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Bass medium drive unit.
On the basis of 285 GMF, we adopted the same engine as 215-2000. That enables us to obtain a low register even faster. With weaker Qt and a more important efficiency, it is the low medium ideal in the active multichannel installations. Iit is the ideal driver unit for a low register horn.
Mesurement curves
285-2000 Specifications

Efficiency 1 W/1m at Fs

101 dB


45 Hz
Frequency response 45 7kHz Re 6.5 ohms
Impedance 8 ohms



Power max. RMS

70 W Qe 0.22
Weight 7.5 kg Qm 6
Suspension 3 plis papier Vas 200 L
Linear excursion 8 mm Bl 12

Magnet diameter

3.5 kg Cms 0.6
Magnetic field 2.1 T Mms 18.5g

Diameter HP

290/307mm Sd
471 cm²

Frame thickness

Alu 8 mm    
Diameter fixation holes 294 mm    

Diameter drilling enclosure

280 mm    

Depth HP

180 mm