The ZDBMW4CS, plug-and-play speaker system engineered specifically for BMW vehicles.

Experience premium sound quality and seamless installation with the Phoenix Gold ZDBMW4CS, a plug-and-play speaker system engineered specifically for BMW vehicles. Designed with sound performance and installation versatility in mind, this kit redefines what a simple upgrade can do.

Engineered for Clarity and Control

The 4” midrange driver features an aluminium cone, chosen for its ability to deliver tight, punchy midbass and clear midrange tone reproduction – perfectly suited to bring vocals and instruments to life with accuracy and fun energy.

The 1” tweeter uses a silk dome to produce soft, smooth high frequencies, offering a refined, natural top end that enhances detail without harshness.

A dedicated 2-way crossover ensures each driver performs at its best, maintaining tonal balance and seamless integration between the midrange, tweeter and vehicle.

Smart Bass Blocker Function

In BMWs with the factory Basic Sound System, the underseat woofers and door speakers share the same signal. This means the small 4" door speakers are forced to play deep bass tones they weren’t made for — often causing distortion and muddy sound.

The ZDBMW4CS includes an integrated Bass Blocker loop that filters out those low frequencies below 120Hz (-12dB/Oct). By doing this, it stops unwanted bass from reaching the midrange speakers, allowing them to play louder, clearer, and more accurately. The bass is then handled properly by the under-seat woofers, providing a balanced, distortion-free sound.

Precision Engineering Meets Plug & Play Simplicity

The ZDBMW4CS features a dual aluminium mounting bracket system, built for maximum rigidity and zero unwanted vibrations. Its innovative design ensures a perfect fit across multiple BMW configurations, regardless of which of the two OEM brackets your vehicle uses.