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The Best CB External Speakers to Elevates Audio Quality

Writen by Edwin Jones

Fact checked by Andrew Wright

best cb external speaker

Most CB radios come with a built-in speaker, but for some users, it isn’t enough. A lot are looking for something more powerful, and that is where the best CB external speaker enters the picture.

A high-quality external speaker elevates audio quality, making it louder and clearer. This way, it is easy to hear the person on the other line, which makes radio communications more reliable and less frustrating.

While there are tons of options for CB speakers, they are not all the same. The price alone is not a sufficient deciding factor. Below are some of the crucial considerations when narrowing down the possibilities.

  • Sound Quality: The speaker is useless if it delivers poor audio. Look for features that ensure optimal sound for the best experience. One of my favorite features is noise cancellation, which can help reduce interference and improve radio communications.
  • Power Rating: At the minimum, look for speakers with 5 watts. In the products that I will review, the highest rating is 20 watts. If the wattage is too high, you might need an amplifier or external power supply.
  • Durability: Look for long-lasting external speakers made of robust materials. Consider the materials used, which are often plastic and metal. Many speakers are for indoor installations. If you plan to use it outdoors, however, weather resistance is a crucial consideration.

Make the most of a CB radio. Pair it with a good speaker, including those I will review in this Buying Guide.

<strong>Top 1</strong>

RoadPro RPSP-15


Dimensions 8.6 x 4.7 x 2.3 inches
Weight ‎8.8 ounces
Power handling 5W

Jump to Review

<strong>Top 2</strong>

Uniden BC-15


Dimensions 4 x 2.5 x 4 inches
Weight 20.96 ounces
Power handling 15W

Jump to Review

<strong>Top 3</strong>


Dimensions 4.72 x 2.17 x 3.15 inches
Weight 9.5 ounces
Power handling 5W

Jump to Review

5 Best External Speaker for CB Radio Reviews

1. RoadPro RPSP-15 CB External Speaker

Kicking off this list of CB radio speakers is one affordable product with decent features, making it an impressive choice for most users. It works on different brands, including Motorola, Yaesu, and Kenwood.

Looking at the extensive features of this external speaker for CB radio, one of my favorites is the metal mesh grill. The latter is responsible for its durability, so I am confident that it will withstand the test of time. It serves as a protector of the driver element and internal components against external factors that can speed up wear.

Those who are looking for power will have another good reason to love this external speaker for CB. It has a power rating of 5 and 8 ohms, making it a good choice for many users. Despite being powerful, it is affordable.

While it is powerful, I like how portable the speaker is. This way, I can use and install it wherever I need a speaker for CB radio. Plus, it includes a swivel bracket for flexible mounting options. It also means that I can easily arrange its position depending on where I want the sound to be clearer and louder.

For the best bang for the buck, this CB radio system extension speaker is inclusive of the basic accessories needed. For instance, it has an eight-foot cord, which is more than enough length for most applications. It also has a 3.5mm plug.

The installation of this speaker is effortless. Even for first-time users, it is a breeze to assemble the CB speaker.

 Heads-up:  However, one drawback is that some users may find it to be not loud enough.

 What We Liked: 
  • Has a durable metal mesh grill to protect internal elements
  • Powerful speakers with a rating of 5 and 8 ohms
  • The swivel bracket allows versatile positioning
  • Easy installation process even for new users
  • Includes a long eight-foot cord
 What We Didn’t Like: 
  • The audio may not be loud enough for some users
 Bottom Line:  Overall, this external speaker for CB radio stands out because of its durable construction, powerful sound, and flexible mounting.

2. Uniden BC-15 CB External Speaker

The Uniden BC15 Bearcat is another product I can highly recommend for high-quality external speakers for CB radios. It does not just work for a CB but also a police scanner and a ham radio.

Among the best things about this external CB speaker is its maximum power rating of 15 watts. Meanwhile, it has a frequency response of 500 Hz to 5 kHz. With such technical specifications, it is impressive for various communication receivers.

The built-in noise blanker is another feature that makes this a great option for the best external speaker for two-way radios. It is a circuit that reduces the impact of radio noises on received signals. As a result, I enjoy minimal electrical interference for crystal-clear sound.

CB speakers must be user-friendly, and such is another reason why this model is a deserving option. Installing it is as quick as mounting the unit, plugging the 10-foot wire that comes with the radio, and enjoying its functionality.

I am also a fan of the rugged design of this CB radio speaker. The two-toned face plate is built in such a way that it will last a long time. It is not like one of those cheap CB speakers that feel like a toy.

It is also worth emphasizing that this CB radio with external speaker has a noise-canceling feature. With a flick of a switch, the latter automatically activates, which helps in having a good experience.

 Heads-up:  A minor issue in this CB radio speaker is the positioning of the screw mounts in the bracket. They are a bit awkward, which makes it easy for the unit to fall off its face once mounted.

 What We Liked: 
  • Has 15 watts of power and a frequency response of 500 HZ to 5 kHz
  • Reduced noise and interference with the built-in blanker
  • Effortless installation even for newbies
  • Rugged construction with a two-toned design
  • Effective noise cancellation
 What We Didn’t Like: 
  • Awkward positioning of bracket screw mounts
 Bottom Line:  Overall, this small external CB speaker from Uniden is commendable because of its tough build, crystal-clear sound, and easy installation.

3. VECTORCOM TRD550 CB External Speaker

The affordable price of this CB radio external speaker is among the first appeals that users will notice. While it is affordable, it has decent features to be a worthy alternative for our old speaker.

Among others, a major reason why CB users choose this radio external speaker is that it has great specs. Even if it is only three inches, it has an impedance of 8 ohms and power handling of five watts. With such features, I am confident that it will deliver exceptional audio performance.

Many of the CB external speaker reviews will agree with me on one thing – this model is easy to install. Right out of the box, assembly is a breeze, even if you are not an expert. I love the plug-and-play functionality that simplifies the process.

I also like how small it is. Despite its size, however, it does not compromise the sound output. Honestly, the audio quality may not be the best, but with its price, I believe that it is good enough for most users. It is not easily prone to distortion, unlike other speakers at this price point.

For those who do not like obtrusive CB external speakers, this is a great option. The rectangular body is discreet enough, making it easy to conceal, especially for in-car installations. It will not be a distraction in the interior.

 Heads-up:  Nonetheless, one shortcoming of this CB speaker is that it isn’t loud enough, even when the volume is high.

 What We Liked: 
  • A reasonably priced CB radio external speaker
  • 5-watt power and 8-ohm impedance for exceptional sound quality
  • Plug-and-play installation for easy mounting
  • Compact design for discreet installation
 What We Didn’t Like: 
  • Not loud enough even at a high volume
 Bottom Line:  Wrapping up, this external CB radio speaker is affordable and portable while delivering decent quality.

4. Astatic 302-VS4 External CB Speaker

Another great speaker at an affordable price, this model requires only 5-watt power, thus perfect for people on a budget. Even so, it has nice features that are comparable to more expensive options for CB extension speakers.

One major reason why it stands out is the noise-canceling filter. The latter improves audio quality by removing hissing and other white noises. The result is that it isn’t annoying while also making it easier for me to hear the other person clearly.

When I purchased this external speaker for CB radio it came with a ten-foot cord for flexible installation. Whether it is for my car or for home use, I like how long the cord is so I can run it to my radio without a problem. The set also includes a 3.5 mm plug.

More so, the CB speaker also includes a mounting bracket, which will simplify its installation. I can mount it almost anywhere in my vehicle, although my personal preference was to install it on the dash.

This speaker for CB radio is plenty loud! It is one thing that surprised me since I expected it to be not as loud since it is quite small. Nonetheless, I was wrong since it has a decent volume upon testing. More so, this amplified CB speaker generates clear and crisp audio without interference or static.

 Heads-up:  Looking at the cons, one that some people did not like is the CB external speaker plug. It is too short, which might not have a snug fit in many sockets.

 What We Liked: 
  • With a power rating of 5 watts, ideal for travelling
  • Excellent noise cancellation for clearer audio quality
  • Complete set with a ten-foot cord
  • Loud audio despite its size
  • Does not generate static or interference
 What We Didn’t Like: 
  • Short plug that might not easily fit in many sockets
 Bottom Line:  Another top-notch option for the best external CB speaker, this product from Astatic is small but loud, ensuring clear sound output despite its size.

5. Midland 21-406 CB External Speaker

Wrapping up this list of the best external speakers for CB radios is amongst the most expensive in this guide. However, do not let such discourage you from choosing this model.

Among others, it is worth every dollar because of the dynamic speaker with a switchable noise filter. I have the option to activate the feature when necessary. When it is on, I can expect radio communications to be clearer as it reduces interference and noise, resulting in improved sound quality and a more pleasant experience.

This extension speaker for CB is also notable because of the swivel bracket. It makes the installation more flexible while also providing the opportunity to reposition the speaker depending on where I need to direct the audio.

Looking at the technical specs of this external speaker for CB radio, it is impressive because it has 20 watts and 8 ohms. It may not be the most powerful on this list, but it has exceptional sound quality that makes it an option worth considering.

More so, the extension speaker is also notable because of its user-friendly installation. While I had the option to mount it using screws, I chose to position it in my car using double-sided tape. It also has a long wire, which is long enough to route it on the radio.

 Heads-up:  However, a minor issue of this Midland external speaker is its plastic housing. It can resonate when the volume is high, which can result in sound distortion.

 What We Liked: 
  • The noise filter reduces interferences and improves sound quality
  • Has a swivel base mounting bracket for flexible installation
  • Delivers 20 watts and 8 ohms for reliable sound
  • Easy to install even without drilling
 What We Didn’t Like: 
  • The plastic housing causes distortion
 Bottom Line:  Overall, this high-quality speaker might be expensive, but it is worth every dollar. From the rugged construction to the impressive sound quality, it is a standout.

What to Look for When Choosing CB External Speakers


Whether you are connecting the speaker to a Kenwood, Yaesu, ICOM, Ranger, or any other brand of CB radio, you will find a long list of alternatives. Go beyond the price and consider the following factors:

  • Sound Quality

The most important factor is the quality of sound the speaker generates. If it is inferior, then the speaker is useless and will be nothing but a waste of money. Volume, clarity, and stability are some of the most important. If you want it loud and clear, choose an amplified speaker.

More so, you should also consider one with a noise filter. The latter is responsible for minimizing the background noise, including hissing. It ensures clearer audio, regardless of the surrounding conditions.

Some users prefer external speakers with volume control. The latter makes it quick to increase or decrease volume depending on individual needs. When the radio has no such feature, you can adjust the loudness directly on the radio.

  • Power Rating

Evaluating the technical specs is vital when looking for a CB external speaker. The power rating, which is expressed as watts, is among the most important. At the very least, the speaker should have 5 watts. Nonetheless, you also do not need one that is too high as such might require an external power source.

  • Durability

Even if most external speakers are affordable, this does not mean that durability is compromised. Look for high-quality materials that can withstand the test of time. Plastic and metal are two of the most common materials used.

Metal is more durable. But if the plastic used is superior, then it can also be long-lasting. If it is for outdoor use, then choose a weatherproof CB radio speaker.

  • Mounting Options

Most of the best external speakers for CB radios are already inclusive of mounting hardware, including a bracket. Some are already pre-drilled. A swivel bracket is a good choice if you want to move the speaker in different positions, so you can direct the sound where you want it to be.

  • Size

Bigger is not always better. As mentioned in the products above, even the small ones can be powerful. Especially if you will install the radio speaker inside the car or any other place with limited space, small ones are good, but make sure that the performance is not compromised despite the size.

  • Type of Speaker

There are two main types of CB speakers.

  • The first is an extension speaker. This is perfect for people who are looking for sound clarity as it makes the audio clear and crisp.
  • Another option is a PA speaker for CB radios, which is for those looking for amplified sound. The loudest CB PA speaker makes it easy to communicate with those outside the vehicle.
  • Talkback

A premium feature that you will find in high-end CB speakers is talkback. A speaker with talkback will let you hear your voice. Alternatively, you can adjust it accordingly.

An example of a product with such a feature is the Cobra HG S500. This Cobra external speaker lets you listen to your voice during transmission, which is useful when using radio for public announcements.

When Does It Become Essential to Have a CB External Speaker?


In most cases, CB radios have a speaker built-in on the unit. It will let you hear incoming signals.

However, not all built-in speakers can deliver clear sound. If you feel that the volume is too low, then it is a wise idea to invest in an external speaker. It is essential for making the audio louder.

What is the Ideal Size of Jack for CB External Speakers?

The ideal size for a CB external speaker jack is 3.5mm. This is the size of the jack of the products that I reviewed in this buying guide.

Are the Smaller CB Speakers Poor in Sound Quality?


No, smaller CB speakers do not necessarily translate to poor sound quality. It isn’t the main determining factor of the speaker’s performance.

Instead, it will depend on other things, such as the quality of the speaker itself, including its technical specifications and features.

Do CB Speakers Require Battery?

They do not need any battery. Instead, they will run through the power source of the radio. Depending on the type of the CB radio, it might require a power supply, or you can hook it directly to a car battery.

How Do I Connect my PA Speaker to my CB Radio?

CB PA speakers can enhance the functionality of your radio, but you need to know how to connect them properly. First, you need to prepare three things – the CB radio, the PA horn or speaker, and a wire of appropriate length, depending on what the installation requires.

Start by wiring the radio to the power source. Next, connect the PA speaker to the CB radio by soldering the wires. Once the wires are connected, you can now start using the CB with a PA system.

Can You Use a Car Speaker for a CB Radio?

Yes! However, while you can run a CB radio through car speakers, it may end up being underpowered. In most cases, it will not be any louder than the speaker on the radio itself. Hence, if you want more power and better clarity, it is best if you can use an external speaker.


The best CB external speaker improves the overall listening experience. A high-performing product will change the way you communicate on a CB radio. The options are endless, but this does not mean that they can all deliver astounding quality.

Keep an eye on the products mentioned above and it is hard to go wrong! Invest in the right product and enjoy a better CB radio experience!

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