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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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Memphis MX600.6

600W RMS MX-Series Class-D 6-Channel Marine/Powersports Amplifier

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Memphis MX600.6

600W RMS MX-Series Class-D 6-Channel Marine/Powersports Amplifier

• 50 watts x 4 channel 100 watts x 2 channel @ 4 ohm
• 75 watts x 4 channel 150 watts x 2 channel @ 2 ohm
• Bridged: 150 watts x 2 channel 300 watts x 1 channel @ 4 ohm
• Total RMS Power: 600 watts
• Class D 2 ohm Stable 6-Channel Amplifier

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• 50 watts x 4 channel 100 watts x 2 channel @ 4 ohm
• 75 watts x 4 channel 150 watts x 2 channel @ 2 ohm
• Bridged: 150 watts x 2 channel 300 watts x 1 channel @ 4 ohm
• Total RMS Power: 600 watts
• Class D 2 ohm Stable 6-Channel Amplifier

Kicker PXA300.1 (48PXA3001)

500W Peak (300W RMS) Class D PXA Series Monoblock Marine and Powersports Amplifier

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Kicker PXA300.1 (48PXA3001)

500W Peak (300W RMS) Class D PXA Series Monoblock Marine and Powersports Amplifier

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

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Memphis MM500.4V

500W RMS Class D MM Series 4-Channel Marine Amplifier

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Memphis MM500.4V

500W RMS Class D MM Series 4-Channel Marine Amplifier

• 80 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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• 80 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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Cerwin-Vega SRPM750.1D

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

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Cerwin-Vega SRPM750.1D

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

• 300 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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MB Quart NA3-750.1

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

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MB Quart NA3-750.1

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

• 300 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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• 300 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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Hertz HCP 2MX

Class AB 2 Ohms 2 Channel Marine Stereo Amplifier

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Hertz HCP 2MX

Class AB 2 Ohms 2 Channel Marine Stereo Amplifier

• 120 Watts RMS x 2 @ 4 ohm
• 200 Watts RMS x 2 @ 2 ohm
• 400 Watts RMS x 1 @ 1 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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• 120 Watts RMS x 2 @ 4 ohm
• 200 Watts RMS x 2 @ 2 ohm
• 400 Watts RMS x 1 @ 1 ohm
• CEA-2006 Compliant/Preamp Outputs/LPF
• Corrosion Protection
• Water jet tested
• Dimensions: 12.40" x 7.48" x 1.97"

Sound Extreme SEI-AMPEV30041

300W RMS Class D EV Series 4 Channel Marine Amplifier

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Sound Extreme SEI-AMPEV30041

300W RMS Class D EV Series 4 Channel Marine Amplifier

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

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

Sound Extreme by ECOXGEAR SEI-AMP30041

300W RMS Class-D 4-Channel High Definition Marine Amplifier

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Sound Extreme by ECOXGEAR SEI-AMP30041

300W RMS Class-D 4-Channel High Definition Marine Amplifier

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

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

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Massive Audio T3

1400 Watts 1 RMS @ 1 Ohm Monoblock Marine Amplifier

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Massive Audio T3

1400 Watts 1 RMS @ 1 Ohm Monoblock Marine Amplifier

• 450 Watts RMS x 1 @ 4 ohm
• 700 Watts RMS x 1 @ 2 ohm
• 1400 Watts RMS x 1 @ 1 ohm
• Total Peak Power: 2800 Watts
• CEA-2006 Compliant/Preamp Outputs/LPF
• 4.25 "W 11.50 "L 1.6 "H

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Precision Power (PPI) MPA1200.1D

1200W RMS Class D ATOM Series Monoblock Water-Resistant Amplifier with Bass Knob

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Precision Power (PPI) MPA1200.1D

1200W RMS Class D ATOM Series Monoblock Water-Resistant Amplifier with Bass Knob

• 400 watts x 1 channel @ 4 ohm
• 700 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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• 400 watts x 1 channel @ 4 ohm
• 700 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

Soundstream SM1.700D

700W Peak Monoblock Stealth Series Marine Grade Class D Amplifier

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Soundstream SM1.700D

700W Peak Monoblock Stealth Series Marine Grade Class D Amplifier

• RMS: 250 Watts x 1 @ 4 ohm
• 350 Watts x 1 @ 2 ohm
• Total Peak Power: 700 Watts
• MOSFET Power Supply w/ Audiophile Grade IRTM Transistors
• Military Grade SMT PCB Maintains Dynamic Performance
• Hybrid Aluminum Alloy Heatsink for Optimum Dissipation
• Dash Mount Gain Control Module Included

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• RMS: 250 Watts x 1 @ 4 ohm
• 350 Watts x 1 @ 2 ohm
• Total Peak Power: 700 Watts
• MOSFET Power Supply w/ Audiophile Grade IRTM Transistors
• Military Grade SMT PCB Maintains Dynamic Performance
• Hybrid Aluminum Alloy Heatsink for Optimum Dissipation
• Dash Mount Gain Control Module Included

JBL Apex PA1502

750W Peak (300W RMS) Class D Apex Series Compact 2-Channel Marine and Powersports Amplifier

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JBL Apex PA1502

750W Peak (300W RMS) Class D Apex Series Compact 2-Channel Marine and Powersports 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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• 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

Wet Sounds Sinister-SDX4

1370W RMS Class D Sinister Series 4-Channel Marine Amplifier with Bass Remote

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Wet Sounds Sinister-SDX4

1370W RMS Class D Sinister Series 4-Channel Marine Amplifier with Bass Remote

• 185 watts x 4 channel @ 4 ohm
• 340 watts x 4 channel @ 2 ohm
• Bridged: 685 watts x 2 channel @ 4 ohm
• Total RMS Power: 1370 watts
• Class D 2 ohm Stable 4-Channel Marine Amplifier

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• 185 watts x 4 channel @ 4 ohm
• 340 watts x 4 channel @ 2 ohm
• Bridged: 685 watts x 2 channel @ 4 ohm
• Total RMS Power: 1370 watts
• Class D 2 ohm Stable 4-Channel Marine Amplifier

Lowest price in 30 days

Massive Audio TX2

480W RMS Class D TRIDENT Series 2 Channel Marine Amplifier with Bluetooth

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Massive Audio TX2

480W RMS Class D TRIDENT Series 2 Channel Marine Amplifier with Bluetooth

• 120 watts x 2 channel @ 4 ohm
• 240 watts x 2 channel @ 2 ohm
• Bridged: 480 watts x 1 channel @ 4 ohm
• Total RMS Power: 480 watts
• Class D 2 ohm Stable 2-Channel Amplifier

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• 120 watts x 2 channel @ 4 ohm
• 240 watts x 2 channel @ 2 ohm
• Bridged: 480 watts x 1 channel @ 4 ohm
• Total RMS Power: 480 watts
• Class D 2 ohm Stable 2-Channel Amplifier

Sound Extreme SEI-AMPEV30011

300W RMS Class D EV Series Monoblock Marine Amplifier

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Sound Extreme SEI-AMPEV30011

300W RMS Class D EV Series Monoblock Marine Amplifier

• 300 watts x 1 channel @ 4 ohm
• Total RMS Power: 300 watts
• Class D 4 ohm Stable Monoblock Amplifier
• Operating Voltage: 43V to 82V
• Marine-grade sealed die-cast aluminum chassis

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• 300 watts x 1 channel @ 4 ohm
• Total RMS Power: 300 watts
• Class D 4 ohm Stable Monoblock Amplifier
• Operating Voltage: 43V to 82V
• Marine-grade sealed die-cast aluminum chassis

JL Audio MV400/4i

400W RMS Class D MVi Series 4 Channel Marine Amplifier

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JL Audio MV400/4i

400W RMS Class D MVi Series 4 Channel 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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Rockford Fosgate Marine PM400X4

400W RMS Punch Series Class-AB 4-Channel Marine Amplifier

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Rockford Fosgate Marine PM400X4

400W RMS Punch Series Class-AB 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 A/B 2 ohm Stable 4-Channel-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 A/B 2 ohm Stable 4-Channel-Channel Amplifier

Kenwood KAC-M8005

800W RMS Class D M Series 5-Channel Marine Amplifier

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Kenwood KAC-M8005

800W RMS Class D M Series 5-Channel Marine Amplifier

• 50 watts x 4 channel + 300 watts x 1 channel @ 4 ohm
• 75 watts x 4 channel + 500 watts x 1 channel @ 2 ohm
• Bridged: 150 watts x 2 channel @ 4 ohm + 500 watts x 1 channel @ 2 ohm
• Total RMS Power: 800 watts
• Class D 2 ohm Stable 5-Channel Amplifier

FREE Amp Kit at Checkout!
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• 50 watts x 4 channel + 300 watts x 1 channel @ 4 ohm
• 75 watts x 4 channel + 500 watts x 1 channel @ 2 ohm
• Bridged: 150 watts x 2 channel @ 4 ohm + 500 watts x 1 channel @ 2 ohm
• Total RMS Power: 800 watts
• Class D 2 ohm Stable 5-Channel Amplifier

Soundstream MR4.1400D

1400 W Peak (700W RMS) Class D 4-Channel Marine Amplifier

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Soundstream MR4.1400D

1400 W Peak (700W RMS) Class D 4-Channel Marine Amplifier

• 125 Watts RMS x 4 @ 4 ohm
• 175 Watts RMS x 4 @ 2 ohm
• Bridged: 350 watts x 2 chan @ 4 ohm
• Total Peak Power: 1400 Watts
• Variable Bass Boost: 0 to +12 dB bass boost
• 3-way protection circuitry (thermal, overload, and speaker short protection)
• Heavy duty aluminum alloy heat-sink for extreme heat dissipation

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• 125 Watts RMS x 4 @ 4 ohm
• 175 Watts RMS x 4 @ 2 ohm
• Bridged: 350 watts x 2 chan @ 4 ohm
• Total Peak Power: 1400 Watts
• Variable Bass Boost: 0 to +12 dB bass boost
• 3-way protection circuitry (thermal, overload, and speaker short protection)
• Heavy duty aluminum alloy heat-sink for extreme heat dissipation

Fusion SG-DA41400

1400W Peak (880W RMS) Signature Series Class-D 4-channel Marine Amplifier

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Fusion SG-DA41400

1400W Peak (880W RMS) Signature Series Class-D 4-channel Marine Amplifier

• 150 watts x 4 channel @ 4 ohm
• 220 watts x 4 channel @ 2 ohm
• Bridged: 440 watts x 2 channel @ 4 ohm
• Total RMS Power: 880 watts
• Class D 2 ohm Stable 4-Channel Amplifier

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• 150 watts x 4 channel @ 4 ohm
• 220 watts x 4 channel @ 2 ohm
• Bridged: 440 watts x 2 channel @ 4 ohm
• Total RMS Power: 880 watts
• Class D 2 ohm Stable 4-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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