It all started with the vision of music lover and company founder Heinz Fischer to be the first to bring exceptional audio experience of legendary high-end hi-fi components into the car. Uncompromising in design, technology and sound. True to these fundamental principles, the focus in the development of our BRAX GRAPHIC loudspeaker series is on pure, unaltered music reproduction, consistently realized by the latest technologies and highest-quality materials – of course designed and made in Germany.

MicroSphere – the material for maximum acoustic precision 

The unique "MicroSphere" coating of the 165 mm / 6.5" high-end GRAPHIC GL6 MK2 mid woofers ensures outstanding sonic performance. With this patented technology, ceramic micro hollow spheres with a diameter of only 75 µm are embedded in a polymer layer and applied to the cone. This special coating guarantees perfect inner damping without negatively affecting the diaphragm weight. Instead, the innovative treatment increases the stiffness of the hand-scooped cone and allows this exceptional speaker to perform even more dynamically and accentuated.

Perfection – redefined

BRAX would not live up to its claim if our striving for perfection did not result in constant improvements to details. The GL6 MK2 comes with a new dust cap made of particularly soft polyurethane that ensures an even more balanced frequency response in the midrange and thus maximum tonal neutrality.

Even the smallest detail counts

All components of the GL6 MK2 reflect the BRAX philosophy without anyexception. The extremely stable die-cast aluminum basket signals unshakeable solidity, whereas the highly precisely manufactured magnet system in conjunction with the 37 mm, 3 Ohms voice coil not only offers ideal Thiele/Small parameters for the best possible impulse response, but also warrants high efficiency. The specially shaped rubber surround ensures maximum linear diaphragm excursion, 24-carat gold-plated screw terminals minimise contact resistance. Last but not least, the large magnet ventilation opening allows best possible minimisation of compression effects and the robust cover with BRAX lettering provides reliable protection for the magnet.

Each pair of speakers is unique

As is typical for BRAX, each pair of speakers is given its own serial number and recorded in a service database. This high-end product – Made in Germany – is rounded off by the packaging in a fine wooden box, which once again underlines the philosophy of the BRAX brand.


  • Very stiff lightweight paper cone with unique “MicroSphere” coating consisting of micro ceramic hollow spheres embedded in a polymer layer offers best possible impulse response without any sound colouration
  • Special shaped rubber surround for long linear cone excursion
  • Polyurethane dustcap for optimization of the frequency response in the upper midrange area
  • Extremely rigid aluminum diecast basket
  • 24 carat gold-plated screw terminals for lowest contact resistance
  • Powerful and precisely machined magnet system for high efficiency in combination with excellent magnetic flux linearity
  • Large pole-piece ventilation hole significantly reduces compression effects
  • Rugged magnet cover with BRAX lettering for perfect magnet protection

Technical data

Power handling RMS / max.  P 100 / 150 Watts
Impedance  Z 3 Ω
DC resistance  Re 3.0 Ω
Frequency response   40 Hz - 4,000 Hz
Resonance frequency  Fs 52 Hz
Mechanical Q factor  Qms 6.00
Electrical Q factor  Qes 0.57
Total Q factor Qts 0.52
Compliance Cms 603 μm/N
Equivalent air volume Vas 16.3 L
Force factor  B*I 5.2 Tm
Sensitivity  SPL 92 dB @ 2.83V / 1m
88 dB @ 1W / 1m
Cone area  Sd 139 cm²
Moving mass  Mms 15.3 g
Cone material   Paper cone with “MicroSphere” coating consisting of micro ceramic hollow spheres embedded in a polymer layer
Mechanical resistance  Rms 0.84 kg/s
Voice coil diameter ø 37 mm
Voice coil winding height   14 mm
Max. linear excursion  Xmax +/- 4.0 mm
Outer diameter ø 166 mm / 6.5"
Installation diameter ø 142 mm / 5.6"
Installation depth   68.2 mm / 2.7" 
Recommended enclosure volumes    
Sealed box    
Net volume   8 L
Lower limiting frequency (-3dB)   69 Hz
Vented box    
Net volume   15 L
Port diameter ø 60 mm / 2.4"
Port area   28 cm²
Port length   19 cm / 7.5"
Port tuning frequency Fb 45 Hz
Lower limiting frequency (-3dB)   48 Hz

Scope of delivery

2 x High-End Woofer BRAX GRAPHIC GL6 MK2
1 x Data sheet

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