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  1. Home
  2. Marine Audio & Electronics
  3. Marine Amplifiers for Boats

Marine Amplifiers for Boats

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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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JL Audio XDM400/4

400W RMS Class D XDM Series 4 Channel Car and Marine Amplifier

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JL Audio XDM400/4

400W RMS Class D XDM Series 4 Channel Car and Marine 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 Amplifier

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Alpine KTA-30MW Tough Power Pack

600W Peak (300W RMS) Class D Power Pack Series Monoblock Marine and Powersports Amplifier

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Alpine KTA-30MW Tough Power Pack

600W Peak (300W RMS) Class D Power Pack Series Monoblock Marine and Powersports Amplifier

• 300 watts x 1 channel @ 4 ohm
• 300 watts x 1 channel @ 2 ohm
• Total RMS Power: 300 watts
• Class D 2 ohm Stable Monoblock Amplifier

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MTX MUD100-4

800W Peak (400W RMS) Class D MUD Series 4 Channel Marine and Powersports Amplifier

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MTX MUD100-4

800W Peak (400W RMS) Class D MUD Series 4 Channel Marine and Powersports Amplifier

• 50 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 Amplifier

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Kenwood KAC-M5001

600W Peak (300W RMS) Class D M Series Monoblock Marine and Powersports Amplifier with Bass Remote

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Kenwood KAC-M5001

600W Peak (300W RMS) Class D M Series Monoblock Marine and Powersports Amplifier with Bass Remote

• 200 watts x 1 channel @ 4 ohm
• 300 watts x 1 channel @ 2 ohm
• Total RMS Power: 300 watts
• Class D 2 ohm Stable Monoblock Amplifier

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• 200 watts x 1 channel @ 4 ohm
• 300 watts x 1 channel @ 2 ohm
• Total RMS Power: 300 watts
• Class D 2 ohm Stable Monoblock Amplifier

Rockford Fosgate Punch Marine PM100X1K

300W Peak (100W RMS) Punch Series BTL Monoblock Marine Amplifiers (Pair)

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Rockford Fosgate Punch Marine PM100X1K

300W Peak (100W RMS) Punch Series BTL Monoblock Marine Amplifiers (Pair)

• 60 watts x 1 channel @ 4 ohm
• 100 watts x 1 channel @ 2 ohm
• Total RMS Power: 100 watts
• Class 2 ohm Stable Monoblock Amplifier

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• 60 watts x 1 channel @ 4 ohm
• 100 watts x 1 channel @ 2 ohm
• Total RMS Power: 100 watts
• Class 2 ohm Stable Monoblock Amplifier

JBL APEX PA1254

1250W Peak (500W RMS) Class D Apex Series Compact 4-Channel Marine and Powersports Amplifier

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JBL APEX PA1254

1250W Peak (500W RMS) Class D Apex Series Compact 4-Channel Marine and Powersports Amplifier

• 75 watts x 4 channel @ 4 ohm
• 125 watts x 4 channel @ 2 ohm
• Bridged: 250 watts x 2 channel @ 4 ohm
• Total RMS Power: 500 watts
• Class D 2 ohm Stable 4-Channel Amplifier

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• 75 watts x 4 channel @ 4 ohm
• 125 watts x 4 channel @ 2 ohm
• Bridged: 250 watts x 2 channel @ 4 ohm
• Total RMS Power: 500 watts
• Class D 2 ohm Stable 4-Channel Amplifier

Kenwood eXcelon XM302-4

600W Peak (300W RMS) Class D eXcelon Motorsport Series 4-Channel Marine and Powersports Amplifier (Hi-Res Audio Certified)

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Kenwood eXcelon XM302-4

600W Peak (300W RMS) Class D eXcelon Motorsport Series 4-Channel Marine and Powersports Amplifier (Hi-Res Audio Certified)

• 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

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MTX MA750.1

750W RMS Class D MA Series Monoblock Marine Amplifier with Bass Remote

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MTX MA750.1

750W RMS Class D MA Series Monoblock Marine Amplifier with Bass Remote

• 250 watts x 1 channel @ 4 ohm
• 500 watts x 1 channel @ 2 ohm
• 750 watts x 1 channel @ 1 ohm
• Total RMS Power: 750 watts
• Class D 1 ohm Stable Monoblock Amplifier

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• 250 watts x 1 channel @ 4 ohm
• 500 watts x 1 channel @ 2 ohm
• 750 watts x 1 channel @ 1 ohm
• Total RMS Power: 750 watts
• Class D 1 ohm Stable Monoblock Amplifier

JL Audio XDM500/3

500W RMS Class D XDM Series 3 Channel Car and Marine Amplifier

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JL Audio XDM500/3

500W RMS Class D XDM Series 3 Channel Car and Marine Amplifier

• 75 watts x 2 channel + 180 watts x 1 channel @ 4 ohm
• 100 watts x 2 channel + 300 watts x 1 channel @ 2 ohm
• Bridged: 200 watts x 1 channel @ 4 ohm + 300 watts x 1 channel @ 2 ohm
• Total RMS Power: 500 watts
• Class D 2 ohm Stable 3-Channel Amplifier

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JL Audio MX300/1

300W RMS Class D MX Series Monoblock Marine and Powersports Amplifier

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JL Audio MX300/1

300W RMS Class D MX Series Monoblock Marine and Powersports Amplifier

• 160 watts x 1 channel @ 4 ohm
• 300 watts x 1 channel @ 2 ohm
• Total RMS Power: 300 watts
• Class D 2 ohm Stable Monoblock Amplifier

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Wet Sounds HTM-6

900W RMS Class D HTM Series 6 Channel Marine Amplifier with LED Backlit Badge

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Wet Sounds HTM-6

900W RMS Class D HTM Series 6 Channel Marine Amplifier with LED Backlit Badge

• 85 watts x 6 channel @ 4 ohm
• 150 watts x 6 channel @ 2 ohm
• Bridged: 300 watts x 3 channel @ 4 ohm
• Total RMS Power: 900 watts
• Class D 2 ohm Stable 6-Channel Marine Amplifier

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• 85 watts x 6 channel @ 4 ohm
• 150 watts x 6 channel @ 2 ohm
• Bridged: 300 watts x 3 channel @ 4 ohm
• Total RMS Power: 900 watts
• Class D 2 ohm Stable 6-Channel Marine Amplifier

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AudioControl ACX-300.2

300W RMS Class D ACX Series 2-Channel Marine and Powersports Amplifier

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AudioControl ACX-300.2

300W RMS Class D ACX Series 2-Channel Marine and Powersports Amplifier

• 75 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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• 75 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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Stinger SPX700X4

700W RMS Class D SPX Series 4 Channel Marine and Powersports Amplifier

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Stinger SPX700X4

700W RMS Class D SPX Series 4 Channel Marine and Powersports Amplifier

• 125 watts x 4 channel @ 4 ohm
• 175 watts x 4 channel @ 2 ohm
• Bridged: 125 watts x 2 channel @ 4 ohm
• Total RMS Power: 700 watts
• Class D 2 ohm Stable 4-Channel Amplifier

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Rockford Fosgate Punch Marine PM600X4

600W RMS Class AB Punch Series 4 Channel Marine Amplifier

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Rockford Fosgate Punch Marine PM600X4

600W RMS Class AB Punch Series 4 Channel Marine Amplifier

• 75 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 A/B 2 ohm Stable 4-Channel Amplifier

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JL Audio XDM1000/5

1000W RMS Class D XDM Series 5 Channel Car and Marine Amplifier

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JL Audio XDM1000/5

1000W RMS Class D XDM Series 5 Channel Car and Marine Amplifier

• 75 watts x 4 channel + 400 watts x 1 channel @ 4 ohm
• 100 watts x 4 channel + 600 watts x 1 channel @ 2 ohm
• Bridged: 200 watts x 2 channel @ 4 ohm + 600 watts x 1 channel @ 2 ohm
• Total RMS Power: 1000 watts
• Class D 2 ohm Stable 5-Channel Amplifier

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Kicker KXMA500.4 (48KXMA5004)

700W Peak (500W RMS) Class D KXM Series 4-Channel Marine Amplifier

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Kicker KXMA500.4 (48KXMA5004)

700W Peak (500W RMS) Class D KXM Series 4-Channel Marine Amplifier

• 75 watts x 4 channel @ 4 ohm
• 125 watts x 4 channel @ 2 ohm
• Bridged: 250 watts x 2 channel @ 4 ohm
• Total RMS Power: 500 watts
• Class D 2 ohm Stable 4-Channel Amplifier

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MTX MA400.4

400W RMS Class D MA Series 4-Channel Marine Amplifier

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MTX MA400.4

400W RMS Class D MA Series 4-Channel Marine Amplifier

• 50 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 Amplifier

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• 50 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 Amplifier

Rockford Fosgate M2-500X1

500W RMS M2 Series Monoblock Marine Amplifier with Remote Bass Knob

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Rockford Fosgate M2-500X1

500W RMS M2 Series Monoblock Marine Amplifier with Remote Bass Knob

• 300 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

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• 300 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

Hertz HCP 4M

760W RMS HCP Series Full-Range Class D 4 2-Channel Marine Amplifier

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Hertz HCP 4M

760W RMS HCP Series Full-Range Class D 4 2-Channel Marine Amplifier

• 65 Watts RMS x 4 @ 4 ohm
• 95 Watts RMS x 4 @ 2 ohm
• CEA-2006 Compliant/Preamp Outputs/LPF
• Corrosion Protection
• Water jet tested
• Dimensions: 12.40" x 7.48" x 1.97"

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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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    FAQ Frequently asked questions in Marine Amplifiers for Boats

    Marine Amplifiers Frequently Asked Questions (FAQ)
    Marine amplifiers are specifically designed and engineered to withstand the harsh marine environment. Unlike regular car amplifiers, marine amps are built with corrosion-resistant materials, sealed circuit boards, and weatherproof coatings to protect against moisture, saltwater, and UV rays. They undergo rigorous testing to ensure they can handle the challenges of marine use. These amplifiers are essential for boats as they provide high-quality sound while enduring exposure to water and other elements. When shopping for marine amplifiers, always look for products labeled as ""marine-grade"" or ""water-resistant"" to guarantee optimal performance and longevity in marine conditions.
    It is not recommended to use a regular car amplifier in a boat. Marine environments present unique challenges such as water splashes, humidity, and salt exposure, which can damage standard car amplifiers designed for dry, land-based use. Regular amplifiers lack the necessary protective features to withstand these conditions. Using a non-marine amplifier in a boat may lead to corrosion, malfunction, and ultimately, failure of the unit. To ensure reliable and safe performance, investing in a marine-specific amplifier is crucial. Marine amplifiers are engineered with water and corrosion-resistant components, ensuring they can withstand the demanding marine environment without compromising audio quality.
    The power rating you need for your marine amplifier depends on the speakers and subwoofers in your boat and your desired audio output. To determine the appropriate power rating, consider the RMS (root mean square) wattage of your speakers and subwoofers. Match the amplifier's RMS output to the RMS rating of your speakers and subwoofers for optimal performance. It's essential to avoid underpowering or overpowering your speakers, as both scenarios can lead to audio distortion or damage to the speakers. Additionally, consider the number of channels required, especially if you plan to power separate speakers and a subwoofer. Sonic Electronix offers a wide selection of marine amplifiers with varying power ratings and channel configurations to meet your boat's specific audio needs.
    While some experienced boat owners with a good understanding of electrical systems may be able to install a marine amplifier themselves, it's recommended to seek professional help to ensure a proper and safe installation. Marine amplifier installation requires knowledge of both marine electrical systems and audio connections. Professional installers understand the unique challenges of marine installations and can ensure all connections are securely waterproofed and properly sealed. They also have the expertise to optimize the amplifier's performance and safeguard your boat's electrical system. If you're unsure about the installation process or lack experience with marine electronics, it's best to have a certified marine audio installer handle the job.
    To protect your marine amplifier from water damage and corrosion, consider the following precautions: Install the amplifier in a dry, well-ventilated location away from direct exposure to water. Use marine-grade wiring and connectors to ensure proper waterproofing of all connections. Apply silicone or marine-grade sealant to all openings and gaps in the amplifier's housing. Utilize a marine amplifier cover when the boat is not in use to protect the unit from rain and splashes. Regularly inspect and clean the amplifier's exterior to remove any salt, dirt, or debris that may cause corrosion. Consider investing in a marine-grade amplifier with a protective coating and sealed circuitry to enhance durability. By following these precautions, you can extend the lifespan of your marine amplifier and enjoy superior audio performance on your boat for years to come.
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    Modern vehicles often require specific brackets, wiring harnesses, and mounting solutions. A fit guide ensures:

    • You see only parts engineered for your exact vehicle
    • You avoid incompatible radios, speakers, or wiring
    • Installation is smoother, faster, and frustration-free
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    Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.

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