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400 GMF
Bass drive unit.
This low register loudspeaker of high efficiency (96 dB) uses the same moving element as 400-2000. Its difference is the magnet and the field plate ( ferrite of 220 mm instead of Alnico ). These qualities enable him to be directly coupled with our 1 inch horn.
It can be used in a bassreflex or jensen, crossed with 500Hz, the response curve will be linear with ± 2 dB from 40 Hz until the final frequency of 1 inch driver. It can be used perfectly for low register (symmetrical load).
Mesurements curves
400 GMF Specifications

Efficiency 1 W/1m at Fs

96 dB Fs 26 Hz
Frequency response 8 ohms Re 6.5 ohms
Impedance 24 à 4kHz Qts 0.32

Power max. RMS

120 W Qe 0.33
Weight 10.7 kg Qm 10
Suspension Toile Vas 489
Linear excursion 10 mm Bl 15.8

Magnet diameter

220 mm Cms
Magnetic field 1.8 T Mms 70 g

Diameter HP

404 mm Sd
855 cm²

Frame thickness

Alu 10mm    
Diameter fixation holes 382 mm    

Diameter drilling enclosure

358 mm    

Depth HP

165 mm