Porsche Puts a Gallium Nitride Chip Inside the Burmester Subwoofer Amplifier: 400 Watts, a Heat Sink About 20% Lighter, and a 2027 Production Debut

Porsche last week announced what it calls the world's first production-ready use of gallium nitride (GaN) semiconductors in a high-end automotive audio system, targeting a single but consequential part of its Burmester 3D High-End Surround Sound System: the voltage conversion stage of the 400-watt subwoofer amplifier. The announcement, made via Porsche Newsroom on 21 August 2026, has since been picked up by trade outlets including audioXpress, ecoustics, What Hi-Fi? and Motor1, and it's notable less for any claim about sound quality than for putting hard engineering figures behind a technology that's increasingly showing up in home audio gear too.

It's worth being precise about what's actually changing, because it's easy to overstate. Porsche is not fitting a "GaN amplifier" in the sense of swapping out the amplifier's output devices. The GaN chip is doing voltage conversion — a specific stage within the 400-watt subwoofer amplifier's power supply — while the rest of the amplifier design is untouched. Porsche describes this as the first production-ready high-end automotive system built around GaN semiconductors, but that's the company's own characterisation, not an independently verified industry first.

Why voltage conversion, and why GaN

Gallium nitride semiconductors convert power more efficiently than conventional silicon parts, losing less energy as heat in the process. That matters because heat is the main design constraint on an amplifier's cooling hardware: less heat generated means the heat sink and other cooling components don't need to work as hard, and can therefore be made smaller and lighter. Porsche says the heat sink in this application can be made about 20 percent lighter as a result, a figure audioXpress independently reports in the same terms. Porsche also says the passive components around the conversion stage — capacitors and inductors — can shrink too. ecoustics adds that using less aluminium in the heat sink also trims the energy required to produce it in the first place.

audioXpress frames the broader engineering logic: GaN devices can switch at higher frequencies with lower switching losses than comparable silicon parts, which is what allows higher power density in a smaller, lighter package. None of the sources claim this translates into better sound. The stated benefits here are efficiency, heat management, weight and packaging — not audio performance — and Into The HiFi has found no claim in Porsche's materials or the trade coverage that GaN makes the subwoofer, or the system around it, sound any different.

From lab to prototype: the "Driven by GaN" project

Porsche says the work began in mid-2023. By spring 2024, the company had assembled a development team working with the University of Stuttgart's Institute for Robust Power Semiconductor Systems, and together they built the first GaN-based subwoofer amplifier prototype. The University of Stuttgart co-developed that prototype alongside Porsche rather than creating the chip independently. ecoustics reports that Porsche also brought in an unnamed international semiconductor manufacturer and an audio development partner to help take the design toward production. Internally, Porsche has been calling the effort "Driven by GaN," and the company says it has filed several patent applications covering the work.

Two named Porsche figures are quoted in the announcement. Steffen Burosch said: "Sound in a Porsche is about pure emotion. By using GaN, we can enhance that experience even further." Dr. Lars Heuken added: "The potential is huge - and this is just the beginning. GaN is ideal wherever power is converted." Both quotes point toward GaN's applicability beyond this one amplifier stage, though neither source names any other planned application.

Timeline and the system it's going into

Porsche says the GaN-equipped amplifier is scheduled to reach series production in 2027, fitted to a future Porsche vehicle. The company has not named which model will get it first.

The Burmester 3D High-End Surround Sound System that houses this amplifier is, as currently sold, a substantial piece of hardware: 21 speakers and 21 amplifier channels, with total output quoted between 1,455 and 1,470 watts depending on the vehicle, and support for Dolby Atmos. The 400-watt subwoofer channel is the one getting the GaN voltage-conversion treatment. As a concrete example, ecoustics cites the electric Porsche Macan's optional Burmester system at 21 speakers, 21 channels, 1,470 watts total and a 400-watt subwoofer, offered as a $6,010 option on that vehicle specifically — a figure that applies to the current Macan system, not to any future GaN version, whose pricing hasn't been disclosed.

Why it matters beyond the car

GaN switching devices have been turning up in home hi-fi amplifiers for a few years now, generally pitched on the same efficiency and size arguments Porsche is making here. What's different about this announcement is the specificity: a mainstream manufacturer attaching an actual number — roughly 20 percent lighter cooling hardware — to a GaN implementation, backed by a multi-year development program with an academic partner. Nothing in the sourcing here indicates that any home audio brand is changing its approach as a result of Porsche's work, and there's no claim that GaN car-audio amplifiers will filter down into home products. But the underlying physics — lower switching losses, higher power density, smaller passive components — is the same case GaN home amplifier makers have been making, and Porsche's figures give that case a rare production-scale data point to point to.

Frequently asked questions

What part of the Burmester subwoofer amplifier does Porsche's GaN chip actually replace?

Porsche's gallium nitride chip is used only in the voltage conversion stage of the 400-watt subwoofer amplifier within the Burmester 3D High-End Surround Sound System. It is not the amplifier's output stage and does not replace the whole amplifier — the rest of the amplifier design remains conventional.

How much lighter does Porsche say the heat sink becomes with GaN?

Porsche says the heat sink for the subwoofer amplifier can be made about 20 percent lighter in this application, because GaN semiconductors convert power more efficiently than silicon and generate less heat, reducing the cooling hardware needed. audioXpress reports the same approximate figure.

When will Porsche's GaN-based amplifier reach production?

Porsche says the GaN-equipped subwoofer amplifier is scheduled to reach series production in 2027, fitted to a future Porsche vehicle. Porsche has not named which model will be first to receive it.

Who did Porsche work with to develop the GaN subwoofer amplifier?

Porsche assembled a development team in spring 2024 with the University of Stuttgart's Institute for Robust Power Semiconductor Systems to build the first GaN-based subwoofer amplifier prototype. ecoustics also reports that Porsche worked with an unnamed international semiconductor manufacturer and an audio development partner on the production design.

Does the GaN chip make the Burmester system sound better?

No source describing Porsche's announcement claims the GaN chip improves sound quality. The stated benefits are limited to power conversion efficiency, reduced heat generation, and the resulting ability to make the heat sink and passive components smaller and lighter.

This article was written by an AI system from Into The HiFi AI Desk, generated from the following sources, with no human editing pass before publication: Porsche Newsroom — "From lab to listening experience: Porsche introduces Gallium Nitride Technology for high-end audio", audioXpress — "Porsche and Burmester Introduce Gallium Nitride for High-End Audio", ecoustics — "Porsche and Burmester Bring GaN Technology to High-End Car Audio for 2027", Motor1 — "Porsche's Next Audio Upgrade Uses Gallium Nitride Tech".