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Our Services

Expert Classic Cars Installations

Our expert classic car installation services are carried out with a deep respect for originality and craftsmanship. We carefully integrate modern accessories and systems without compromising the character, value, or authenticity of your classic vehicle. Using proven techniques and meticulous attention to detail, our specialists ensure every installation is discreet, reliable, and in keeping with the era of your car—preserving its heritage while enhancing its usability.

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Trusted by clients across the UK

BEST JAGUAR XJS CLASSIC CAR AUDIO UPGRADE WE HAVE EVER DONE! With in-depth installation footage!!!

This project transformed a classic Jaguar XJS with a carefully selected range of modern audio and technology upgrades. Enhancements include a Pioneer 9-inch touchscreen with reverse camera integration, an Audison Forza DSP amplifier for precision-tuned sound, an Eton under-dash subwoofer delivering deep bass without sacrificing space, and premium Morel speakers for exceptional audio clarity. The result is a perfect blend of timeless elegance and contemporary technology, elevating both driving enjoyment and sound quality.

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Ultimate Protection for Your Classic Car! | Aston Martin Volante with Clifford Alarm

This timeless Aston Martin Volante was upgraded with a Clifford 650 Mk3 alarm system, delivering modern security tailored for classic and high-value vehicles. The installation provides top-tier protection while preserving the car’s originality and wiring integrity, ensuring a discreet, professional finish with minimal intrusion. A perfect balance of peace of mind and authenticity, designed to protect a true automotive icon.

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Frequently Asked Questions

Will upgrading the audio ruin the originality of my classic car?

No. We specialise in OEM-style, reversible installations with no permanent cutting or damage. Wherever possible, factory trims and panels are retained so the vehicle can be returned to original specification.

Yes. The original radio can be kept for appearance while we discreetly add Bluetooth, Apple CarPlay, DAB radio, USB charging, and improved sound quality, all hidden from view.

Absolutely. Speakers, amplifiers, and even subwoofers can be completely concealed using factory locations or custom solutions trimmed to match the interior for a true OEM+ finish.

Yes. We use low-draw components and correct power management designed for older electrical systems, ensuring reliability without draining the battery or overloading the car.

When done professionally, no. Discreet, reversible upgrades improve usability while preserving originality. Poor installations reduce value — specialist work protects it.

Your Car Upgrade Specialist Since 1977

Founded in Reading in 1977, John Kleis Audio has been a trusted name in in-car entertainment for nearly five decades. From the early days of cassette players to today’s cutting-edge digital upgrades, the company has built its reputation on quality, reliability, and expert installation.

Still family-run and based on Basingstoke Road, John Kleis Audio continues to lead the way in premium audio, vehicle security, and custom car technology — delivering precision, innovation, and service you can trust.

Decades of Expertise

With over 45 years in the industry, we’ve set the standard for in-car entertainment and vehicle technology since 1977.

Quality You Can Trust

We’re known for precision installations, reliable products, and exceptional customer service that’s earned us a loyal following across the Thames Valley.

Innovation & Training

Our team stays ahead of the curve, constantly updating skills and equipment to bring you the latest in-car audio, tech, and security solutions.

Award-Winning Service

As a FOUR MASTERS authorised dealer and ICE Award winner, we deliver professional results backed by proven recognition in our field.