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Best 4-Channel Amp for Harley-Davidson (Reviews)

Nothing makes a motorcycle sound as awesome as an amplifier. 

Best 4-Channel Amp for Harley-Davidson

If you’re thinking about getting the best 4 channel Amp for Harley-Davidson, you need to know the different types available along with the different prices. There are some inexpensive amps that you can buy that won’t have as much power as a more expensive one.

However, all amps are not created equally. Some amps will give you a wonderful sound, but may not work perfectly with your Harley.

Some people want more power and better reliability. Others want something that will allow them to travel longer distances. Regardless of the reason, it’s important to choose the right type of amplifier for your harley davidson.

To save your time and efforts our team did a research to pick the top eight of the Best 4 channel Amp for your Harley-Davidson.

So, without further ado let’s find out the best amplifier for your dream bike.

1. Rockford Fosgate R2 (4-Channel Amplifier)

Rockford Fosgate R2 500X4 review 1

The 1st Best 4-Channel Amp for Harley-Davidson in our list is the Rockford Fosgate R2 series.

The Rockford Fosgate R2 series is a full-range class-D 4-channel amplifier that delivers power and bass on demand. With 500 Watts of RMS power, this amp can handle any sound you throw at it. 

Class D technology makes the R2-500X4 extremely efficient, while the C.L.E.A.N circuitry helps you adjust your gain settings easily. The P.O.W.E.R Supply generates more power as voltage increases, and the integrated Punch EQ corrects for acoustic deficiencies – giving you up to 3X bass!

Rockford Fosgate amp

These amps were designed specifically for audio fanatics, and they deliver everything you’d expect from a Rockford Fosgate product – plus more. Plus, because they’re so easy to set up and configure, they’re perfect for use with factory audio or custom aftermarket systems. 

This 4-channel amplifier is perfect for anyone looking to beef up their factory audio system or add some power to a custom aftermarket setup. Plus, with its simple setup and configuration, it’s perfect for beginners and experts alike. So what are you waiting for? Add the Rockford Fosgate Prime R2-500X4 to your shopping cart today!

2. Kenwood KAC-M1814

Kenwood KAC-M1814 review

The Second Best 4-Channel Amp for Harley-Davidson in our list is the Kenwood KAC-M1814 .

Bring your music to life with the Kenwood KAC-M1814 4-channel amplifier! This powerful amp provides 45 watts RMS per channel, more than doubling the power of most Harley stereos

The KAC-M1814 is also marine rated, featuring plastic covers to protect its connections and a conformal-coated circuit board that keeps out moisture and salt. Whether you’re on land or water, this amp will pump up your audio system and keep the party going!

 This quality amplifier is designed to improve sound quality, with pre-amp and power-amp sections separated to reduce radiation noise. Plus, the plastic-covered connector helps keep out water and dust, while conformal coating provides vibration resistance. Installation is a breeze – just plug it in and you’re good to go!

So whether you’re riding down the street or cruising on the open road, you’ll enjoy crystal-clear sound with this Kenwood amplifier!

3. Rockford Fosgate PBR300X4 (4 Channel Amplifier)

Rockford Fosgate PBR300X4  review

The 3rd Best 4-Channel Amp for Harley-Davidson in our list is the Rockford Fosgate PBR300X4 .

The Rockford Fosgate PBR300X4 amplifier is perfect for smaller installations, motorcycles, and recreational vehicles. This full-range 4-channel amp packs a Punch with 300 Watts of power without sucking a lot of juice from your electrical system. 

Featuring our Class BR, Rockford Fosgate’s patented Boosted Rail technology that sips current while retaining a storage reserve for extended bursts of power, the PBR300X4 is ultra-compact and efficient.

This amazing amplifier can accept both speaker level and RCA level signal types, making it perfect for a variety of installations. 

Whether you’re looking to upgrade your OEM system or add some power to your aftermarket setup, the PBR300X4 is up for the task. So give your ride the boost it deserves with the Punch 300 watt 4 channel boosted rail amplifier from Rockford Fosgate.

4. Kenwood KAC-M1804 Compact 4-Channel Amplifier

Kenwood KAC-M1804 review

The 4th Best 4-Channel Amp for Harley-Davidson in our list is the Kenwood KAC-M1804.

The Kenwood KAC-M1804 Compact 4-Channel Amplifier is perfect for anyone who wants an amplifier that is both powerful and compact. This amplifier has 45 watts RMS per channel, making it one of the most powerful compact amplifiers on the market. Additionally, its extruded aluminum heat sink design and conformal coated circuit board makes it perfect for marine applications.

This powerful little amp uses plastic covers to protect its connections from moisture and salt, while a conformal coated circuit board keeps it running smoothly even in damp environments.

Plus, with RCA inputs and speaker-level inputs, it’s compatible with almost any system. The KAC-M1804 also features an automatic on function – so you don’t need to worry about installing a separate remote turn-on wire. And last but not least, it’s non-bridgeable and 4 ohm stable per channel, making it perfect for any occasion.

So if you’re looking for an app that can handle any kind of driving situation, the KAC-M1804 is worth checking out.

5. Kenwood KAC-M3004 Compact 4 Channel Digital Amplifier

 Kenwood KAC-M3004 review

The 4th Best 4-Channel Amp for Harley-Davidson in our list is the Kenwood KAC-M3004.

Kenwood’s KAC-M3004 digital amplifier is a powerful little powerhouse that will add some serious sound to your vehicle. With 50 watts of RMS power per channel, this amp can handle anything from long road trips to weekend getaways off the beaten path. 

It’s also incredibly compact and fits just about anywhere, making it perfect for installation on boats, motorcycles, or ATVs. And if you’re looking to power a couple of subs, no problem – the KAC-M3004 can be bridged to 2-channel mode and send 150 watts to each one. Crank up the tunes with Kenwood!

The Kenwood KAC-M3004 amplifier is perfect for anyone looking to add some serious power to their car stereo system. This amp has plenty of juice to push your sound waves, making it a great choice for anyone who wants to boost their music’s volume and clarity. Thanks to its high-level inputs, the KAC-M3004 is easy to install, even if you’re not a car audio expert.

The KAC-M3004 features a conformal coating on the circuit board to protect it from moisture, making it ideal for use in any weather condition. 

Plus, with 50 watts RMS x 4 channels at 4 ohms or 75 watts RMS x 4 at 2 ohms, this amp will deliver powerful sound and clarity in any situation.

This amplifier is designed to give you the power and control you need for a great sound. The screw terminals make it easy to connect your power, ground, and power control wires. And if you’re using speaker level inputs, the Power Control wire can be connected to the head unit’s remote turn-on lead. There are also two pairs of RCA inputs for connecting stereo RCA patch cables from the head unit to the amp.

6. Soundstream (4-Channel Class D Amplifier)

 Soundstream amplifier

This Class D amplifier is designed to be compact and powerful, making it the perfect choice for any vehicle. With Soundstream’s Picasso Nano Amplifier, you’ll get high-quality sound without taking up too much space. 

Plus, this amp is easy to install and fits into any car – big or small. crank up the tunes and enjoy your music loud and clear!

The Soundstream Class D Amplifier is perfect for anyone looking for an amplifier that doesn’t get heated up quickly. The full-range crossovers mean you won’t experience any sound distortion, even when the volume is turned up to the max.

This amplifier has an RMS Power Rating of 4 ohms: 140 watts x 4 chans. / 2 ohms: 250 watts x 4 chans., making it capable of powering up to four speakers. 

It also features 3-way protection circuitry (thermal, overload, and speaker short protection) and a Pulse Width Modulated MOSFET power supply, ensuring your equipment stays safe and your music sounds great.

7. Wild Boar Audio WBA 300 (2 Channel Amp)

Wild Boar Audio amp

The Last and the Best 4-Channel Amp for Harley-Davidson is the Wild Boar Audio WBA 300.

This amplifier is specifically designed to work with the factory Harley-Davidson radios in 2014+ touring models. It includes easy to install mounting plates and reduced EMI technology (R.E.M.I.T.) for superb FM reception. At 300 watts, it’s perfect for powering aftermarket speakers or a subwoofer on your bike.

The Wild Boar Audio WBA 300 is the perfect amplifier for your Harley Davidson. It’s designed specifically to work with factory HD radios, and there are no crossover, gain, or EQ adjustments to make installation easy. 

The amp is also designed around a small factory charging system, so you don’t have to worry about it draining your battery. Plus, it’s 100% plug-and-play! You don’t even need additional wiring. 

The discreet surface mount technology ensures a sleek look that will complement your bike’s style, and the DC sensing turns the lamp on and off without any extra effort on your part. Best of all, you may require an OEM or Techno Research dealer radio to use this product.


What is the most powerful 4 channel amp?

There are a lot of different 4 channel amps on the market, but which one is the most powerful? In this article, we will take a look at some of the most powerful 4 channel amps and see how they compare.

One of the most powerful 4 channel amps on the market is the Rockford Fosgate  R2-500X4. This amp is capable of putting out up to 400 watts of power per channel, making it a great option for those who need a lot of power.

Can you use a car amplifier on a motorcycle?

Yes, you can use a car amplifier on a motorcycle. However, there are a few things you need to consider before doing so. First, it’s important to make sure that the amplifier is compatible with your motorcycle. Some amplifiers are designed for use in cars only, and may not work properly when used on a motorcycle.

Another thing to consider is the wattage of the amplifier. The wattage of the amplifier will need to be matched to the power output of your motorcycle’s engine. If the amplifier is too powerful, it could damage your motorcycle’s electrical system.

Finally, you’ll need to make sure that the amplifier is mounted in a safe and secure location. If it’s not properly secured, it could come loose while you’re driving and cause a dangerous accident.

What channel amp do I need to run 4 speakers?

If you’re looking to power four speakers, you’ll likely need something in the range of a 50-100 watt channel amp. More powerful amps are available of course, but if you’re just starting out or don’t have a ton of money to spend, this should do the trick. Just make sure that your speakers are compatible with the amp’s power rating!

How many speakers can I run on a 4 channel amp?

Most people would say that you can run four speakers on a 4-channel amplifier. However, there are some factors to consider when making this determination. The first consideration is the impedance (Ohms) rating of your speaker. You need to make sure that the combined impedance of all of your speakers does not exceed the amp’s rating.

Can I use a 2 channel amp for 4 speakers?

It is possible to use a 2-channel amplifier for 4 speakers, but you will need to purchase an amplifier adapter that splits the signal into two channels. This is because a 2-channel amp can only handle two speakers at once.

Another thing to keep in mind when using a 2-channel amp for 4 speakers is that you will need to make sure that the impedance of your speakers is matched. If you do not match the impedance, you could damage your amplifier.

How many watts does a 4 channel amp put out?

A 4-channel amplifier typically puts out between 75 and 150 watts per channel. However, this number can vary depending on the make and model of the amplifier.

It is important to keep in mind that you should never exceed the wattage rating of your amplifier, as this could damage the unit. Additionally, it is a good idea to make sure that you do not mismatched the impedance of your speakers and the amp.

What is difference between 2 channel and 4 channel amplifier?

The main difference between a 2-channel and 4-channel amplifier is the number of channels that each unit can support. A 2-channel amp can only handle two speakers, while a 4-channel amp can handle four speakers.

Additionally, a 4-channel amp will typically put out more power than a 2-channel amp. This is because a 4-channel amp has two more channels to work with.


As with most motorcycle accessories, there are a lot of options to choose from. We decided that the best 4 channel amp for Harley-Davidson is the Rockford Fosgate R2-500X4 Prime Amplifier. It has all of the features you need in an amplifier and it’s affordable enough so you won’t have buyers remorse when your new Harley arrives!

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