Match MW 8BMW-D

Match MW 8BMW-D – flat 8″ dual-voice-coil under-seat subwoofers for BMW

The Match MW 8BMW-D is a MATCH bass upgrade for BMW owners dissatisfied with their factory low end, and equally a tool for installers who need extremely space-saving subwoofer solutions. The pair fits the original under-seat mounting positions of all BMW model ranges with under-seat subwoofers.

BMW-specific baskets and plug-and-play connectors make installation fast. The very shallow mounting depth enables compact sealed enclosures in universal applications, and the large 42.5 mm voice coil supports high power handling. A special feature is the flexible wiring: gold-plated screw terminals let the woofer be run as 1 x 4 Ω with the metal bridge fitted, or with both 2 Ω voice coils driven independently, a configuration suited to MATCH Plug & Play amplifiers.

Key Features

• Direct fit for BMW: mounts in the original under-seat positions of all BMW model ranges with under-seat subwoofers.
• Plug-and-play connection: plug connectors for the original BMW harness are included.
• Very low mounting depth: 40 mm, for shallow designs and under-seat installation.
• Compact sealed enclosures: works in sealed boxes from 3 L net volume.
• 42.5 mm voice coil: for high power handling.
• Dual voice coil, 2 x 2 Ω: flexible wiring options per woofer.
• Switch it parallel: 1 x 4 Ω with the metal bridge on the gold-plated terminals, or 2 x 2 Ω with independently driven coils without it.
• Hand-scooped paper cone: 214 cm² cone area.
• Universal use: also suited to ultra-flat subwoofer builds outside BMW applications.

Drivers & Construction

Each woofer combines a hand-scooped paper cone (214 cm² cone area) with a 42.5 mm voice coil of 12.5 mm winding height and two 2 Ω windings. The connector carries gold-plated screw terminals with a removable metal bridge for parallel wiring.

Acoustic Performance

• Power handling: 200 W RMS / 400 W max.
• Impedance: 2 x 2 Ω (1 x 4 Ω with metal bridge); DC resistance Re 3.4 Ω
• Sensitivity: 90 dB (1 W / 1 m)
• Resonance frequency Fs: 46 Hz
• Q factors: Qms 4.45, Qes 0.59, Qts 0.52
• Vas: 17.3 L; Cms 272 µm/N
• Force factor Bl: 8.6 Tm
• Moving mass Mms: 44.2 g; mechanical resistance Rms 0.74 kg/s
• Max. linear excursion Xmax: ±4.0 mm

Installation Notes

• Dimensions: outer diameter 239 mm (9.41″), installation diameter 175 mm (6.89″), installation depth 40 mm (1.57″).
• Vehicle fit: all BMW model ranges with under-seat subwoofers (see the manufacturer’s compatibility chart).
• Sealed enclosure: 3 L net, -3 dB at 63 Hz; suggested DSP: high-pass Butterworth 12 dB/oct at 40 Hz, EQ at 90 Hz (Q 3.0, -4 dB), low-pass Butterworth 24 dB/oct at 80–100 Hz.
• Vented enclosure, one woofer: 12 L net, port ø 60 mm (28 cm²), length 25 cm, tuned to 46 Hz, -3 dB at 45 Hz.
• Vented enclosure, two woofers: 24 L net, port ø 80 mm (50 cm²), length 20 cm, tuned to 46 Hz, -3 dB at 45 Hz.
• Vented DSP settings: high-pass self-defined at 40 Hz (Q 1.3), EQ at 67 Hz (Q 3.0, -3 dB), low-pass Butterworth 24 dB/oct at 80–100 Hz.
• Amplification: independent voice-coil drive suits MATCH Plug & Play amplifiers.

Technical Specifications

Scope of Delivery

2 x Subwoofer MATCH MW 8BMW-D
2 x Plug connector for original BMW cable harness
1 x Instruction manual