You cannot go wrong with good quality music, especially while you are on a long trip.
Music is food for the soul and studies have proven that it helps to ease stress and aid relaxation.
What better time is it for some good music, if not on the go? Getting a good amplifier will make you hum your way to your destination and give you a pleasurable ride altogether.
Are you a motorcyclist? Do you need an excellent motorcycle amplifier? What is the best 4 channel amp for Harley?
We seek to answer all of your questions and help you get the best amplifier for your Harley motorcycle.
Our best pick motorcycle amplifier is the Kenwood Compact 4 Channel Digital Amplifier. Who wouldn’t love this amazing performance amplifier?
It is built with weatherproof technology that allows it to stand the test of time. It features Bluetooth, amplifiers, volume control features, powerful speakers, and other amazing features that are designed to give you good quality sound all the way.
Best 4 Channel amp for Harley 2021
We have made a list of the top 10 motorcycle amplifiers that would be just the perfect companion for your journey while providing you with an amazing combo of loud and quality sound. You can be sure that we selected the best and you can expect nothing less.
Here is a review of the top ten motorbike amps that you can get on the market today.
1. BOSS Audio Amplifier
BOSS is a brand that is known to provide high-quality devices, and that can be seen in their MCBK470B model. It is more than a motorcycle Bluetooth speaker system, as you can see from its features in this review.
Bluetooth – MCBK470B can control and play a vast collection of your music from your MP3 device, smartphone, or other Bluetooth-compatible sources. The system also plugs into other apps such as Pandora and Spotify wirelessly, making it a versatile unit.
Amplifier – One thing you get when you choose this system is a compact Bluetooth class D amplifier. And you don’t need to worry about the weather when riding your bike since the amp is weatherproof.
Weatherproof – Talking of weatherproof, that is all possible thanks to the latest weatherproofing technology that protects against all elements.
Speakers – Other parts you get in the package are four speakers, 3-inch each, that comes in black color. They come with adjustable brackets that can let you fit them on handlebars of between 0.75-inch to 1.25-inch.
Playback – The system also offers playback ability due to the 3.5 mm auxiliary input that enables you to connect it with audio outputs of MP3 players and smartphones.
Volume control – You can also install an inline volume control anywhere you want on the Bluetooth speaker to let you vary the volume when you want.
- Able to withstand harsh weather
- Has adjustable handlebar brackets
- Convenient and simple installation
- Short linking wires
2. Rockford Fosgate Amplifier
Most motorcycle amplifier reviews have PBR300X4 on their list due to the fantastic features that make it a motorbike device. We also have it in this review, and you are about to find out where it is some common.
Ultra-compact – The first thing you might notice about this gear is its ultra-compact nature, measuring 1.53 x 4.25 x 6.75 inches. That makes it easy to install on your bike and ensures that it doesn’t use much space or even add unnecessary weight.
Four-channel amplifier – A lot of motorbike riders love this system for its full-range four-channel amp design for stereo rear/front system that provides up to 300 watts of power. And they don’t need lots of energy to give out the excellent and high-quality music you desire.
Booster rail technology – The device also features the brand’s patented boosted rail tech. That rail ensures it offers a storage reserve of power for a prolonged burst of energy.
High-level inputs – Another feature that you might like about this amplifier is the MOSFET output stage and variable 4-6 volt hi-level DC turn-on control. That lets you enjoy up to 12dB/octave of sound to enable you to listen to your music without interference from the bike’s noise.
Twelve months warranty – You need to buy this machine from an authorized dealer to enjoy the 12-month warranty. The warranty covers any premature damage that might occur due to the manufacturer’s fault.
- Top-quality amplifier
- Provides clear sound under noisy conditions
- Doesn’t use much power
- One-year warranty is short
3. Kenwood Compact Amplifier
As the name suggests, Kenwood KAC-M 1804 is a compact amplifier that you can use to pump up your bike’s audio. It is also an ideal model for use in cars and has some of the best features of Bluetooth amps today.
Improves sound – The device enhances the sound of almost all music sources on land, air, or water, making your music clear. And you can fit it in virtually any place even if space is limited.
Motorcycle amplifier 4 channel – It is a four-channel amp that is suitable for most bikes. That comes in handy if you want to listen to the authentic sound of your jams while on the go.
Protection cover – Another notable feature of the model is the plastic covers that protect its connections and other qualities. There is also a conformally covered circuit board that keeps moisture and salt away – you can ride even when the weather is wet.
Compact design – By now, you know that this is a small device, but what you might not know is the benefit it brings. That design enables you to install the system with ease.
CEA-2006 Standards – You should always aim to purchase devices that meet the industry standards, and this amp does just that. That gives you peace of mind when the system is on your motorbike, car, or marine vehicle.
- Resists weather damage
- Easy to install and take care off
- Comes at an affordable price
- Not quite a universal fit device
4. Velex Bluetooth Amplifier
You cannot miss the Velex Water Resistant Bluetooth Marine 4 Channel Class A/B Amp from the list of the best 4 channel amp for Harley. It is a system that was made for all motorbike use, and it has a lot to offer.
Water-Resistant – One thing you should look out for when buying a motorbike amp is the ability to resist harsh elements. That is why Velex ensured that this gear would continue to operate even if it starts to rain when you are in the middle of nowhere.
Stainless-steel hardware – You might have guessed that this hardware ensures that the amplifier remains in top condition for a long. The stainless-steel, plus conformal-covered PCB makes the system give you value for your money due to its durability.
Compact design – Just like most models in this review, this unit boasts a compact design that lets you install it in tight spaces. It won’t take much space when resting on your bike.
Easy to install – The system doesn’t come with a lot of wires that can make it hard to install
Price – One thing that makes many motorbike owners get this device is its affordability. You get to take care of your pocket while you guarantee quality music when riding your motorcycle.
- From a reputable brand
- Able to resist the harsh climate
- Easy to install
- Can break if it falls
5. Kenwood Motorcycle Amplifier
Chances are you will get Kenwood KAC-M3001if you go online and search for mini amps for motorcycles. It is one of the most popular models you can get out there, and that is made possible by its leading features.
Provide bass – The model gives out the bass you need for your motorbike with up to 300 w per channel. That is enough to listen to your music even when the bike’s noise is high, or you are on a busy highway.
Easy to fit – The fact that it is a compact monoblock system makes it ideal for fitting in most areas, including a bike, ATV, or boat. You can take it with you whenever you want, not just for your motorbike use.
Conformal coating – If there is one feature that makes an amp durable is the coating that can protect it from dirt and water. You can ride your bike even when it is raining and still have peace of mind of having a safe Bluetooth amplifier.
Bluetooth – It comes with a universal Bluetooth that enables you to connect it to any source of music that accepts Bluetooth. The best thing is that the receiver turns on when it detects the presence of a Bluetooth signal.
- Class D technology
- A compact model
- A multi-purpose amplifier
- No warranty
6. Kenwood Compact Amplifier
You cannot go wrong with the Kenwood M1824BT is you are looking for the best motorcycle amp. It is a product that comes from a reputable brand and provides most of the features that an amplifier should have.
45W RMS per channel – It might not offer the highest watt out there today, but you can enjoy the 45W RMS per channel. That is twice the power of most car stereos.
Super-compact – Another feature that makes this system to be excellent is the compact design that makes it possible to fit in tight spaces. You don’t need to waste much space when installing the amp, and you can do that without any professional help.
Add clarity – We all love amps for the clarity they provide to our favorite music. That is especially true if you have the M1824BT from Kenwood.
Protective features – The first protective feature that you will notice of this system are the plastic plugs. They help to prevent power problems when connecting to the speakers. It also has a conformal coated circuit board that ensures your gadget remains dry.
No receiver needed – The system lets you enjoy your music wirelessly when on the go. You can quickly get the jams from your smartphone device or any other machine that allow the use of Bluetooth.
USB port – There is a USB port on the amp that enables you to charge your devices – you don’t miss the fun.
- Doesn’t require a receiver
- Connects with most devices
- Suitable for wet conditions
- Only 45W of power
7. DS18 CANDY Amplifier
DS18 is one of the leading motorcycle speakers and amps manufacturers in the world today, and one of its most popular products is the CANDY-MICRO2. It is one of the ideal amps that can change the way you listen to your music while on the go.
Sufficient power – It is a mini model that gives you enough energy to carry your music with you when moving from one location to the other. You can be confident of enjoying up to 80W per channel and hear clear music.
Multiple applications – The CANDY-MICRO2 is not just a model for bike use because you can use it for other automobiles. That is all possible thanks to the 2-8 ohms that make it compatible with a variety of speakers.
Compact mini design – It is among the few small gears that you can find on the market today. Most of the motorbike amps while coming in a compact nature but this one has a real mini design.
Innovative brand – The motorbike amplifier comes from an innovative brand that makes it stand out from the rest. You can get value for your money with this system since it gives you years of service.
Easy to assemble – With no wires to connect, you can easily connect the system and start using it instantly. You don’t need to seek help from a friend or a professional that can cost you money.
- Doesn’t drain the battery
- Mini design
- Easy to assemble and install
- Not quite powerful
8. Cerwin-Vega Amplifier
Next in our motorcycle amp reviews is the B52 Stealth Bomber Class D Amp from Cerwin-Vega. It is one of the top amplifiers that you can use for all your devices and ensure that you get music with more clarity.
Auto turn-on – We all want a device that can give us an easy time when using and that is what you get from this gadget. You don’t need to press a switch or do anything to start listening to your jams.
More compatibility – The auto turn-on feature also makes the amp to be compatible with most devices and use it with multiple devices. You should note that this is a 2-channel device that gives you enough power to hear the sound even if your bike is noisy.
Thermal protection – The thermal protection and rollback power let you use the gear when riding under harsh weather conditions. Thus, you can use it when it is raining or on sunny days.
BRT port – That port works effectively with mobile’s Bluetooth receivers to give you a reliable connection for streaming songs with all Bluetooth-enabled gadgets.
Ultra-compact – Another great feature is the compact nature of the amp and is made of quality aluminum alloy.
Extended mounting feet – It is a great feature that makes it possible to install the amplifier without needing any help.
- Advanced thermal protection
- Auto turn-on ability
- Ultra-compact design
- Slightly expensive
9. KICKER PowerSport Amplifier
Kicker designed the PX 2 Channel PowerSport Amplifier to work in your sports bike, boat, car, tractor, and other automobiles. It is a system that uses 12v charging devices to give you neat and clear music.
Weather-resistant – An amplifier needs to be weather-resistant to be listed among the best 4 channel amplifier for Harley Davidson. It continues to function effectively no matter the weather, and that is all possible due to the material used to make it.
Compact design – Another great feature is the compact design that lets you hold the amp in your hands with ease. That means you can install it in tight spaces without any hassle.
Two-channel amp – That enables you to use the system in all 12v charging systems without causing power drainage. And you can expect to get a power output of about 25W per channel.
Twenty-four months warranty – You also get peace of mind if you choose this amp because it comes with a two-year warranty. The warranty covers all premature damage or fault that might arise due to manufacturing fault.
Easy to install – You don’t need to be a professional to install this system on your motorbike. What that means is that you save on money since you don’t need to hire a professional.
- Compact and light design
- Easy to install
- Has a two months warranty
- Not quite durable
10. Gravity Audio Amplifier
Gravity Audio GBR300-4DM True 600W RMS Digital 4-Channels Amplifier is an ideal system that you can use for your motorbike needs.
4 Channels – It is a 4-channels model that comes with a bridgeable tech and IPX65 to make it waterproof. What that means is that you can use it when it is raining or during sunny days and expect it to last for long.
For Stereo Rear/Front – One great feature of the system is the ability to function via the stereo rear and front systems. You can be confident it will give you the most precise music you have always wanted when on your motorbike.
Durability – We all want durable products that can give value for our money, and that is precisely what you get when you choose this gear.
Easy to assemble and install – You don’t need to make a lot of connections since it comes assembled. That ensures that you get an easy time when placing it to have your jams playing as soon as you receive it.
Compact design – The design comes in handy to make sure that you place it in tight spaces with ease.
- A very affordable product
- Offers up to 4 channels
- For rear and front system
- Short term warranty
How to Buy The Best 4 Channel amp for Harley
Choosing a Bluetooth motorcycle amp for your bike does not have to be a tiring process, especially if you know what you are looking for. Below I have looked at some of the features or factors that you should consider when choosing an amplifier for your motorbike.
Number of Channels
You might have noticed from the above review of the top ten motorcycle amps that these systems come with variable channels. If you are a novice, “channels” are the number of speakers an amplifier can power successfully.
Therefore, if your audio source is made of a single subwoofer or speaker, then you need to consider choosing a mono-channel amp. A 2-channel amplifier can power a maximum of two speakers, a 3-channel one, three speakers, and so on.
Also, note that some amplifiers can let you bridge channels to create a single channel that produces better music for different speakers.
Another feature that you should consider is the physical size of the amplifier you want to buy. You can get a mini amp for a motorcycle or even whatever size you want – most of the products in our review come in small sizes.
With that said, I would recommend you double-check the size to make sure that the amp you choose fits your needs. Don’t just pick a gear because it is listed as a compact and small unit.
You also need to check at the power rating of the amplifier you intend to buy and make sure that it matches your speakers. Not matching the speakers with the amp can result in overpowered or underpowered speakers.
For instance, if you select an amplifier that supplies the speakers with more power, they might blow out. On the other hand, less power can mean that you get weak, unclear, and distorted sounds.
Check the RMS rating before you settle for a specific amp to ensure that you get the ideal match for speakers and the amp. The RMS rating shows the amount of power the amp can provide consistently.
Some things to note
- Make sure that the amplifier is compatible with your motorbike audio system – not just the speakers.
- Go for an amp with low deviations and extended frequency responses.
- Check if the amplifier is listed as THD (distortion) – the lower, the better.
Here are some of the other things that you should consider when choosing your motorcycle amplifier.
- Weatherproofing – Go for a model that has a weatherproof design to ensure that you use it in harsh conditions.
- Easy to install – Choose a system that you can quickly put in place without needing additional tools or professional help. It should also come with an installation manual.
- Bluetooth connectivity – A motorcycle amplifier Bluetooth is a must-have feature if you don’t want to connect wires.
- High/low pass filter – Low pass filter cancels higher frequencies. The top filter cancels lower rates. That gives you a clearer and smoother sound output.
- Warranty – It helps to safeguard your money in case the amp stops functioning.
How to Install Amps on the Motorcycle
Having an amp on your bike can make cruising the countryside or town much fun. You can easily install your favorite amplifier without any hassle of your follow these steps.
First, let’s look at the things you might require:
Things You’ll Need
- Motorcycle amplifier
- Speaker (s)
- Simple brackets
- Electrical tape
- Bolts or straps
Here are the steps to follow:
1. Choose a Motorbike Amp
We have already looked at how you can choose an amplifier for your motorcycle. Take into consideration what we have discussed above and moved to the next step.
2. Strap or Bolt the Amp
Select the ideal place for placing your amplifier and put it. Then you can strap or bolt it to remain secure and let you ride even in rough roads.
A bolt-system should come with all the parts you need to secure it.
3. Connect the Power Wiring
Now you can connect the wire from the battery too (below the seat) to the motorbike amplifier. Let the wire pass below the tank to remain hidden – that will minimize damages.
You should also consider using electrical tape to keep the wires in place after every four inches or so. Coil and tape any extra wire and hide it under the framing.
Secure, twist, and solder the ends of the wires.
4. Place the Speaker
Place your speaker or speakers the desired place on your motorbike. You can use brackets to place the speaker frame mounts or plastic ferrings.
Hide the speaker as much as possible and make sure it is secure to give you the ideal sound. The sound can be affected by the vibration of the speaker.
5. Connect the Audio Wiring
Again, run the wiring from the amp to the speaker. Ensure that they remain hidden under the tank. Also, twist and solder the ends.
6. Test the Sound
Now you can test the sound for treble and bass. Adjust accordingly to get clear music that you can enjoy wire riding your bike.
Below are some of the most frequently asked questions about motorbike amplifiers.
You can install an amplifier on any place you feel comfortable with and where you can access it. Mostly, these devices are connected to saddlebags, handlebars, and tank bars, or even under the headlight.
You can also place your motorcycle amplifier under the seat if there is enough space to do that. The critical thing to remember when placing your device is to ensure that it doesn’t hide the audio inputs for connecting memory card readers, smartphones, and USBs.
Impedance is used to refer to the ratio of resistance to current flow in any electrical system. It is measured in ohms.
Motorcycle amplifiers come with variable RMS power output per ohms. Of noteworthy is to note that a higher impedance means that less current will flow.
It depends on the kind of amplifier you buy for your motorcycle. You can connect the amp directly to your bike’s battery or the deck’s power supply.
Either way, you can easily install this amp to your motorbike and listen to your favorite music while on the go.
That depends on the size of your amp and the faring space. With that said, most motorbike amplifiers can easily fit above the head areas.
No. It is not ideal to use your car amplifier on your bike. That is because a vehicle amp is made to handle high loads of power – it can kill your bike’s battery faster.
Thus, you can begin to experience problems like engine failure, dimmer lights, and more.
It is an electronic gadget that boosts the signal from the audio input like a CD player, radio, MP3 player, and so on. The device can also increase the signal from memory card, smartphone, and even Bluetooth signal.
They do that by changing the amplitude of the signal to produce a stronger signal. That is why they can provide powerful music.
It is a motorbike amplifier that can connect to all Bluetooth devices to give you better and clearer music. We love this product as it is waterproof, meaning that you can use it even during the rainy days.
The system was made to last for years and is more affordable than most motorbike amps out there. It is highly recommended if you want a product that you can depend on for years.
Riding your motorbike for long-distance while listening to music is a priceless adventure. The music makes you happy and provides you with the energy to complete your trip.
Also, investing in the best motorcycle amplifier does mean that you get entertained while traveling. A good amp should be affordable, durable, and give you a clear sound that you can enjoy despite the bike’s noise.
We have looked at the review of the best 4 channel amp for Harley out there to help you choose the best. Head online and select the one that suits your needs.