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Voice Coils

IQS Directory provides a comprehensive list of voice coil manufacturers and suppliers. Use our website to review and source top voice coil manufacturers with roll over ads and detailed product descriptions. Find voice coil companies that can design, engineer, and manufacture voice coils to your companies specifications. Then contact the voice coil companies through our quick and easy request for quote form. Website links, company profile, locations, phone, product videos and product information is provided for each company. Access customer reviews and keep up to date with product news articles.

  • Sag Harbor, NY 800-724-5952

    We are proud of the craftsmanship of our engineers. All of our products are made right here in the United States and we promise that these items are created from high quality resources. Our electrical coils are unique and efficient. We are dedicated to manufacturing the best coils around. Our teams utilize sophisticated to procedures to develop these top notch electrical coils. Give us a call today to learn more information!

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  • Antigo, WI 800-826-9741

    Johnson Electric Coil Company is a family owned manufacturer that specializes in custom transformers, coils and inductors. From three phase isolation transformers to single phase inductors and chokes, we carefully design our products to meet your exact specifications. Our experienced engineers are available to assist during every step of the process. Let Johnson make great parts for you!

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  • Bristol, CT 860-584-0927

    We are an ISO 9001:2015 certified company which is internationally known for manufacturing high quality electromagnetic-coils. It is our goal to provide quality products, a commitment to speedy delivery, and competitive pricing. We understand that every application is unique, so we encourage you to contact us to discuss your specific requirements. Call us at 1-860-584-0927 and find out what our 50+ years of experience can do for you.

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  • Ormond Beach, FL 386-671-7406

    Where others have failed, Standard Technology overcomes the most difficult design challenges for custom electric coils, solenoids, sensors and electromagnets. With years of experience, full engineering consulting services and in-house machine capabilities, we meet clients’ exact needs, from AC/DC coils to coil assemblies. We have produced encapsulated and over-molded coils for many industries.

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  • Binghamton, NY 800-224-4477

    Endicott Coil Company is an expert manufacturer of an impressive range of coils. Created in wire gages of 4 AWG – 50 AWG with insulation capacities up to 220 degrees, our coil assortment consists of molded coils, custom coils, self-supported coils, encapsulated coils, inductors & ferrite core coils. As a leading electric coil manufacturer, ECC’s products are used in a wide range of applications.

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  • Yardville, NJ 609-585-6600

    We are a dedicated manufacturer of electric coils and you will not be upset with the capabilities of our teams. All of our high performance devices are competitively priced and we can design any coil to match your unique requirements. We are a focused supplier for OEM, military, precipitator and air pollution control industries. Please give one of our representatives a call today to learn more information!

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  • More Voice Coils Companies

businessIndustry Information

Consisting of a winding, a collar and a bobbin, a voice coil is a kind of electric coil. It attaches to the apex of a loudspeaker cone, where its purpose is to help it magnify sound. 


To work, the loudspeaker system runs a current through the voice coil, which creates a magnetic field. Inside this magnetic field, the voice coil attracts a permanent magnet permanently attached to a loudspeaker cone. In response to this attractive, the magnet moves, bringing the cone and its audio waveform with it. Once it applies its audio waveform to the coil, the cone reproduces sound pressure waves that correspond to the original input signal. 


When designing voice coils, manufacturers seek to make sure they are as lightweight as possible, with the lowest mass possible (too much inertia makes it hard to accurately reproduce high frequency sounds). Often, they encase them in housings to create actuating (movement controlling) parts that help protect them. Nevertheless, because voice coils must be so lightweight and small, they are quite delicate, and users must take care to not pass more power through them than for what they’re designed. Pairing excessive input power with low frequencies risks causing the coil to knock around and become distorted.


The windings, or electromagnetic coil portion, of voice coils are made from a conductive metal like aluminum. Manufacturers can customize voice coils in a number of ways, including by: size, housing type, speed, force, etc. To vary their properties and the areas in which the coils can work, manufacturers customize wire type. For example, ribbon-wire (flattened wire) creates a coil with a high packing density in magnetic gaps. A coil made from round wire, on the other hand, has a low packing density. To immerse voice coils in a ferrofluid, manufacturers can surface seal the bobbin and collar materials. This helps cool the coil by conducting heat away from it and into the magnet structure.


Voice coils come in two main varieties: overhung and underhung. The difference between the two is in how they’re immersed into the magnetic field.


Overhung

Overhung voice coils are taller than the magnetic gap. These coils feature a higher mass, and have correspondingly low to medium sensitivity. If and when the coil exceeds its limits, it displays soft nonlinearity. (Nonlinearity is when the output signal strength does not change in direct proportion to the input signal strength. Too much nonlinearity compromises the quality of the loudspeaker.)


Underhung

Underhung voice coils are shorter than the magnetic gap. With a low coil mass, they display a medium to high level of sensitivity. For that reason, they’re mostly installed in high-end speakers. Unlike overhung voice coils, if and when they exceed their limits, they respond with hard nonlinearity.


To learn more about voice coils, check out our manufacturing association pages, which are great resources when you’re researching about the industry. When you’re ready to make a purchase, visit the pages of one or more of those many exceptional coil suppliers with whom we partner.