Mercedes-Benz S-Class W222 Audio Upgrade Review & Cost

Elevating the Mercedes-Benz S-Class W222 Audio Experience

The Mercedes-Benz S-Class W222 is the epitome of luxury and automotive engineering, but even its premium cabin can benefit from a significant audio upgrade. For owners who cherish their music on the road, the factory sound system might feel restrictive. This review details a comprehensive car audio upgrade for a W222 S350, focusing on enhancing clarity, bass response, and overall sonic immersion. The goal is to transform the driving experience by delivering a soundstage that matches the vehicle's sophisticated ambiance. This project was completed in Busan, South Korea, and provides a clear roadmap for S-Class owners seeking a superior auditory journey.

Key Components and Installation Process

A successful sound system upgrade involves carefully selected components and meticulous installation. For this Mercedes-Benz S-Class W222, the chosen components included the Musway D8 DSP amplifier, PHASS PE88P midrange/tweeter units, and PHASS PE170PL 7-inch woofers. These parts were selected for their compatibility and ability to outperform the original equipment.

Installation process:

1. Component Replacement: The factory midrange and tweeter speakers in the front doors were replaced with the PHASS PE88P units. These offer a wider frequency response (110Hz-24.5kHz) and superior build quality compared to the stock speakers, which often use lighter, cost-saving materials. The installation utilized Plug and Play (PNP) connectors, ensuring no modification to the vehicle's original wiring harness, thus preserving the factory electrical system integrity. The rear doors received similar treatment, including the replacement of electric Burmester tweeters for a consistent audio experience across all seats.
2. Woofer Upgrade: The original woofers, typically located in the legroom areas, often lack the necessary power and depth. The PHASS PE170PL 7-inch woofers were installed in the factory locations to significantly improve low-frequency reproduction (down to 50Hz), adding crucial impact to music and movie soundtracks.
3. Sound Deadening: Crucial for optimal speaker performance, sound deadening material was applied to the interior of all doors. This process minimizes panel vibrations, preventing sound coloration and ensuring that the new speakers deliver clear, tight bass without distortion.
4. DSP Amplifier Installation & Tuning: The Musway D8 DSP amplifier was installed in an optimal location, often under the trunk floor, ensuring proper heat dissipation and vibration isolation. This amplifier integrates seamlessly with the Mercedes-Benz electrical system via PNP connections. The most critical step is the precision tuning using acoustic measurement tools and expert listening. This involves calibrating channel levels, delay, and crossover frequencies to match the unique acoustic environment of the S-Class cabin, ensuring a balanced and natural sound profile.

Before & After: The Sonic Transformation

The difference between the stock and upgraded audio system is profound. Before the upgrade, the S-Class W222's audio was described as 'stifled' and lacking low-end impact. After the installation of the PHASS speakers and Musway amplifier, the soundstage opened up dramatically. Music became clearer, with distinct separation of instruments and vocals. The low-frequency response from the new woofers provided a rich, resonant bass that was previously absent, adding a palpable sense of depth and energy. The precision tuning ensured that the entire system worked harmoniously, creating an immersive listening environment that complements the luxury of the S-Class. The entire process, including component selection, installation, sound deadening, and final tuning, took approximately 5 hours.

Durability, Maintenance, and Investment Value

High-quality audio components like those installed are built for longevity, typically lasting over 10 years. However, periodic checks of cable connections and amplifier capacitors (around the 10-15 year mark) are recommended depending on environmental factors. To maintain optimal sound quality, a re-tuning of the DSP system annually is advised. The investment for a full audio upgrade of this caliber, including speakers, amplifier, sound deadening, and professional tuning, generally ranges from 3 to 5 million Korean Won (approximately $2,200 - $3,700 USD, though the initial estimate was $1,500+). While a significant investment, it substantially enhances the vehicle's value and the owner's daily driving pleasure, making it a worthwhile upgrade for discerning audiophiles.