Brax GRAPHIC GL2

Brax GRAPHIC GL2 – 50 mm High-End Broadband Midrange

The GL2 is the newest member of the BRAX GRAPHIC series, the BRAX line built on Heinz Fischer’s goal of bringing high-end home audio sound into cars without compromise. It is a 50 mm (2″) midrange driver for which every part, from basket to diaphragm, was newly designed and produced with purpose-built tools; like the whole series, it is made in Germany.

Thanks to its very wide frequency response – also off-axis – the GL2 can be used as a broadband speaker without a separate tweeter, coming close to an ideal point source for better spatial reproduction. Its extremely rigid aluminium cone, made by Dr. Kurt Müller, gives a natural, dynamic midrange, while a precisely made neodymium magnet system with linear flux keeps distortion very low.

Key Features

• Broadband response: 400–20,000 Hz, wide even off-axis, so it can be used without a tweeter.
• Point-source imaging: running without a tweeter approaches an ideal point source for better spatial reproduction.
• Rigid aluminium cone: light and stiff, made by Dr. Kurt Müller, for a natural and dynamic midrange.
• Precision neodymium magnet system: high flux linearity for very low distortion.
• Aerodynamically optimised basket: fully redesigned using dedicated tooling.
• Extremely compact: outer diameter almost identical to the BRAX GRAPHIC GL1 tweeter – ideal for A-pillars.
• Hidden rear fastening: threaded hole in the magnet system for discreet mounting from behind.
• 24-carat gold-plated terminals: purist look and maximum conductivity.
• Sturdy black grille: protects the cone and suits a minimalist design.
• Serial-numbered pairs: recorded in a service database; supplied in a wooden box.

Drivers & Construction

The GL2 uses a 19 mm (0.75″) voice coil with 5 mm winding height and an aluminium cone with an effective area (Sd) of 15 cm² and a moving mass (Mms) of 1.6 g. The neodymium motor is precisely machined and has a threaded hole at the back for hidden mounting; the basket is aerodynamically optimised.

Acoustic Performance

• Power handling: 80 W RMS / 120 W max. (with high-pass above 400 Hz, 24 dB/oct.).
• Impedance: 4 Ohms (DC resistance 3.1 Ohms).
• Frequency response: 400–20,000 Hz.
• Efficiency: 84 dB SPL @ 1 W / 1 m.
• T/S parameters: Fs 165 Hz, Qms 8.90, Qes 0.55, Qts 0.52, Vas 0.24 L, Cms 720 µm/N, BxL 2.6 Tm, Rms 0.13 kg/s.
• Max. linear excursion: ±1.0 mm.

Installation Notes

Outer diameter is 60 mm (2.36″), installation diameter 53 mm (2.1″) and installation depth 26.8 mm (1.1″); two mounting clips are included. BRAX recommends a sealed enclosure of at least 250 ml net volume, filled with suitable damping material:

• 0.25 L: system resonance 200 Hz; crossover 600 Hz, min. 12 dB/oct.
• 0.5 L: system resonance 155 Hz; crossover 450 Hz, min. 12 dB/oct.
• 0.75 L: system resonance 140 Hz; crossover 300 Hz, min. 24 dB/oct.

Technical Specifications

Note: The enclosure should always be filled with appropriate damping material.

Scope of Delivery

2 x High-End Cone Midrange Speaker BRAX GRAPHIC GL2
2 x Mounting clip
1 x Allen key
1 x Data sheet