285 GMF Haut-parleur grave médium 70W / 99dB / 8Ω - Supravox

Product Sheet

Classic series
Its objective, to maintain the philosophy of SUPRAVOX, full range driver units and high efficiency. We work still to widen the useful bandwidth for a highest efficiency possible, while unceasingly improving the definition, the quality and the linearity. Diameter 135 to 380 mm, the audiophile can satisfy its passion.


This high efficiency drive unit offer a very fast low register to you and pleasant listening. Ideal listening with an amplifier of low power (tube or transistor) of approximately 10W, it supports also stronger powers for a use out of low register boxes. In open baffle, it will reinforce, with the same degree of accuracy of reproduction the 215 rtf, to add a low register reinforcement to him and to ensure a comfortable and balanced listening.

In column TQWT it will emphasize all the smoothness of your preferred listenings.

In RJ subwoofer, bass reflex or symmetrical, it will be a low register of accompaniment of most precise. This driver unit could be coupled with an 1 inch driver + horn.

Frequency response 200 Hz to 20 kHz in the axis


Frequency response 200 Hz to 20 kHz at 30°


Frequency response 200 Hz to 20 kHz at 60°


Frequency response in 1/3 octave


Impulse response






Efficiency: 99dB
Bandwidth: 40Hz-7KHz
Power: 70W
Suspension: 3 paper pleats
Linear excursion: 8mm
Magneet diameter: 120mm
Magnetic field: 1.4 T
Diameter HP: 290/307mm
Frame thickness: Alu 8mm
Diameter fixation: 294mm
Diameter drilling holes: 280mm
Depth HP: 128mm
Fs : 47Hz
Re : 6.5Ω
Qts : 0.38
Qe : 0.39
Qm : 8
Vas : 150 L
Bl : 10.7
Cms : 0.6
Mms : 20 g
Sd : 471 cm2