We are independent & ad-supported. We may earn a commission for purchases made through our links.

Advertiser Disclosure

Our website is an independent, advertising-supported platform. We provide our content free of charge to our readers, and to keep it that way, we rely on revenue generated through advertisements and affiliate partnerships. This means that when you click on certain links on our site and make a purchase, we may earn a commission. Learn more.

How We Make Money

We sustain our operations through affiliate commissions and advertising. If you click on an affiliate link and make a purchase, we may receive a commission from the merchant at no additional cost to you. We also display advertisements on our website, which help generate revenue to support our work and keep our content free for readers. Our editorial team operates independently from our advertising and affiliate partnerships to ensure that our content remains unbiased and focused on providing you with the best information and recommendations based on thorough research and honest evaluations. To remain transparent, we’ve provided a list of our current affiliate partners here.

What is a Tuned Amplifier?

By G.W. Poulos
Updated May 17, 2024
Our promise to you
About Mechanics is dedicated to creating trustworthy, high-quality content that always prioritizes transparency, integrity, and inclusivity above all else. Our ensure that our content creation and review process includes rigorous fact-checking, evidence-based, and continual updates to ensure accuracy and reliability.

Our Promise to you

Founded in 2002, our company has been a trusted resource for readers seeking informative and engaging content. Our dedication to quality remains unwavering—and will never change. We follow a strict editorial policy, ensuring that our content is authored by highly qualified professionals and edited by subject matter experts. This guarantees that everything we publish is objective, accurate, and trustworthy.

Over the years, we've refined our approach to cover a wide range of topics, providing readers with reliable and practical advice to enhance their knowledge and skills. That's why millions of readers turn to us each year. Join us in celebrating the joy of learning, guided by standards you can trust.

Editorial Standards

At About Mechanics, we are committed to creating content that you can trust. Our editorial process is designed to ensure that every piece of content we publish is accurate, reliable, and informative.

Our team of experienced writers and editors follows a strict set of guidelines to ensure the highest quality content. We conduct thorough research, fact-check all information, and rely on credible sources to back up our claims. Our content is reviewed by subject matter experts to ensure accuracy and clarity.

We believe in transparency and maintain editorial independence from our advertisers. Our team does not receive direct compensation from advertisers, allowing us to create unbiased content that prioritizes your interests.

A tuned amplifier is a type of electronic device designed to amplify specific ranges of electrical signals while ignoring or blocking others. It finds common use in devices that work with radio frequency signals such as radios, televisions, and other types of communication equipment; however, it also can be useful in many other applications. Tuned amplifiers can be found in aircraft autopilot systems, audio systems, scientific instruments, spacecraft, or anywhere else when there is a need to select and amplify specific electronic signals while ignoring others.

The most common tuned amplifiers an average person interacts with can be found in home or portable entertainment equipment, such as FM stereo receivers. An FM radio has a tuned amplifier that allows listening to only one radio station at a time. When the knob is turned to change the station, it adjusts a variable capacitor, inductor, or similar device inside the radio, which alters the inductive load of the tuned amplifier circuit. This retunes the amplifier to allow a different specific radio frequency to be amplified so a different radio station can be heard.

All radio-based communication devices, including stereos, televisions, and cell phones, simultaneously receive all signals present in a given area. The tuned amplifier within the device is what allows only one specific frequency to be amplified, through a process called bandpass filtering. In bandpass filtering, the electronics are configured in such a way that they only allow a specific band of frequencies to pass through the filter. In some devices, such as FM radios, the filter is adjustable. In others, such as cell phones or computer WiFi networks, the filter is fixed to a single specific frequency range.

Fixed frequency tuned amplifiers can also be found in audio processing equipment such as graphic equalizers. For example, in a five-band graphic equalizer, there are five separate controls. Each of these controls manipulates an individual tuned amplifier. In this case, each of the bandpass filters in the tuned amplifiers is fixed, allowing a distinct range of sound frequencies to pass through each of the controls. Adjusting the control for one of these bands of sound frequency adjusts the amount of amplification for the band, not the actual frequency range of the band itself.

Tuned amplifiers can have adjustable bandpass filters, adjustable amplifiers, both, or neither. The function that identifies a tuned amplifier is that the signals amplified are limited, or tuned, to a specific range or band of frequencies. The ability to be configured in so many variations for so many different purposes has made the tuned amplifier a mainstay in almost all sophisticated electronic devices that exist.

About Mechanics is dedicated to providing accurate and trustworthy information. We carefully select reputable sources and employ a rigorous fact-checking process to maintain the highest standards. To learn more about our commitment to accuracy, read our editorial process.

Discussion Comments

By Glasis — On Feb 06, 2014

On October 8, 1921 the first sports game ever broadcasted over the radio was a college football game. It featured the West Virginia Mountaineers playing the Pittsburgh Panthers.

Pittsburgh won the game 21-13 broadcasted on local KDKA Radio. KDKA is still around with two radio stations and a television station.

About Mechanics, in your inbox

Our latest articles, guides, and more, delivered daily.

About Mechanics, in your inbox

Our latest articles, guides, and more, delivered daily.