RMS Power: 1320 watts
• Class D 2 ohm Stable 4-Channel Amplifier
• Includes Amplifier Wiring Kit

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List price $369.89

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NVX NDA11005 with Amp Wiring Kit

2200W Peak (1100W RMS) N-Series Class-D 5-Channel Amplifier with NVX 4 Gauge Amplifier Wiring Kit

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NVX NDA11005 with Amp Wiring Kit

2200W Peak (1100W RMS) N-Series Class-D 5-Channel Amplifier with NVX 4 Gauge Amplifier Wiring Kit

• 100 watts x 4 channel + 315 watts x 1 channel @ 4 ohm
• 150 watts x 4 channel + 500 watts x 1 channel @ 2 ohm
• Bridged: 300 watts x 2 channel @ 4 ohm + 500 watts x 1 channel @ 2 ohm
• Total RMS Power: 1100 watts
• Class D 2 ohm Stable 5-Channel-Channel Amplifier

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List price $503.98

-36% $324.98

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Car Amplifier Packages & Bundles for your 2015 X4

Your Vehicle

Product results for your vehicle – confirm details to verify fitment.

Shop the Category

Rockford Fosgate Punch P300X2 + NVX Line-Output-Converter + Amp Kit

Rockford Fosgate Punch P300X2 + NVX Line-Output-Converter + Amp Kit

Rockford Fosgate R2-500X1 with Amplifier Wiring Kit

Rockford Fosgate R2-500X1 with Amplifier Wiring Kit

Deaf Bonce Apocalypse 1300.1 Pro with Belva 4 Gauge Amp Kit

Deaf Bonce Apocalypse 1300.1 Pro with Belva 4 Gauge Amp Kit

Sundown Audio SAV312D4 + NVX XCA3K

Sundown Audio SAV312D4 + NVX XCA3K

18-23 Wrangler JL / 20-23 Gladiator JT Kicker Plug & Play 5-Channel Amp & Sub

18-23 Wrangler JL / 20-23 Gladiator JT Kicker Plug & Play 5-Channel Amp & Sub

Wet Sounds HTX-2 + 30% Off High Quality NVX Amp Kit

Wet Sounds HTX-2 + 30% Off High Quality NVX Amp Kit

Belva BXA5002 with Belva 8 Gauge Amp kit

Belva BXA5002 with Belva 8 Gauge Amp kit

Hifonics ZD-1750.5D with Amplifier Wiring Kit

Hifonics ZD-1750.5D with Amplifier Wiring Kit

Soundstream DPA1.2000D with Amplifier Wiring Kit

Soundstream DPA1.2000D with Amplifier Wiring Kit

JL Audio JD250/1 with Belva 8 Gauge Amp Kit

JL Audio JD250/1 with Belva 8 Gauge Amp Kit

Kenwood KAC-M5024BT with NVX 8 Gauge Amp Kit

Kenwood KAC-M5024BT with NVX 8 Gauge Amp Kit

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

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

JBL DSP4086 (DSP 4086) + Amp Kit

JBL DSP4086 (DSP 4086) + Amp Kit

NVX VAD10004 + NVX XFLOC4 Line-Output-Converter + Amp Kit

NVX VAD10004 + NVX XFLOC4 Line-Output-Converter + Amp Kit

Alpine KTA-450 with NVX 8 Gauge Amp Kit

Alpine KTA-450 with NVX 8 Gauge Amp Kit

Kicker 46CXA800.1 with Amp Kit and 3 Year Warranty

Kicker 46CXA800.1 with Amp Kit and 3 Year Warranty

Rockford Fosgate Punch P400X4 with Amplifier Wiring Kit

Rockford Fosgate Punch P400X4 with Amplifier Wiring Kit

NVX NDA6004 with Amp Wiring Kit

NVX NDA6004 with Amp Wiring Kit

Deaf Bonce MFA 4.220 with Belva 4 Gauge Amp Kit

Deaf Bonce MFA 4.220 with Belva 4 Gauge Amp Kit

NVX NDA11005 with Amp Wiring Kit

NVX NDA11005 with Amp Wiring Kit

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