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2025 BMW M4

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Use our shopping filters to find the right 2/3/4-channel amp to power upgraded speakers properly.

Overview Upgrade your Speakers Add a Subwoofer Add an Amplifier Digital Sound Processors Audio Installation & Accessories Add a Backup Camera Dads & Grads Sale

Amps for Adding Speakers for 2025 BMW M4

Some vehicles require an amp bypass module, a line-output converter like the NVX XLCA2 or AudioControl LC2i, or a DSP to integrate with your factory radio and avoid bass roll-off. Bass roll-off occurs when a factory radio's crossover is designed only for the original equipment speakers, resulting in a not complete signal being sent to your new aftermarket amp.

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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.
Amplifier Key Features
Amplifiers can offer a diverse array of features. If you select more than one feature, then you will view amplifiers that have ALL features selected. These include speaker-level inputs that facilitate seamless integration with factory audio systems, Bluetooth connectivity suitable for ATV/UTV or Classic vehicle setups, built-in DSPs that provide enhanced control over your audio signal, and a host of other functionalities to explore.
Amplifier Class

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.
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.
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.
Series
Many brands group their products into series or lines of products to help customers know the level of quality (good, better, best for example). You can filter by series and the brand using our guided browsing.
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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.
Sonic Certified Amplifier
Sonic Certified amplifiers have been tested by the experts at Sonic Electronix to meet or exceed the wattage ratings provided by the manufacturer. If this is marked as Yes, then you can trust the wattage ratings. If marked as No, then we have tested the amplifier and it did not meet the advertised wattage ratings. If marked as Not Tested, then the Sonic Electronix experts have not yet been able to test the amp.
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.

Amp Bluetooth Connectivity
This feature will tell you if the amplifier has the capability to connect to a Bluetooth device.
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NVX NBA201 with Amplifier Wiring Kit

1400W Peak (700W) RMS N-Series Class A/B 2-Channel Amplifier

NBA201, BAK42BK big
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NVX NBA201 with Amplifier Wiring Kit

1400W Peak (700W) RMS N-Series Class A/B 2-Channel Amplifier

• 200 watts x 2 channel @ 4 ohm
• 350 watts x 2 channel @ 2 ohm
• Bridged: 1400 watts x 1 channel @ 4 ohm
• Total RMS Power: 700 watts
• CEA-2006 Compliant
• Includes Amplifier Wiring Kit

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• 200 watts x 2 channel @ 4 ohm
• 350 watts x 2 channel @ 2 ohm
• Bridged: 1400 watts x 1 channel @ 4 ohm
• Total RMS Power: 700 watts
• CEA-2006 Compliant
• Includes Amplifier Wiring Kit

Limited time!

Infinity DSP6840 (DSP6840AM) (Like New (Open Box))

1000W Peak (480W RMS) Class D DSP Series 8 Channel Car Amplifier with Digital Signal Processing

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Infinity DSP6840 (DSP6840AM) (Like New (Open Box))

1000W Peak (480W RMS) Class D DSP Series 8 Channel Car Amplifier with Digital Signal Processing

• 40 watts x 8 channel @ 4 ohm
• 60 watts x 8 channel @ 2 ohm
• Total RMS Power: 480 watts
• Class D 2 ohm Stable 8-Channel Amplifier

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List price $539.95
-24% $412.21
$370.99 with coupon | Price details

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Crunch GP-1000.2 (Open Box, Great)

1000W Peak Class AB GP Series 2-Channel Full Range Car Amplifier

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Crunch GP-1000.2 (Open Box, Great)

1000W Peak Class AB GP Series 2-Channel Full Range Car Amplifier

• 250 watts x 2 channel @ 4 ohm
• 500 watts x 2 channel @ 2 ohm
• Bridged: 1000 watts x 1 channel @ 4 ohm
• Total Peak Power: 1000 watts
• Class A/B 2 ohm Stable 2-Channel Amplifier

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List price $89.99
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• 250 watts x 2 channel @ 4 ohm
• 500 watts x 2 channel @ 2 ohm
• Bridged: 1000 watts x 1 channel @ 4 ohm
• Total Peak Power: 1000 watts
• Class A/B 2 ohm Stable 2-Channel Amplifier

MB Quart FA2-900.5 with Amplifier Wiring Kit

900W RMS Formula Series Class-D 5-Channel Car Amplifier

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MB Quart FA2-900.5 with Amplifier Wiring Kit

900W RMS Formula Series Class-D 5-Channel Car Amplifier

• 50 watts x 4 channel + 200 watts x 1 channel @ 4 ohm
• 100 watts x 4 channel + 250 watts x 1 channel @ 2 ohm
• Total RMS Power: 900 watts
• Class D 2 ohm Stable 5-Channel Amplifier • Includes Amplifier Wiring Kit

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• 50 watts x 4 channel + 200 watts x 1 channel @ 4 ohm
• 100 watts x 4 channel + 250 watts x 1 channel @ 2 ohm
• Total RMS Power: 900 watts
• Class D 2 ohm Stable 5-Channel Amplifier • Includes Amplifier Wiring Kit

DS18 ION1000.4D with Belva 4 Gauge Amp Kit

3000W Peak (1000W RMS) Class D ION Series 4 Channel Car Amplifier

ION10004D_BAK44 big
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DS18 ION1000.4D with Belva 4 Gauge Amp Kit

3000W Peak (1000W RMS) Class D ION Series 4 Channel Car Amplifier

• 150 watts x 4 channel @ 4 ohm
• 250 watts x 4 channel @ 2 ohm
• Bridged: 500 watts x 2 channel @ 4 ohm
• Total RMS Power: 1000 watts
• Class D 2 ohm Stable 4-Channel-Channel Amplifier
• Includes Amplifier Wiring Kit

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• 150 watts x 4 channel @ 4 ohm
• 250 watts x 4 channel @ 2 ohm
• Bridged: 500 watts x 2 channel @ 4 ohm
• Total RMS Power: 1000 watts
• Class D 2 ohm Stable 4-Channel-Channel Amplifier
• Includes Amplifier Wiring Kit

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Wet Sounds SYN-DX 2 (Like New (Open Box))

750W RMS SYN-DX Series Bridgeable Full Range 2-Channel Class D Marine Amplifier (WetSounds)

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Wet Sounds SYN-DX 2 (Like New (Open Box))

750W RMS SYN-DX Series Bridgeable Full Range 2-Channel Class D Marine Amplifier (WetSounds)

• 200 watts x 2 chan. @ 4 Ohm
• 375 watts x 2 chan. @ 2 Ohm
• 750 watts x 1 chan. @ 4 Ohm
• Total power output: 750 watts RMS
• Variable low-pass filter: 50 - 250 Hz, 12 dB/octave
• Variable high-pass filter: 50 - 250 Hz, 12 dB/octave
• Fuse Rating: 30 A x 3

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-15% $934.99
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Belva BXA5002 (Open Box, Good)

500W Peak BX-Series Class A/B 2-Channel Car Audio Amplifier with Bass Remote

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Belva BXA5002 (Open Box, Good)

500W Peak BX-Series Class A/B 2-Channel Car Audio Amplifier with Bass Remote

• 125 watts x 2 channel @ 4 ohm
• 250 watts x 2 channel @ 2 ohm
• Bridged: 500 watts x 1 channel @ 4 ohm
• Total Peak Power: 500 watts
• Class A/B 2 ohm Stable 2-Channel-Channel

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Cerwin Vega B54 (Like New (Open Box))

1200W Peak (600W RMS) Class D Stealth Bomber Series 4 Channel Car Amplifier

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Cerwin Vega B54 (Like New (Open Box))

1200W Peak (600W RMS) Class D Stealth Bomber Series 4 Channel Car 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

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2026-06-16 09:46:00
Save 30% off an NVX XKIT84 Amp Kit at Checkout! Add a qualifying amplifier to your cart and save 30% on the NVX XKIT84 Amp Kit! No code needed — discount applies automatically at checkout.
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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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• 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

Rockford Fosgate Punch PM300X2 + FREE $75 Gift Card

300W Punch Series Class A/B 2-Channel Marine Amplifier With Gift Card

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Rockford Fosgate Punch PM300X2 + FREE $75 Gift Card

300W Punch Series Class A/B 2-Channel Marine Amplifier With Gift Card

• RMS: 100 watts x 2 chan. @ 4 ohm, 150 watts x 2 chan. @ 2 ohm, 300 watts x 1 chan. @ 4 ohm Bridged
• 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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• RMS: 100 watts x 2 chan. @ 4 ohm, 150 watts x 2 chan. @ 2 ohm, 300 watts x 1 chan. @ 4 ohm Bridged
• 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

Cerwin Vega B54 with Belva 4 Gauge Amp Kit

1200W 4-Channel Bomber Series Class D Amplifier with 4 Gauge Amp Kit

B54, BAK44 big
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Cerwin Vega B54 with Belva 4 Gauge Amp Kit

1200W 4-Channel Bomber Series Class D Amplifier with 4 Gauge Amp Kit

• RMS: 80 Watts x 4 @ 4 ohm, 150 Watts x 4 @ 2 ohm, Bridged: 300 Watts x 2 @ 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 8.70" L x 1.40" H

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• RMS: 80 Watts x 4 @ 4 ohm, 150 Watts x 4 @ 2 ohm, Bridged: 300 Watts x 2 @ 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 8.70" L x 1.40" H

NVX VADM4 Amplifier with Amplifier Wiring Kit

400W RMS 4-Channel Car/Marine/Powersports Amplifier

VADM4, XKIT84 big
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NVX VADM4 Amplifier with Amplifier Wiring Kit

400W RMS 4-Channel Car/Marine/Powersports Amplifier

• 75 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 D 2 ohm Stable 4-Channel-Channel Amplifier

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• 75 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 D 2 ohm Stable 4-Channel-Channel Amplifier

Hifonics ZD-750.4D with Amplifier Wiring Kit

750W RMS Zeus Delta Series Class-D 4-Channel Car Amplifier

ZD-750.4D, BAK44 big
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Hifonics ZD-750.4D with Amplifier Wiring Kit

750W RMS Zeus Delta Series Class-D 4-Channel Car Amplifier

• 100 watts x 4 channel @ 4 ohm
• 175 watts x 4 channel @ 2 ohm
• Bridged: 375 watts x 2 channel @ 4 ohm
• Class D 2 ohm Stable 4-Channel-Channel Amplifier
• Includes Amplifier Wiring Kit

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• 100 watts x 4 channel @ 4 ohm
• 175 watts x 4 channel @ 2 ohm
• Bridged: 375 watts x 2 channel @ 4 ohm
• Class D 2 ohm Stable 4-Channel-Channel Amplifier
• Includes Amplifier Wiring Kit

Infinity Reference 3004A with NVX 8 Gauge Amp Kit

400W RMS Reference Series Class-H 4-Channel Amplifier

REFERENCE3004A_XKIT84 big
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Infinity Reference 3004A with NVX 8 Gauge Amp Kit

400W RMS Reference Series Class-H 4-Channel Amplifier

• 75 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 H 2 ohm Stable 4-Channel Amplifier
• Includes Amplifier Wiring Kit

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• 75 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 H 2 ohm Stable 4-Channel Amplifier
• Includes Amplifier Wiring Kit

Rockford Fosgate M2-300X4 + FREE $75 Gift Card

300 Watt 4-channel marine amplifier

M2-300X4, 75EGIFT big
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Rockford Fosgate M2-300X4 + FREE $75 Gift Card

300 Watt 4-channel marine amplifier

• 50 Watts x 4 @ 4 ohm<
• 75 Watts x 4 @ 2 ohm
• 150 Watts x 2 @ 4 ohm Bridged/Mono
• 4-Channel Marine Amplifier
• Top Mounted Control Panel
• 2/4 channel input switch

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• 50 Watts x 4 @ 4 ohm<
• 75 Watts x 4 @ 2 ohm
• 150 Watts x 2 @ 4 ohm Bridged/Mono
• 4-Channel Marine Amplifier
• Top Mounted Control Panel
• 2/4 channel input switch

Hertz HCP2X with NVX 8 Gauge Amp Kit

800W Class AB 2-Channel Car Subwoofer Amplifier

HCP2X_XKIT82 big
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Hertz HCP2X with NVX 8 Gauge Amp Kit

800W Class AB 2-Channel Car Subwoofer Amplifier

• 65 Watts RMS x 2 @ 4 ohm
• 100 Watts RMS x 2 @ 2 ohm
• CEA-2006 Compliant
• Refined Heatsink with High Convection Capability
• Automatic Remote Turn-On/Off function
• Dimensions: 12.40" x 7.48" x 1.97"
• Includes Amplifier Wiring Kit

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List price $420.99
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• 65 Watts RMS x 2 @ 4 ohm
• 100 Watts RMS x 2 @ 2 ohm
• CEA-2006 Compliant
• Refined Heatsink with High Convection Capability
• Automatic Remote Turn-On/Off function
• Dimensions: 12.40" x 7.48" x 1.97"
• Includes Amplifier Wiring Kit

JL Audio MV1000/5i - Open Box, Great

MVi Series Marine 5-Channel Class-D Amplifier

MV1000/5i big
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JL Audio MV1000/5i - Open Box, Great

MVi Series Marine 5-Channel Class-D Amplifier

• RMS: 75W x 4 + 400W @ 4 ohm / 100W x 4 + 600W @ 2 ohm
• Contains the 2nd-Gen NexD2™ Switching Amplifier Technology
• Latest generation of DirectFET® MOSFET Output Devices
• Cast alloy chassis with marine-grade speaker connections and keyhole mounting design

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-30% $1,084.99

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• RMS: 75W x 4 + 400W @ 4 ohm / 100W x 4 + 600W @ 2 ohm
• Contains the 2nd-Gen NexD2™ Switching Amplifier Technology
• Latest generation of DirectFET® MOSFET Output Devices
• Cast alloy chassis with marine-grade speaker connections and keyhole mounting design

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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39
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-26% $449.99

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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

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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42
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• 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

Cerwin-Vega XED4004D with Belva 4 Gauge Amp Kit

400W Peak (360W RMS) XED Series Class-D 4-Channel Amplifier

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Cerwin-Vega XED4004D with Belva 4 Gauge Amp Kit

400W Peak (360W RMS) XED Series Class-D 4-Channel Amplifier

• 60 watts x 4 channel @ 4 ohm
• 90 watts x 4 channel @ 2 ohm
• Bridged: 170 watts x 2 channel @ 4 ohm
• Total RMS Power: 360 watts
• Class D 2 ohm Stable 4-Channel Amplifier
• Includes Amplifier Wiring Kit

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Universal Icon Universal – fits most vehicles.

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61
List price $283.98
-26% $209.98

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• 60 watts x 4 channel @ 4 ohm
• 90 watts x 4 channel @ 2 ohm
• Bridged: 170 watts x 2 channel @ 4 ohm
• Total RMS Power: 360 watts
• Class D 2 ohm Stable 4-Channel Amplifier
• Includes Amplifier Wiring Kit

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