The 7 Best 4 CH Marine amps (2023 reviews)

We consider a 4 ch marine amp to be a worthy investment in the long run. We are here to help you choose the right one for your purposes from all the best available products in market today.

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Our Top Picks:

Best Overall: Buy: Skar Audio 4 CH Marine Amp READ REVIEW

Best With Bluetooth: Buy: Kenwood 4 CH Marine Amp READ REVIEW

Best With any car radio: Buy: Pyle 4 CH Marine Amp READ REVIEW

Best With Fusion head unit: Buy: Garmin 4 CH Marine Amp READ REVIEW

Best For Harley: Buy: NVX 4 CH Marine Amp READ REVIEW

Best Sound Quality: Buy: Garmin Nice Amplifier READ REVIEW

Best value For money: Buy: Pyle Power Amplifier READ REVIEW

Best Overall: Skar Audio 4 CH Marine Amp

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If you want nothing short of the best possible amp for your daily usage, this skar audio 4 ch marine amp is certainly a right investment. It's a monoblock class D single channel amplifier. It sounds and performs great. It comes with a bass knob. The amp has a small footprint and stays cool at 3/4 gain. The best part about it is, not only is this amplifier stable at 1 Ohm, but it's also VERY budget-friendly. It will power 3 10in Subwoofers just fine.

The reason it has 2 speaker connections is so you can run more than one subwoofer without having too many wires on one connection. This is a great amp for a starter setup to get a good kick for your buck.

• Fit perfect under passenger seat of a newer jeep wrangler sahara
• Doesn’t warm up & sound quality is awesome
• New and hot release

Best With Bluetooth: Kenwood 4 CH Marine Amp

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The kenwood 4 ch marine amp should be able to handle its purpose and duties with ease. This marine-rated 4-channel amp will pump up your audio system with 45 watts rms per channel. It comes with no wiring and also fits great 13 electra ultra. It cranks while going at just about any speed. It sounds good when not overheating. It’s easy enough to run a separate wire with dedicated power to the amp.

This amp is the perfect size to install on a Harley touring motorcycle, but it fits nicely in the fairing. This is a small unit with a big punch and should fit no problem.

• Great little 400w amp for small spaces
• Sound was clear & easy to hook up
• Amp provides great power and sound
• Great sound in a compact package

Best With any car radio: Pyle 4 CH Marine Amp

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We would, of course, be remiss if we didn't mention pyle 4 ch marine amp for daily purpose. This amp will do well for most applications, especially the water resistant (NOT fully submersible) ones. It features apps on the iphone and takes out the old out dated radio. It has a built-in power protection circuitry and soft turn on/off. The blue wire (not just the red wire) needs power to turn the amp on/off. It does get a little more than warm when in use.

This unit has no AA batteries or USB connection. It allows high quality stereo reproduction from the source. The waterproof case and accessories come in handy as well.

• Works great for a atv/utv and you don't need a headunit
• Sounds great on the ski and was very easy to install
• Delivers what they promise

Best With Fusion head unit: Garmin 4 CH Marine Amp

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The MSS-Da41400 incorporates heat-tempered and conformal Coated pcb's for maximum product life Plus the amplifier chassis is a heat Sink with a high output. This delivers increased power to the connected speakers and/or subwoofers, extending your audio entertainment experience to a whole new level. It has a high efficiency 1400 watt amplifier design which ensures low battery drain with a high output. The amp is loud, sound quality is clear and run cool to the touch.

The amplifier is low battery drain with a high output, making this the perfect amplifier for the marine environment. It is great with fusion head unit. The stainless steel cover conceals the amplifier set up controls and connections for a discrete, attractive look. It is best to keep it in a dry location. RCA line-level inputs allow for easy connection to new or existing systems.

• Thermal/reversed power polarity/dc offset protection/high + low voltage
• Reducing component core temperature and increasing efficiency
• Superior product for the marine conditions
• 1 -piece heavy-duty die cast chassis, 5-way circuitry protection

Best For Harley: NVX 4 CH Marine Amp

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The nvx 4 ch marine amp should be able to handle its purpose and duties with ease. The Marine-V series amps are capable of being installed anywhere and everywhere in your vehicle. This is a decent amplifier because it does sound good and it is small and can fit into places most other amplifiers just cant. It is made for an extremely limited work space.

This amplifier is rated for 50 watts RMS at 14.4 volts per CEA 2006 compliance. It is due to their conformally coated circuit boards and carefully designed sealed aluminum chassis. This means smaller heat shrinks, less power draw from your vehicle’s charging system, and smaller internal components, allowing for a smaller overall footprint. It fits in very small spaces.

• Tiny little amp perfect solution for upgrading factory amp
• Good investment for long term

Best Sound Quality: Garmin Nice Amplifier

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We know from years of feedback from readers, customers and amazon sellers, what most people want in a convenient and appropriate amp. The garmin nice amplifier is exactly that - it's a simple amp that hits all the right notes. The Stereo and the amp don't talk to each other because its all manual ( Knob tuning by hand) sound Good and much better than the stereo the boat comes with. It features built-in variable bass boost, a subsonic filter and variable crossover filters for enhanced performance and system protection. It is working and is nice and loud. It provides added protection from salt air and moisture to ensure maximum product life.

This amp is set up as a 2 zone amp and has speaker outputs for 4 speakers. It cranks crisp clear at any speed. It is very easy to install and Fusion has great tech service if you need help. It is a 2ohm stable amp so just run them in parallel.

• Key features include class-ab amplifier design, conformal coated pcbs and heat sink
• Good investment for long term

Best value For money: Pyle Power Amplifier

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The pyle power amplifier gives the top-tier amp a run for their money by offering flagship specs at a much more affordable price. These 4-channel amps are typically for your mid-range speakers and not subwoofers. It handles 2 x 800 (peak) watt subs with 2 additional midrange speakers. It features a pulse width modulation system. It is used for sending midrange and high frequency information to a particular speaker. It will pound about 10 min, then overheat and go into protection.

This box amp has a small size that makes installation a breeze, so you will have no trouble finding a spot for this little yet powerful device. It comes with standard subwoofer installations where the subwoofer is behind you, the phase should generally be at o. It is easy to connect as well.

• Works great at 500 or so watts rms
• Include power and protection led indicator
• Good brand reputation