Brax GRAPHIC GL1 MK2

Brax GRAPHIC GL1 MK2 – 25 mm Ceramic Dome High-End Tweeter

The GL1 MK2 is the tweeter of the BRAX GRAPHIC speaker series, the line in which Audiotec Fischer pursues its founder Heinz Fischer’s goal of bringing home high-end sound into the car without compromises in design, technology or sound. Components and craftsmanship are made in Germany.

Its 25 mm (1″) dome is built on an aluminium substrate onto which ceramic powder is melted with a plasma flame. The result is a dome that combines stiffness, low moving mass and high internal damping for brilliant, compression-free treble. A merino-wool damped coupling volume lowers the resonance frequency and therefore allows lower crossover points.

Key Features

• Ceramic aluminium hard dome: plasma-applied ceramic coating on an aluminium substrate for very stiff, precise and dynamic treble.
• Low moving mass: Mms of just 0.36 g.
• Merino-wool damped coupling volume: lowers the resonance frequency (Fs 900 Hz) for lower crossover frequencies.
• CNC-machined stainless steel housing: solid construction for refined looks and effective heat dissipation.
• 12-vent neodymium magnet: precision-machined with 12 drilled ventilation holes for linear magnetic flux.
• Recessed 24-carat gold-plated terminal: integrated into the housing for low contact resistance.
• Hidden mounting: rear mounting ring with fine thread for discreet integration.
• Protective grille: sturdy grille protects the dome.
• Serial-numbered: each tweeter has its own serial number recorded in a database.
• Made in Germany: supplied as a pair in a wooden box.

Drivers & Construction

The GL1 MK2 uses a 25 mm (1″) voice coil and a ceramic aluminium hard dome with a cone area (Sd) of 4.9 cm². The driver is housed in solid CNC-machined stainless steel, with a 12-vent neodymium magnet and a merino-wool damped rear chamber. Terminals are recessed and 24-carat gold-plated.

Acoustic Performance

• Power handling: 100 W RMS / 150 W max. (with high-pass above 3,000 Hz, 12 dB/oct.).
• Impedance: 4 Ohms (DC resistance 3.4 Ohms).
• Frequency response: 2,000–25,000 Hz.
• Resonance frequency (Fs): 900 Hz.
• Sensitivity: 93 dB @ 2.83 V / 1 m; 90 dB @ 1 W / 1 m.

Crossover

Recommended minimum high-pass frequencies: 4,000 Hz at 6 dB/octave, above 3,000 Hz at 12 dB/octave, and above 2,000 Hz at 24 dB/octave.

Installation Notes

Outer diameter is 60 mm (2.4″), installation diameter 52 mm (2.0″) and installation depth 21.5 mm (0.9″). Two mounting rings and two grilles are included; the finely threaded rear mounting ring allows hidden fastening in the vehicle interior.

Technical Specifications

Scope of Delivery

2 x High-End Tweeter BRAX GRAPHIC GL1 MK2
2 x Mounting ring
2 x Grille
1 x Allen key
1 x Data sheet