Brax MATRIX ML165 PRO

Brax MATRIX ML165 PRO – 165 mm High-End Woofer

The ML165 PRO is the 6.5″ woofer of the BRAX MATRIX series and the next evolution of the MATRIX ML6 D, long regarded as a high-end reference for natural music reproduction. With a refined technical design and updated materials, it is developed for even better midbass performance in uncompromising front systems.

Its carbon fleece multilayer cone, developed with specialist Dr. Kurt Müller, joins high stiffness with low mass. A copper cap on the pole core generates eddy currents that damp magnetic field fluctuations, lowering voice coil inductance and linearising the impedance at higher frequencies – which BRAX says reduces distortion and improves efficiency and naturalness in the upper range.

Key Features

• Carbon fleece multilayer cone: high stiffness-to-weight ratio and reduced resonances; developed with Dr. Kurt Müller.
• Reinforcement collar and straight cone geometry: rear collar at the surround transition increases torsional stiffness at high excursion; straight geometry at the former improves power transfer and radiation control.
• Copper cap on the pole core: reduces voice coil inductance, linearises high-frequency impedance and lowers distortion.
• Hemispherical dust cap: tuned for upper-midrange response and detail resolution.
• Precision-machined magnet system: stable, symmetrical flux for impulse accuracy, dynamics and low-frequency performance.
• Vented pole core and spider: better airflow and less compression at high SPL.
• Aerodynamic die-cast aluminium basket: improves voice coil ventilation, reduces turbulence and keeps thermal behaviour stable.
• Butyl rubber surround: designed for maximum linear excursion with minimal distortion and precise centring at full stroke.
• Nomex spider: dimensionally stable meta-aramid fabric for long-term centring and durability.
• 24-carat gold-plated terminals: for conductivity and signal integrity.
• Refined design: silk-matte cone, matt black powder-coated aluminium basket and golden accent ring around the dust cap.
• Made in Germany: individual serial number registered in a BRAX database; supplied in a tailor-made wooden box.

Drivers & Construction

The ML165 PRO uses a 37 mm (1.5″) voice coil with a 14 mm winding height in a precision-machined magnet system with copper-capped, vented pole core. The carbon fleece multilayer cone (Sd 137 cm², Mms 19.1 g) carries a hemispherical dust cap and is suspended by a butyl rubber surround and a Nomex spider in a powder-coated die-cast aluminium basket.

Acoustic Performance

• Power handling: 120 W RMS / 170 W max.
• Impedance: 4 Ohms (DC resistance 3.4 Ohms).
• Frequency response: 40–4,000 Hz.
• Sensitivity: 91 dB @ 2.83 V / 1 m; 88 dB @ 1 W / 1 m.
• T/S parameters: Fs 48 Hz, Qms 6.80, Qes 0.50, Qts 0.47, Vas 14.6 L, Cms 560 µm/N, BxL 6.3 Tm, Rms 0.87 kg/s.
• Excursion: Xlin ±4.0 mm, Xmax (mechanical) ±8.0 mm.

Installation Notes

Outer diameter is 167 mm (6.5″), installation diameter 143 mm (5.6″) and installation depth 64 mm (2.5″). A drill and stainless steel screws are included. BRAX recommends:

• Infinite baffle: high-pass at 50 Hz, 24 dB/oct. Linkwitz-Riley.
• Sealed box: 13 L net volume, lower limiting frequency (-3 dB) 71 Hz, high-pass at 65 Hz, 24 dB/oct. Linkwitz-Riley.

Technical Specifications

Scope of Delivery

2 x High-End Woofer BRAX MATRIX ML165 PRO
1 x Drill
1 x Stainless steel screws
1 x Certificate
1 x Data sheet