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This section provides an overview for audio transformers as well as their applications and principles. Also, please take a look at the list of 15 audio transformer manufacturers and their company rankings. Here are the top-ranked audio transformer companies as of June, 2025: 1.TAMURA Corporation, 2.S.G. Smallwood Inc., 3.Triad Magnetics.
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Engaged in research on nitride semiconductor growth using the MBE method at Waseda University Graduate School. After graduating from graduate school in 2016, he joined a non-ferrous metal manufacturer.
Engaged in equipment maintenance and engineering work at metal smelting plants. Moved to a chemical manufacturer in 2022. Engaging in similar tasks.
Audio transformers are transformers used to amplify sound in audio equipment.
They are generally part of the output module of an amplifier and perform the necessary conversion and filtering of the amplifier's output signal before sending it to the speakers. Many products are available that minimize the effects of noise and other electromagnetic fields.
For this reason, they are often used to transmit micro-analog signals over long distances, such as microphone signals.
Audio transformers are used to enhance audio equipment. They are used at the input of amplifier equipment and are sometimes used to amplify audio signals. Especially in single-ended amplifiers and push-pull amplifiers, the choice of audio transformer has a significant impact on sound quality.
Selecting the appropriate transformer can improve the clarity and balance of the sound. They are also used to send the amplifier's output signal to the speakers.
Audio transformers are placed between the power supply, output stage circuitry, and the speaker, and perform conversion and filtering of the output signal. They improve the efficiency and accuracy of the speaker and make the sound texture more realistic.
Audio transformers are sometimes used in amplifier circuits for filtering and impedance matching. They also contribute to signal stability and sound quality, especially in buffer amplifiers and microphone amplifiers.
A transformer is a device for transmitting electric power through a magnetic circuit, and power is transmitted through the magnetic coupling of two coils. Audio transformers are used to transmit audio signals.
In audio transformers, the audio signal is input to the input coil and the transformed signal is output from the output coil. As the audio signal passes through the input coil, it generates a magnetic flux in the coil. When this magnetic flux reaches the output coil, it is converted back into an electrical signal.
In audio transformers, the magnetic properties of the components play an important role. In particular, the quality of the transformer core material and windings affects the sound quality. Additionally, transformer windings can achieve higher-quality audio signal conversion by properly designing their inductance and capacitance.
There are various types of audio transformers, each of which is used for different applications depending on its characteristics. The following are examples of typical audio transformers:
Output transformers are used in the output stage of amplifiers to send high-voltage or high-current signals to speakers. Most transformers are large and have high output power.
These are used in the input stage of an amplifier to amplify low-level signals. They are often made of high-quality materials to ensure clear transmission of audio signals.
Connected between the input and output transformers, matching transformers provide proper impedance matching. They are used to improve signal transmission quality and reduce noise and distortion.
AC power transformers are used to supply power to amplifiers. They are installed to remove noise and other interference from the AC power supply, improving the quality of the power supplied to the amplifier.
Plug-in transformers are used for wiring audio transformers. They are typically small and inexpensive and are used in a wide range of applications.
When selecting an audio transformer, consider the application, impedance, quality, and size.
First, the type of audio transformer is selected based on the application. When selecting an output or input transformer, the transformer impedance must match the impedance of the amplifier's output and input stages.
In addition, careful attention should be paid to the quality of the selection. Selecting a product that uses high-quality materials and technology will improve sound quality.
Size and shape are also influential factors. If a smaller size is required or a special shape is needed, an appropriate transformer should be selected.
*Including some distributors, etc.
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Allied Components International was founded in 1992 and is based in Foothill Ranch, California is a manufacturer of electronic, magnetic components & modules that have applications in various industries. The company provides LAN magnetics, SMD power chip inductors, line filters, current sensing transformers, and wire-wound & air core inductors, along with multilayer & thin film inductors, standard & custom transformers, common mode chokes, RJ45 connectors, and ferrite beads. They are an ISO 9001: 2015 registered company and their products have applications in the networking, telecommunications, test equipment, and power conversion industries.
Inglot Electronics Corp., established in 1964, and headquartered in Chicago, Illinois, is a manufacturer and supplier of miniature toroids and electromagnetic components. They design and produce electromagnetic components such as miniature toroids, switch-mode magnetics, high and low-frequency power chokes, and linear transformers used in power conversion equipment, covering the power conversion spectrum from surface mounts to large isolation transformers. Their services include design engineering, paper section layer winding, and prototype testing. Inglot Electronics Corp. holds ISO 9001 certification, and also provides data reporting and barcoding, upon request.
Lenco Electronics, Inc., Since 1973, is a manufacturer custom inductors and transformers such as PCB transformers, constant voltage, autotransformers, and custom transformers. The company also provides NEMA 1 enclosures with removable panels and knockout holes to make electrical connections simple. The McHenry, Illinois-based company services the power production and distribution, electronics, telecommunications, automotive, and electronics industries, and it is a member of the Transformer Association. The business's impregnation area is equipped with three walk-in ovens for the labor-intensive curing process as well as impregnation tanks for vacuum Epoxy and varnish.
Established in 1984, Manutech, Inc. is a US-based manufacturer specializing in precision industrial machinery. The company designs and produces advanced machinery and equipment for various industries. With a foundation dating back to its establishment, Manutech, Inc. engineers solutions. Their products range from automated assembly systems to specialized manufacturing equipment, serving industries like automotive, electronics, and aerospace. Manutech, Inc.'s devotion to excellence is evident in their machinery, tailored to enhance operational efficiency. Examples include robotic assembly systems for automotive production and precision manufacturing equipment for electronics.
Pacific Transformer is a manufacturer and supplier of custom transformers and inductors. Based in California, USA, they are designing and manufacturing power transformers, isolation transformers, autotransformers, and other magnetic components for various industries. Established in 1981, they offer a wide range of products designed for applications such as power distribution, renewable energy, industrial automation, medical equipment, and more. One of their products is Inductors and Chokes, used for energy storage, filtering, and inductive load applications. They are commonly found in power supplies, audio systems, and electronic circuits.
Tried Magnetics was founded in the 1940s and is based in Perris, California. The ISO 9001:2015-certified company serves industrial equipment, renewable energy, medical equipment, and other industries as a manufacturer of components using standard and custom magnetic components including transformers, power supplies, and inductors. The company’s custom magnetics division encompasses power and audio transformers, chokes, and power supplies used across industries. The company’s engineering development kits and design sample kits include a sampling of power ranges, sizes, and packaging styles within specific product lines to assist customers in choosing final designs for prototyping.
Pico Electronics was founded in 1967 and is headquartered in Pelham, New York. Pico is a developer of miniature and ultra-miniature electronics used in aerospace, power generation, and military applications. The company specializes in miniature transformers and inductors designed to work in extreme temperature environments ranging from -55°C to +85°C (-67°F to +185°F). Pico Electronics also specializes in continued miniaturization. Other product listings include DC-DC converters, AC-DC power supplies, and power factor-corrected modules. The company also produces QPL MIL Spec products to military grade specifications such as transformers and inductors.
Coilcraft was founded in 1945 and is headquartered in Cary, Illinois. The company is a designer, manufacturer, and distributor of high-performance magnetic components for industries including automotive and computing. The company’s standard products include power devices such as inductors, RF devices, transformers, and EMI components. The company’s automotive division offers transformers, inductors, chokes, and filters operation down to -40 degrees. The company also offers design tools to help customers understand the correct product for their needs and optimum system operational parameters.
Shareway Technology Co. Ltd is a Chinese manufacturer of power over ethernet (PoE) components that was established in 1997 in Shenzhen, Guangdong. The company’s product lineup includes PoE jacks for data transmission or power supply, PoE transformers for converting input voltages, PoE LAN transformers for isolating data from power signals, and PoE LAN filters for reducing common as well as differential mode noise. The company’s products are used primarily by clients in the power supply, networking, communication, and consumer electronics industries.
S.G. Smallwood Inc. (SGS) is a Canadian contract manufacturer specializing in custom transformers and related assemblies that was established in Kitchener, Ontario in 1945. The company offers a range of specialized capabilities, including design, engineering, precision linear winding, precision toroidal winding and layer winding services. These are utilized to produce transformers, windings, inductors, and assemblies according to customer specifications. SGS mainly serves clients in the power supply, consumer electronics, audio equipment, and telecommunications sectors.
Electronic Craftsmen is a Canadian custom manufacturer specializing in inductors and transformers that was originally founded in 1956 as E Craftsmen Corporation. From their 23,000 sq ft facility in Waterloo, Ontario, the company produces various custom magnetics including power, toroidal, and flyback transformers, common and differential mode chokes, and filter inductors. These are used by clients in the renewable energy, aviation, and industrial manufacturing sectors. Electronic Craftsmen has an onsite machine shop from which it provides additional services for customer projects, such as engineering, encapsulation, prototyping, and testing.
Tamura Corporation was founded in 1924 in Tokyo, Japan as Tamura Radio Store, making it one of Japan’s oldest electronics companies. Today the company serves the semiconductor, audio consumer appliance, power distribution, and other industries as a developer and manufacturer. The company’s Electronic Component segment has eight categories, among them, transformers, reactors, vacuum tube type power supply transformers, current sensors, and AC adaptors. The company’s Information Equipment segment has 3 subcategories including broadcast studio systems, communication systems, and network systems.
Radio Design Labs was founded in 1986 and is based in Carpinteria, California, United States is a manufacturer of video & audio control modules, and application-specific modules that perform a particular electronic function or do a specific job in various industrial sectors. The company provides amplifiers, speakers, microphones, signal generators, and meters, along with crossover filters, power supplies, connector plates, and remote control systems that have applications in communication, education, healthcare, hospitality, and security sectors. They also offer automatic mixing systems, distributed audio, prioritized source selection, and switching & control services for Government, Defense, Home Theatre, and, Entertainment industries.
Hammond Manufacturing Ltd is a manufacturer of transformers, racks, and enclosures. The company is based in Guelph, Ontario, Canada since 1917. Hammond Manufacturing's range of products includes racks and cabinets, electrical and electronic enclosures, power bars, and low-voltage transformers. They also manufacture general accessories such as door clamping and mounting hardware. The company provides product customization services and technical support to electronic and electrical manufacturers, utilities, and institutions through its global network of distributors and agents.
Lundahl Transformers, established in Stockholm, Sweden, in 1958, is a manufacturer engaged in transformers for audio applications, video (CCTV) applications and pulse transformers. The company uses their own machines in the factory and software to design custom made machines for the customers. Their product range includes pro audio, audiophile equipment, video transformers and accessories. The company has distributors all around the world and their factory uses renewable energy to reduce greenhouse gases in the atmosphere.
Ranking as of June 2025
Derivation Method| Rank | Company | Click Share |
|---|---|---|
| 1 | TAMURA Corporation |
15.0%
|
| 2 | S.G. Smallwood Inc. |
9.8%
|
| 3 | Triad Magnetics |
8.3%
|
| 4 | Lenco Electronics, Inc. |
7.8%
|
| 5 | Inglot Electronics Corp. |
7.7%
|
| 6 | Manutech, Inc. |
7.2%
|
| 7 | Allied Components International |
7.0%
|
| 8 | Pacific Transformer |
6.4%
|
| 9 | Lundahl Transformers AB |
6.4%
|
| 10 | Coilcraft Inc. |
6.0%
|
Derivation Method
The ranking is calculated based on the click share within the audio transformer page as of June 2025. Click share is defined as the total number of clicks for all companies during the period divided by the number of clicks for each company.Number of Employees
Newly Established Company
Company with a History
*Including some distributors, etc.
*Including some distributors, etc.
| Country | Number of Companies | Share (%) |
|---|---|---|
|
United States of America
|
8 | 57.1% |
|
Canada
|
3 | 21.4% |
|
China
|
1 | 7.1% |
|
Japan
|
1 | 7.1% |
|
Sweden
|
1 | 7.1% |
30 products found
30 products
Kami Electronics Industry Co., Ltd.
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Ideal for intercoms and impedance matching circuits between circuits. By integrating production lines at overseas factories, we have achieved low p...
Kami Electronics Industry Co., Ltd.
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■Features This is a transformer that matches and converts the output impedance of the sending circuit and the input impedance of the receiving circ...
Sara Co., Ltd.
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■Features All of our transformers comply with the RoHS Directive.
NC Automation Co., Ltd.
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■Optional equipment compatible with TGR-2400 Single-ear type earphones with a D-shape that prevents them from falling.
Castech Shoji Co., Ltd.
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Last viewed: 17 hours ago
■Product lineup ・SMD for 2.5mmΦ ・SINK for 3.5mmΦ ・For 3.5mmΦ ・For 5mmΦ ・For 3.5mmΦ
Pulse Electronics Co., Ltd.
170+ people viewing
Last viewed: 41 minutes ago
We make custom InPut transformers and OutPut transformers for audio that handle audio frequencies. We can also manufacture input/output transformer...
WIN SOURCE ELECTRONICS
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■Summary Audio transformers are essential components for impedance matching, signal separation, and noise reduction in audio equipment. Designed to...
