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285-2000 EXC
Bass medium drive unit.

Evolution of the 285 GMF, this loudspeaker offers qualities of reproduction close to the version ferrite (GMF) because they have the same moving element.

On the other hand the oversize engine of excitation makes it possible the 285 to pass the barrier of 100dB SPL.

Its magnetic field is adjustable and adaptable of this fact to many enclosures, it requires an external power supply (ideal of 6 to 12V for 5A).

Mesurement curves
285-2000 EXC specifications

Efficiency 1 W/1m at Fs

93 à 102dB

Power supply

0 à 12 Volts CC.
Frequency response 50 7kHz Magnetic field 0 à 1.6 T
Impedance 8 ohms

Diameter HP

290/307 mm

Power max. RMS

70 W

Frame thickness

Alu 8mm
Weight 7.5 kg Diameter fixation holes 294 mm
Suspension Papier

Diameter drilling enclosure

280 mm

Resonance frequency

50 Hz

Depth HP

180 mm
Linear excursion +/- 4 mm Sd
471 cm²

Thiele et Small parameters

Fs
Mms
Cms
R dc
53 Hz
18.5 g
0.49
6.5

 

Vcc

6 V

7 V

8 V

9 V

10 V

11 V

12 V

Vas 154 158 154 156 154 155 154

Qts

0.64

0.49

0.39

0.31

0.27

0.25

0.21

Qe

0.68

0.51

0.41

0.32

0.27

0.25

0.22

Qm

10.48

10

9.31

9.33

8.83

7.9

8.2

Bl

7.74

8.8

9.98

11.1

12.1

12.6

13.5

SPL ref

97.1

98.5

99.4

100

101

101

102