Do TV Antenna Amplifiers Work?

Discover the ins and outs of TV antenna amplifiers from an expert with years of hands-on experience. Learn how to boost your signal for crystal-clear reception with practical tips and insights.

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Think of a TV antenna amplifier like a megaphone for your television: it can make the shows you watch clearer and stronger. But turning up your amplifier too much can mess up your TV signal and scramble the picture. 

It’s kind of like how shouting too loud can hurt your ears. It’s all about finding that “just right” volume to enjoy your favorite channels without any fuzziness.

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My experience: I have been using various TV antenna amplifiers for years. I grew up antenna-based household with analog, the over-the-air TV standard through the 1970s and 80s. 

As a reviewer of TV-related products, I have helped friends and family wrestle with getting the best over-the-air reception. My experience spans across rural areas like Southern Maine where broadcast towers are far off, and metropolitan areas like Los Angeles where the spectrum of over-the-air signals is quite congested.

What is an Antenna Amplifier?

An antenna amplifier, often known as a signal booster or signal amplifier, is a device designed to improve the signal strength received by a TV antenna

Amplifiers are particularly useful in areas with weak signals, where they can boost the reception quality of the transmitted frequencies. 

By increasing the gain, measured in decibels (dB), amplifiers can enhance the clarity of the TV signal, reducing the graininess or loss of signal that viewers might experience. 

In regions that are congested with radio, mobile phone signals and high-voltage power lines, an amplifier can help mute some of this added “noise” that a TV antenna might pick up that can interfere with picture quality. 

Your goal is to mute the noise, so your TV signal has a clearer or becomes “louder”, so that it can shout above the all other over-the-air signals or interference.

Some indoor and outdoor TV antennas may include a built-in amplifier, or one that simply powers on and off, with no ability to adjust the gain. I find these kinds of amplifiers to be limiting in a number of ways. 

I have learned from firsthand experience that you are going to have a much easier time benefitting from an antenna amplifier that has an adjustable gain. 

Understanding Signal Gain in Antenna Amplifiers

When you’re looking for the right antenna amplifier, you might come across the term “gain” a lot. 

Think of gain as the helping hand your TV signal gets to climb over obstacles and reach your TV. 

It’s like when you use a megaphone to make your voice louder at a sports game. An amplifier with gain boosts the signal from your antenna so that it can travel further and clearer to your TV, just like how a megaphone makes your cheers heard across the stands.

Why Gain is Like a Superpower for Your Antenna

Gain is measured in decibels (dB), which is a fancy way of saying how much oomph we’re adding to the signal. A higher number means more boost, like turning up the volume on your favorite song. 

But be careful, because too much gain can be like blasting music so loud it becomes just noise. If an amplifier adds too much gain, it can actually scramble the TV signal, making your picture fuzzy or causing channels to disappear.

Choosing the Right Amount of Gain

So, how do you know how much gain is just right? It’s a bit like Goldilocks finding the perfect bowl of porridge. If you live in a place where the TV signal has to travel a long way or get through lots of buildings, trees, or hills, you might need an amplifier with a bit more gain. 

But if you’re closer to the TV broadcast towers, a little gain goes a long way.

Remember, the goal is to get a clear picture on your TV without any static or ghosting. So, when picking an antenna amplifier, look for one that offers enough gain to make your signal strong but not so much that it turns your favorite shows into a snowy mess.

Can I Add an Amplifier to an OTA Antenna?

Yes, you can add an amplifier to an Over-The-Air (OTA) antenna to improve reception. This is especially helpful if you’re dealing with weak signals or signal losses due to long cables or multiple splitters. 

A preamplifier can be installed close to the antenna to strengthen the signal before it travels through the coaxial cable, minimizing potential losses.

Choosing Between a Distribution Amplifier and an Antenna Preamplifier


When you’re setting up your TV antenna to catch all your favorite channels, you might need a little extra help to make sure the picture comes through nice and clear. 

That’s where amplifiers come in, but not all amplifiers are the same. Let’s talk about the two main types: the “distribution amplifier” and the “antenna preamplifier.”

What’s a Distribution Amplifier?

Imagine you have a big jug of water (your TV signal) and you want to fill up several cups (TVs in your home). 

A distribution amplifier is like a splitter that divides the water evenly so each cup gets filled without spilling a drop. This gadget is perfect if you have more than one TV at home and you want to make sure they all get a good signal from your antenna. It makes sure that the signal doesn’t get weaker when it’s shared across different TVs.

I think the Antennas Direct 4-Port TV Distribution Amplifier is a good pick for this kind of setup.

And What About an Antenna Preamplifier?

Now, think about the water in your jug being really low to start with. 

A preamplifier is like adding more water to your jug before you even start pouring. It boosts the signal right at your antenna, which is great if you live far away from the TV towers or if there are lots of things like buildings or trees in the way. It gives your signal the strength it needs to reach your TV without getting fuzzy or lost.

The Antop HD Smart Boost Amplifier has an adjustable dial, and built-in filter to block 3G and 4G wireless signals. The Antennas Direct ClearStream Juice VHF/UHF Low-Noise Preamplifier System is a better pick if you are setting up a preamplifier outdoors.

Knowing Which Antenna Amplifier You Need

So, how do you know which one to choose? If your TV picture is snowy or keeps cutting out because the signal from the antenna is weak, you might need a preamplifier to boost it up right from the start. I prefer using a preamplifier with an adjustable gain.

But if the signal is strong at the antenna and you just want to send it to several TVs without losing quality, a distribution amplifier is your best bet.

Remember, it’s all about making sure the signal from your antenna is strong and clear by the time it gets to your TV, whether that’s with a little boost at the start or making sure it’s shared evenly across multiple TVs.

My best antenna amplifier setup

During my antenna trials in the woods of Southern Maine, I learned a valuable lesson about the power of different kinds of amplifiers. 

Initially, I used a standard amplifier with a multi-directional antenna, which brought in several channels but struggled with pixelation and failed to pick up the local FOX station 40 miles away.

antenna amplifier
(Photo credit: Jim Kimble / The Cord Cutting Report)

I then switched to a simpler-looking directional antenna, elevated on a five-foot pole, which managed to catch the elusive FOX station, albeit with a shaky signal. 

The real game-changer came when I replaced the standard amplifier with an adjustable preamplifier. By simply dialing down the gain, and re-scanning channels, the FOX station’s signal sharpened to crystal clarity.

The real game-changer came when I replaced the standard amplifier with an adjustable preamplifier. By simply dialing down the gain, and re-scanning channels, the FOX station’s signal sharpened to crystal clarity.

This experience taught me that the right amplifier isn’t just about more power; it’s about control. The ability to fine-tune the gain was crucial in optimizing reception, proving that sometimes the key to a perfect picture is in the subtlety of the adjustments.

Related: 16 Ways to Improve OTA Antenna Reception

How to Install an Outdoor Antenna Amplifier?

Installing an outdoor antenna amplifier involves connecting the device between your TV aerial and the TV set. It typically requires a power supply and should be placed as close to the antenna as possible for optimal amplification. Installing close to the antenna isn’t always possible.

So make sure that all cables and connections are secure to avoid interference and maximize the reception quality.

Do Amplified HDTV Antennas Increase Reception?

Amplified HDTV antennas can increase reception by boosting signal strength. 

This is particularly beneficial for picking up HDTV signals, which require a good signal to transmit high-quality images and sound. However, amplifiers work best when there is a signal to amplify. They cannot create a signal where one does not exist.

Are Amplified Antennas Better?

Amplified antennas can be better in certain situations, such as distant transmitters or multiple obstructions like buildings, mountains or high-voltage power lines.

They can provide a stronger signal and better positions for receiving broadcasts. However, if you are close to transmitters and already have a strong signal, an amplifier may not be necessary.

Can You Amplify an Antenna Too Much?

Yes, it is possible to amplify an antenna too much. Over-amplification can lead to signal saturation, causing interference and a decrease in signal quality. It’s important to use the right type of amplifiers and adjust the gain appropriately to avoid overpowering the signal.

Do I Need an Amplified Antenna in RV?

In an RV, an amplified antenna can be quite beneficial, especially when traveling to areas where the signal might be weaker. A good signal is crucial for consistent TV reception in an RV on the move, and an amplifier can help maintain a strong signal.

Do You Need a Converter Box for an Amplified Antenna?

A converter box is not necessary for an amplified antenna if you have a modern TV with a built-in digital tuner. The amplifier’s purpose is to strengthen the existing signal, not convert it. However, if you have an older analog TV, you will need a converter box to translate the digital signals it receives.

Do Antenna Amplifiers Go Bad?

Like any electronic device, antenna amplifiers can go bad over time. Factors such as power surges, lightning strikes, or simply the lifespan of the components can affect their performance. Regular checks and maintenance can help ensure antenna amplifiers continue to function effectively.

Jim Kimble is a seasoned industry expert with over two decades of journalism experience. He has been at the forefront of the cord-cutting movement since 2016, testing and writing about TV-related products and services. He founded The Cord Cutting Report in 2016, and serves as the editor.

Major publications, including MarketWatch, Forbes, and South Florida Sun Sentinel, have interviewed Kimble for his years of expertise. He gives advice on the complexities consumers are navigating with streaming options, and over-the-air TV. Kimble has been a staff writer or correspondent for several award-winning, daily newspapers, including The Boston Globe.

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