Brax MATRIX ML8 SUB

Brax MATRIX ML8 SUB – 8″ High-End Subwoofer

The ML8 SUB adds a subwoofer to the BRAX MATRIX loudspeaker series and is developed and built with the same uncompromising approach as the other BRAX speakers. It is designed to reproduce deep bass with precision and control even in the smallest possible enclosures, and to turn large amounts of amplifier power into sound pressure without compression.

The key technology is the MicroSphere coating on the paper cone: ceramic micro hollow spheres of about 75 µm diameter embedded in a polymer layer. According to BRAX, this unites two normally conflicting requirements – high cone stiffness and high internal damping – for precise, accurate bass.

Key Features

• MicroSphere-coated paper cone: stiff, hand-scooped cone with high internal damping for excellent impulse response.
• Dual voice coil 2 x 2 Ohms: 50 mm (2.0″) voice coil with a tall 26.4 mm winding height for long linear excursion and low distortion.
• Long linear stroke: Xmax ±9.2 mm.
• High power handling: 400 W RMS / 800 W max.
• Small-enclosure design: deep bass from sealed boxes of only 10–17 L net volume.
• Shaped rubber surround: enables long linear cone excursion.
• Effective ventilation: large mesh-protected openings in the T-yoke and basket cool the voice coil and reduce compression.
• Solid die-cast aluminium basket: aerodynamically optimised.
• Precision magnet system: powerful, precisely machined motor for high magnetic flux linearity.
• Large push terminals: accept heavy-gauge speaker cable.
• Optional MR8 ring: stainless steel ring usable as mounting ring or grille fixing, depending on installation position.
• Serial-numbered: recorded in a service database and supplied in a wooden box with certificate.

Drivers & Construction

The ML8 SUB uses a 50 mm (2.0″) dual voice coil (2 x 2 Ohms, DC resistance 2 x 1.9 Ohms) with 26.4 mm winding height. The MicroSphere-coated paper cone has an effective area (Sd) of 219 cm² and a moving mass (Mms) of 83 g, suspended by a shaped rubber surround in an aerodynamic die-cast aluminium basket. Large mesh-covered vents in the T-yoke and basket keep the voice coil cool.

Acoustic Performance

• Power handling: 400 W RMS / 800 W max.
• Impedance: 2 x 2 Ohms (DVC).
• Efficiency: 85 dB SPL @ 1 W / 1 m.
• T/S parameters: Fs 32 Hz, Qms 9.63, Qes 0.60, Qts 0.56, Vas 22 L, Cms 323 µm/N, BxL 10.3 Tm, Rms 1.67 kg/s.
• Max. linear excursion: ±9.2 mm.

Installation Notes

Outer diameter is 222 mm (8.7″), installation diameter 191 mm (7.5″) and installation depth 95.6 mm (3.8″). BRAX specifies sealed enclosures only (no vented-box data is given):

• Optimal sealed box: 17 L net, lower limiting frequency (-3 dB) 43 Hz.
• Minimal sealed box: 10 L net, lower limiting frequency (-3 dB) 48 Hz.
• DSP high-pass: 32 Hz, characteristic “Self-define”, Q-factor 1.0.
• Damping material: net volumes refer to empty enclosures; completely (not tightly) filling the box reduces the required volume by up to 5 % with polyester wadding, up to 10 % with mineral/rock wool and up to 20 % with sheep wool.
• Vented boxes: damping reduces port effectiveness, so BRAX advises against damping material in vented enclosures used only up to 150 Hz.

Technical Specifications

Our specifications for the net volume of sealed enclosures always refer to unfilled cabinets without any damping material inside. The net volumes can be reduced if the cabinet will be filled completely (not stuffed) with suitable materials. The following materials can be used for this purpose:

• polyester wadding achieves a volume reduction of up to 5%
• mineral wool or rock wool achieves a volume reduction of up to 10%
• sheep wool achieves a volume reduction of up to 20% come

Note:
Damping of vented enclosure (as long as they are solely used in the frequency range up to 150 Hz) is counterproductive because the damping material generally reduces the effectiveness of the bassreflex port.

Scope of Delivery

1 x High-End Subwoofer BRAX MATRIX ML8 SUB
1 x Certificate
1 x Data sheet