STEG Direct Fit BM4 – Two-Way 4" Car Audio Coaxial Speaker Set

Upgrade your BMW sound system with the STEG Direct Fit BM4, a 4” 2-way coaxial speaker set engineered in Italy for seamless OEM integration and authentic hi-fi clarity. Designed specifically for BMW factory locations, this Plug & Play system delivers a dramatic improvement in precision, depth, and tonal balance — all while maintaining your car’s original interior and wiring.

Key Features

• 4" 2-Way Coaxial System – Integrated midrange and tweeter for balanced, dynamic sound
• Power Handling: 40W RMS / 80W Max
• Frequency Response: 80 Hz – 23,000 Hz
• Sensitivity: 89.5 dB | Impedance: 3.5 Ω
• Premium Materials – Aluminium-magnesium cone, rubber surround, and neodymium magnet
• Plug & Play Fitment – Designed for BMW OEM mounting points, no cutting or rewiring required
• Compact & Efficient Design – Perfect match for factory head units or DSP amplifiers
• Made in Italy – Crafted for long-lasting performance and acoustic refinement

Precision Italian Engineering

The STEG BM4 represents the perfect harmony between performance and practicality. Built under STEG’s Direct Fitphilosophy, it combines compact design with exceptional musical accuracy.
Each driver features a lightweight aluminium-magnesium cone for responsiveness, a rubber surround for control and durability, and a neodymium magnet for high efficiency in tight OEM spaces.

This system reproduces midrange tones with warmth and presence, while the integrated tweeter adds brightness and clarity to vocals and instruments — transforming your BMW interior into a high-fidelity sound environment.

📦 Available for shipping Australia-wide or expert installation at MC Audio Sydney.