About Voltage Cable Co.

Founded in 2021 by Thomas Welladsen, Voltage Cable Co.® was born out of a deep love for guitar tone, design, and innovation.

Handmade in Sydney, Australia, our cables are built by qualified technicians using only the finest components and backed by our proprietary, patented ISO-COAT® hermetic seal.

As a family-owned, small-batch operation, every cable is stripped, soldered, sealed, tested, and packaged in-house at our workshop in Windsor, NSW.

Voltage Cable Co. Pete ISO-COAT

The Birth of a New Standard.

Voltage Cable Co. wasn’t built overnight. It was forged through local demand, years of experience playing guitar, building cables, and working with valve amplifiers.

Our team of qualified technicians have over 45 years of experience on the bench modifying, repairing and manufacturing boutique valve guitar amplifiers.

All of these key ingredients, along with our time working in guitar stores and with touring artists, has ignited a no-compromise philosophy towards manufacturing the best guitar cables we can.

One of the biggest issues we kept encountering over the years beyond amplifier failures, was bad cables.

A new type of cable was needed, a standard of durability and quality that takes musicians a step forward.

Voltage Cable Co

Our Stake in the Ground.

From the beginning, we set out to redefine what a cable should be. Not just great sounding, but built to a standard of durability like no other.


Durability isn’t a feature. It’s the standard.

We made a promise to never ship anything we wouldn’t use on stage ourselves. That means no weak solder points, no shortcuts, and no compromising on quality.

Every Voltage cable is handmade in Sydney by expert techs using premium components like Cardas silver solder, high quality nickel plugs and OFC copper. Each one is tested ruthlessly before it leaves the shop. All solder terminations are oxygen free and structurally sound across every cable.

But quality parts alone doesn't stop cable failure or signal loss. That’s why we went further.


For the last four years, my team and I have been working tirelessly. Diagnosing, developing, testing, and pushing towards an answer to the decades-old problem we all know:

Cable failure.

Introducing ISO-COAT®

THE FIRST AND ONLY PATENTED HERMETIC SEAL FOR INSTRUMENT CABLES.

With over 45 years of experience on the bench, in the studio, and on stage, my team and I have seen every type of cable failure possible. Staying true to our no-compromise approach, we created ISO-COAT®. A patented, world-first method designed to eliminate cable failure at its source.

ISO-COAT® is not a material or basic coating. It’s a manufacturing process that hermetically seals the entire cable assembly, achieving an airtight barrier that guards your cable from the inside out.

It protects the solder terminations and copper internals from oxidation, corrosion, and environmental attack. In our research and development stage, we found that corrosion even creeps up into the cable’s copper over time, slowly degrading from end to end.

If this chemical reaction isn’t stopped, it’s only a matter of time before your signal degrades and cable fails. These are the main causes of dead cables and tone loss in our industry.


ISO-COAT® is now protected by

- Australian Standard Patent No. 2024204464

- International Patent Pending Application No. PCT/AU2024/050220


Every cable we ship from our Sydney workshop now includes ISO-COAT® protection. Each one carries a hand-stamped wax seal authenticity card as a physical mark symbolising our guarantee and innovation.

We can proudly say this is our stake in the ground as a boutique Australian company stepping up to deliver musicians of the world a product that actually does what it says on the box.

Voltage Cable Co. is grateful to be the innovator in this space. The first company to set a new standard and build the most durable guitar cables out there, backed by a granted standard patent.

For guitarists who demand lifetime durability, Voltage Cable Co. is here to provide that small but crucial link between the artist and the expression.

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Every company wants return customers. We want lifetime players, using our lifetime products.

Proudly handmade in Sydney, Australia.

Designed to be played, built for a lifetime®