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  1. Home
  2. Motorcycle & Harley-Davidson Audio
  3. Motorcycle Amplifiers

Motorcycle Amplifiers for your 2004 FLHR Road King close

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Amplifiers ✕
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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.
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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Cerwin Vega SRPM700.2DW

700W RMS Class D Stroker RPM Series 2-Channel Marine Amplifier (White)

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Cerwin Vega SRPM700.2DW

700W RMS Class D Stroker RPM Series 2-Channel Marine Amplifier (White)

• 200 watts x 2 channel @ 4 ohm
• 350 watts x 2 channel @ 2 ohm
• Bridged: 700 watts x 1 channel @ 4 ohm
• Total RMS Power: 750 watts
• Class D 2 ohm Stable 2-Channel Amplifier

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Diamond Audio HXM800.1D

800W RMS Class-D HXM Series Monoblock Marine and Powersports Amplifier

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Diamond Audio HXM800.1D

800W RMS Class-D HXM Series Monoblock Marine and Powersports Amplifier

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

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

Cerwin-Vega HRPM300.2D

300W RMS Class D HRPM Series 2 Channel Marine Amplifier

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Cerwin-Vega HRPM300.2D

300W RMS Class D HRPM Series 2 Channel Marine Amplifier

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

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Diamond Audio HXM1200.1D

1200W RMS Class D Motorsport Series Monoblock Car, Marine and Powersport Amplifier with Bluetooth

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Diamond Audio HXM1200.1D

1200W RMS Class D Motorsport Series Monoblock Car, Marine and Powersport Amplifier with Bluetooth

• 550 watts x 1 channel @ 4 ohm
• 850 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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NVX VADM2 Version 2 (VADM2v2) (Open Box, Great)

600W RMS V-Series Micro Full-Range Class D 2-Channel Amplifier Car/Marine/Powersports Amplifier

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NVX VADM2 Version 2 (VADM2v2) (Open Box, Great)

600W RMS V-Series Micro Full-Range Class D 2-Channel Amplifier Car/Marine/Powersports Amplifier

• 200 watts x 2 channel @ 4 ohm
• 300 watts x 2 channel @ 2 ohm
• Bridged: 600 watts x 1 channel @ 4 ohm
• Total RMS Power: 600 watts
• Class D 2 ohm Stable 2-Channel-Channel Amplifier

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NVX VADM2 Version 2 (VADM2v2) (Open Box, Good)

600W RMS V-Series Micro Full-Range Class D 2-Channel Amplifier Car/Marine/Powersports Amplifier

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NVX VADM2 Version 2 (VADM2v2) (Open Box, Good)

600W RMS V-Series Micro Full-Range Class D 2-Channel Amplifier Car/Marine/Powersports Amplifier

• 200 watts x 2 channel @ 4 ohm
• 300 watts x 2 channel @ 2 ohm
• Bridged: 600 watts x 1 channel @ 4 ohm
• Total RMS Power: 600 watts
• Class D 2 ohm Stable 2-Channel-Channel Amplifier

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• 200 watts x 2 channel @ 4 ohm
• 300 watts x 2 channel @ 2 ohm
• Bridged: 600 watts x 1 channel @ 4 ohm
• Total RMS Power: 600 watts
• Class D 2 ohm Stable 2-Channel-Channel Amplifier

NVX MVPA2 (Like New (Open Box))

600W RMS Marine-V Series 2-Channel Class D Compact Marine/Powersports/Motorcycle Amplifier

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NVX MVPA2 (Like New (Open Box))

600W RMS Marine-V Series 2-Channel Class D Compact Marine/Powersports/Motorcycle Amplifier

• 200 Watts RMS x 2 @ 4 ohm
• 300 Watts RMS x 2 @ 2 ohm
• CEA-2006 Compliant/Preamp Outputs/LPF
• Micro Amplifier
• Weatherproof Amplifier
• 9.7"W x 4.4"L x 1.7"H

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• 200 Watts RMS x 2 @ 4 ohm
• 300 Watts RMS x 2 @ 2 ohm
• CEA-2006 Compliant/Preamp Outputs/LPF
• Micro Amplifier
• Weatherproof Amplifier
• 9.7"W x 4.4"L x 1.7"H

NVX VADM1 (Open Box, Great)

500W RMS Class D Monoblock Car/Marine/Powersports Amplifier with Bass Remote

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NVX VADM1 (Open Box, Great)

500W RMS Class D Monoblock Car/Marine/Powersports Amplifier with Bass Remote

• 500 Watt True RMS Output!
• Marine Certified Monoblock Micro Class D Amplifier
• 180W x 1-Chan. @ 4 ohm
• 320W x 1-Chan. @ 2 ohm
• 500W x 1-Chan. @ 1 ohm
• 3-Way System Protection
• 8 Gauge Power and Ground Inputs
• Extremely Small Footprint

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Wet Sounds STX MICRO-1 (Like New (Open Box))

600W Peak Class D Stealth STX Series Compact Monoblock Marine and Powersports Amplifier

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Wet Sounds STX MICRO-1 (Like New (Open Box))

600W Peak Class D Stealth STX Series Compact Monoblock Marine and Powersports Amplifier

• 250 watts x 1 channel @ 4 ohm
• 420 watts x 1 channel @ 2 ohm
• 600 watts x 1 channel @ 1 ohm
• Total Peak Power: 600 watts
• Class D 1 ohm Stable Monoblock Amplifier

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MTX Audio 2-Channel Power Sports Amplifier with Bluetooth Controller

200W Peak (100W RMS) 2-Channel Ultra-Compact Class D Power Sports Amplifier + Bluetooth Audio Receiver & Volume/Playback Controller Knob

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MTX Audio 2-Channel Power Sports Amplifier with Bluetooth Controller

200W Peak (100W RMS) 2-Channel Ultra-Compact Class D Power Sports Amplifier + Bluetooth Audio Receiver & Volume/Playback Controller Knob

• 25 Watts RMS x 2 @ 4 ohm
• 50 Watts RMS x 2 @ 2 ohm
• Total Peak Power: 200 Watts
• Fixed high-pass filter: 80 Hz
• Frequency Response: 11 - 40,000 Hz
• Speaker-level (high-level) inputs
• Class D Full Range
• iPhone, Android & Bluetooth Device Ready
• One Knob Controls it all – Track, Pause & Volume
• Flush in Dash or Under Dash Mounting options
• Add-on to any Radio or Device with AUX input

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• 25 Watts RMS x 2 @ 4 ohm
• 50 Watts RMS x 2 @ 2 ohm
• Total Peak Power: 200 Watts
• Fixed high-pass filter: 80 Hz
• Frequency Response: 11 - 40,000 Hz
• Speaker-level (high-level) inputs
• Class D Full Range
• iPhone, Android & Bluetooth Device Ready
• One Knob Controls it all – Track, Pause & Volume
• Flush in Dash or Under Dash Mounting options
• Add-on to any Radio or Device with AUX input

JL Audio MX5001 - Open Box, Great

500W RMS Class-D Weatherproof Motorcycle / ATV / SSV / UTV Monoblock Amplifier

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JL Audio MX5001 - Open Box, Great

500W RMS Class-D Weatherproof Motorcycle / ATV / SSV / UTV Monoblock Amplifier

• 300 Watts RMS x 1 @ 4 ohm
• 400 Watts RMS x 1 @ 3 ohm
• 500 Watts RMS x 1 @ 2 ohm
• Total Peak Power: 1000 Watts
• CEA-2006 Compliant/Preamp Outputs/LPF
• Frequency Response: 20 - 12,000 Hz
• Dimensions: 9.33"W x 4.50"D x 1.77"H

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• 300 Watts RMS x 1 @ 4 ohm
• 400 Watts RMS x 1 @ 3 ohm
• 500 Watts RMS x 1 @ 2 ohm
• Total Peak Power: 1000 Watts
• CEA-2006 Compliant/Preamp Outputs/LPF
• Frequency Response: 20 - 12,000 Hz
• Dimensions: 9.33"W x 4.50"D x 1.77"H

MTX MUD502 - Open Box, Great

200W Peak (100W RMS) 2-Channel Ultra-Compact Class D Amplifier

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MTX MUD502 - Open Box, Great

200W Peak (100W RMS) 2-Channel Ultra-Compact Class D Amplifier

• 25 Watts RMS x 2 @ 4 ohm
• 50 Watts RMS x 2 @ 2 ohm
• Total Peak Power: 200 Watts
• Fixed high-pass filter: 80 Hz
• Frequency Response: 11 - 40,000 Hz
• Speaker-level (high-level) inputs
• Class D Full Range

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• 25 Watts RMS x 2 @ 4 ohm
• 50 Watts RMS x 2 @ 2 ohm
• Total Peak Power: 200 Watts
• Fixed high-pass filter: 80 Hz
• Frequency Response: 11 - 40,000 Hz
• Speaker-level (high-level) inputs
• Class D Full Range

MTX MUD1004 - Open Box, Great

800W Peak (400W RMS) 4-Channel Compact Class D Power Sports Amplifier for Install In Car, Off-Road, SSV and more...

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MTX MUD1004 - Open Box, Great

800W Peak (400W RMS) 4-Channel Compact Class D Power Sports Amplifier for Install In Car, Off-Road, SSV and more...

• 50 Watts RMS x 4 @ 4 ohm
• 100 Watts RMS x 4 @ 2 ohm
• Total Peak Power: 800 Watts
• Selectable Front high-pass filter: 80 / 200 Hz
• Speaker-level (high-level) inputs

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• 50 Watts RMS x 4 @ 4 ohm
• 100 Watts RMS x 4 @ 2 ohm
• Total Peak Power: 800 Watts
• Selectable Front high-pass filter: 80 / 200 Hz
• Speaker-level (high-level) inputs

Rockford Fosgate T1000X5ad (Open Box, Great)

1000W RMS Class AD/BD Power Series 5 Channel Car Amplifier

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Rockford Fosgate T1000X5ad (Open Box, Great)

1000W RMS Class AD/BD Power Series 5 Channel Car 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: 1000 watts
• Class AD / BD 2 ohm Stable 5-Channel Amplifier

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• 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: 1000 watts
• Class AD / BD 2 ohm Stable 5-Channel Amplifier

Limited time!

Kenwood KAC-M1814

400W Peak (180W RMS) Class D M Series 4-Channel Car, Marine, Powersports, and Motorcycle Amplifier

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Kenwood KAC-M1814

400W Peak (180W RMS) Class D M Series 4-Channel Car, Marine, Powersports, and Motorcycle Amplifier

• 45 watts x 4 channel @ 4 ohm
• 45 watts x 4 channel @ 2 ohm
• Bridged: 90 watts x 2 channel @ 4 ohm
• Total RMS Power: 180 watts
• Class D 2 ohm Stable 4-Channel Amplifier

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• 45 watts x 4 channel @ 4 ohm
• 45 watts x 4 channel @ 2 ohm
• Bridged: 90 watts x 2 channel @ 4 ohm
• Total RMS Power: 180 watts
• Class D 2 ohm Stable 4-Channel Amplifier

NVX MVPA2

1200W Peak (600W RMS) Class D Marine-V Series 2-Channel Marine/Powersports/Motorcycle Amplifier

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NVX MVPA2

1200W Peak (600W RMS) Class D Marine-V Series 2-Channel Marine/Powersports/Motorcycle Amplifier

• 200 watts x 2 channel @ 4 ohm
• 300 watts x 2 channel @ 2 ohm
• Bridged: 600 watts x 1 channel @ 4 ohm
• Total RMS Power: 600 watts
• Class D 2 ohm Stable 2-Channel Amplifier

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Used from: $191.99 Like New from: $169.99

• 200 watts x 2 channel @ 4 ohm
• 300 watts x 2 channel @ 2 ohm
• Bridged: 600 watts x 1 channel @ 4 ohm
• Total RMS Power: 600 watts
• Class D 2 ohm Stable 2-Channel Amplifier

NVX VADM5 v2 (VADM5v2)

1500W Peak (750W RMS) Class D V-Series 5-Channel Car/Marine/Powersports Amplifier with Bass Remote

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NVX VADM5 v2 (VADM5v2)

1500W Peak (750W RMS) Class D V-Series 5-Channel Car/Marine/Powersports Amplifier with Bass Remote

• 65 watts x 4 channel + 230 watts x 1 channel @ 4 ohm
• 100 watts x 4 channel + 350 watts x 1 channel @ 2 ohm
• Bridged: 200 watts x 2 channel @ 4 ohm + 350 watts x 1 channel @ 2 ohm
• Total RMS Power: 750 watts
• Class D 2 ohm Stable 5-Channel Amplifier

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Save 30% off an NVX XKIT86 Amp Kit at Checkout! Add a qualifying amplifier to your cart and save 30% on the NVX XKIT86 Amp Kit! No code needed — discount applies automatically at checkout.
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• 65 watts x 4 channel + 230 watts x 1 channel @ 4 ohm
• 100 watts x 4 channel + 350 watts x 1 channel @ 2 ohm
• Bridged: 200 watts x 2 channel @ 4 ohm + 350 watts x 1 channel @ 2 ohm
• Total RMS Power: 750 watts
• Class D 2 ohm Stable 5-Channel Amplifier

Diamond Audio MICRO5V2

950W RMS Class D MicroV2 Series Compact 5-Channel Amplifier with Bass Remote and Bluetooth

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Diamond Audio MICRO5V2

950W RMS Class D MicroV2 Series Compact 5-Channel Amplifier with Bass Remote and Bluetooth

• 80 watts x 4 channel + 200 watts x 1 channel @ 4 ohm
• 150 watts x 4 channel + 350 watts x 1 channel @ 2 ohm
• Bridged: 300 watts x 2 channel + 200 watts x 1 channel @ 4 ohm
• Total RMS Power: 950 watts
• Class D 2 ohm Stable 5-Channel-Channel Amplifier

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• 80 watts x 4 channel + 200 watts x 1 channel @ 4 ohm
• 150 watts x 4 channel + 350 watts x 1 channel @ 2 ohm
• Bridged: 300 watts x 2 channel + 200 watts x 1 channel @ 4 ohm
• Total RMS Power: 950 watts
• Class D 2 ohm Stable 5-Channel-Channel Amplifier

MB Quart NA2-400.1

400W Peak Class D Nautic Series Monoblock Marine and Powersports Amplifier

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MB Quart NA2-400.1

400W Peak Class D Nautic Series Monoblock Marine and Powersports Amplifier

• @ 4 ohm
• @ 2 ohm
• Total RMS Power:
• Class D 2 ohm Stable Monoblock Amplifier

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• @ 4 ohm
• @ 2 ohm
• Total RMS Power:
• Class D 2 ohm Stable Monoblock Amplifier

Rockford Fosgate M5-800X4

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

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Rockford Fosgate M5-800X4

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

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• 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

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    FAQ Frequently asked questions in Motorcycle Amplifiers

    Motorcycle Amplifiers Frequently Asked Questions (FAQ)
    A motorcycle amplifier is an electronic device designed to increase the power of audio signals coming from a source, such as a radio, smartphone, or music player. It enhances the audio quality and allows riders to enjoy clearer and more powerful sound while riding their motorcycles.
    Motorcycles can be noisy environments, with wind and engine noise making it difficult to hear audio clearly. A motorcycle amplifier helps overcome this by boosting the audio signals, resulting in better sound quality even at higher speeds. It's particularly beneficial when using speakers or headphones while riding.
    Installing a motorcycle amplifier requires connecting it to a power source, usually the motorcycle's battery, and to the audio source. The amplifier also needs to be connected to speakers or headphones. Installation methods vary based on the amplifier and motorcycle model. It's recommended to follow the manufacturer's instructions or consult a professional if you're not familiar with electrical installations.
    Yes, most motorcycle amplifiers are designed to work with a variety of audio systems, including factory-installed systems and aftermarket setups. However, it's essential to ensure compatibility before purchasing. Check the amplifier's specifications and compatibility with your audio source and speakers.
    Motorcycle amplifiers are designed to draw power from the battery efficiently. Many modern amplifiers have features like auto-turn-off to prevent battery drainage when the motorcycle is not in use. However, it's a good practice to use a properly sized fuse and ensure the amplifier is properly connected to prevent any potential battery issues.
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