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Pacific Transformer designs and manufactures a line of pre-designed guitar amp transformers that can be purchased directly through our ecommerce site, Pacific Audio Magnetics.

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INDUSTRY > AUDIO

Custom transformers for guitar amplifiers, professional audio, and broadcast equipment

We engineer custom output transformers, power transformers, chokes, impedance matching transformers, and signal-path magnetics for some of the most revered names in tube amplification and professional audio — from boutique amp builders to high-volume OEM manufacturers of mixing consoles, outboard gear, PA systems, and broadcast equipment. Our impedance matching transformers power iconic stadiums, venues, and theme parks around the world. When the signal matters, the transformer matters.

Expert Partner

Built for Tone, Wound for Life

Audio transformers aren't just power components — they define the character of the equipment they live inside. In guitar amplifiers, output transformers shape frequency response, headroom, and the dynamic feel players spend years trying to describe. In professional audio, bandwidth, phase linearity, and common-mode rejection have to be designed intentionally. Our first guitar amp transformer was designed for Ken Fischer's legendary Trainwreck amplifier, and we've been building for the industry's best ever since. For over 60 years, Pacific Transformer has wound custom magnetics for boutique amp builders, high-volume OEM manufacturers, and professional audio equipment companies — with our impedance matching transformers installed in venues from Disneyland to St. Peter's Square.

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Whether you're replicating a vintage amp design, engineering a modern high-headroom amplifier, or building studio-grade signal-path transformers, the right magnetics make the difference between a product that's good and one that's legendary. We'll design it with you — at no charge — and have a prototype in your hands in as little as 48 hours.

Experience in Audio

Pacific Transformer has been a trusted supplier to guitar amplifier manufacturers and professional audio equipment makers for decades. From point-to-point boutique amp builds to mixing consoles, PA systems, shaker systems, and broadcast equipment, we bring the same precision and care to every transformer we wind — whether it weighs 1,200 pounds or just a few grams. Our engineers understand the nuances of tube circuit design and professional signal-path requirements, and can help you match or exceed the performance of any vintage or modern reference.

45+ Years

Custom Magnetics Experience

UL, CSA & ETL

Recognized Manufacturer

48 Hours

Prototype Turnaround

No Minimum

1 to 10,000+ Units

Trusted by the Leaders

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FREQUENTLY ASKED QUESTIONS

Audio Transformer FAQs

We build output transformers, power transformers, and chokes for tube amplifiers, as well as isolation transformers, line-level input and output transformers, and balanced interface transformers for professional audio equipment — including mixing consoles, studio outboard gear, and broadcast systems.
Yes. Vintage replication is one of our specialties. Whether it’s a classic guitar amp output transformer or a discontinued studio console transformer, if you have measurements, schematics, or a reference unit, our engineers can design a transformer that matches the original’s electrical characteristics — including the subtle nuances that contribute to vintage tone or signal character.
We can engineer output transformers for virtually any primary impedance and secondary configuration, including 4, 8, and 16-ohm taps or custom impedance ratios. Whether you’re building a single-ended Class A amp or a push-pull design, we’ll design the output transformer to match your circuit’s requirements.
Yes. We design and manufacture the full magnetic complement for tube amplifiers — output transformers, power transformers, and chokes. Having a single supplier for all three simplifies sourcing and ensures that your magnetics are designed to work together.
Yes. We build input, output, and interstage transformers for balanced line-level applications, including custom impedance ratios, Faraday shields for noise rejection, and frequency response tuning for specific applications.
We work with grain-oriented silicon steel, nickel alloys, and amorphous core materials depending on the application. Core selection has a meaningful impact on low-frequency extension, distortion, and saturation behavior — we’ll recommend the right material for your design goals.
Our toroidal and custom-wound designs are built to minimize stray magnetic field emission and susceptibility. For equipment intended for use in professional studio or broadcast environments, we can design and test to meet your specific noise floor requirements.
Yes. We support everything from prototype through volume production, with consistent quality across runs. We also offer JIT inventory programs for manufacturers who want to lock in pricing and availability without carrying excess stock.
There is no minimum order. We work with customers from single prototype builds to production runs of 10,000 or more units. Whether you’re building a one-off custom amplifier or ramping into high-volume manufacturing, we can support you at any scale.
We offer 48-hour prototype turnaround times. If you’re in development and need to evaluate a transformer quickly, contact us — we can often turn around a custom prototype faster than anyone else in the industry.
We are a UL, CSA, and ETL recognized manufacturer with experience navigating CE and TUV approvals. If you’re selling amplifiers or audio equipment internationally and need certified components, we can build and document to meet those requirements.

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