Lowther DX Series

The DX series of drive units employ 'state of the art' rare earth magnet technology. The magnet assemblies are extremely light and compact, yet much more powerful than any conventional magnets. Coupled to Lowther's own Hi-Ferric' coil control system, the acceleration and damping factors are increased well beyond anything achieved in the past, even with the extremely large and powerful magnet assemblies for which Lowther has always been renowned. These all-powerful magnet assemblies allow the diaphragms to reach acceleration rates well beyond the capabilities of any conventional magnet system.

       

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SPECIFICATIONS
DX2 DX3 DX4
Overall diameter 23.2 cm 23.2 cm 23.2 cm
Overall Depth 7 cm 7 cm 8 cm
Depth from Rear of Mounting Frame 6.4 cm 6.6 cm 7.9 cm
PCD Mounting Centres 20.8 cm 20.8 cm 20.8 cm
Baffle hole cut-out 19 cm 19 cm 19 cm
Magnet Ring Diameter 7.6 cm 9.0 cm 9.0 cm
Voice coil diameter 3.9 cm 3.9 cm 3.9 cm
Voice coil impedance (nominal) 4, 8 or 15 ohm 4, 8 or 15 ohm 4, 8 or 15 ohm
Nominal impedance 8 ohm 8 ohm 8 ohm
Minimum impedance 7.2 ohm 7.2 ohm 7.2 ohm
Emission piston area 0.021M 0.021M 0.021M
Air gap width 1 mm 1 mm 1 mm
Air gap height 5 mm 5 mm 5.5 mm
Magnet type 'Hi-Ferric' Rare Earth 'Hi-Ferric' Rare Earth Hi-Ferric' Rare Earth
Flux density (1 Tesla=10,000 gauss) 1.7 Tesla 2.0 Tesla 2.2 Tesla
Diaphragm Twin-paper Twin-paper Twin-paper
Frequency response 30 Hz - 20 kHz 30 Hz - 22 kHz 30 Hz - 22 kHz
Nominal air resonance 36 Hz 36 Hz 36 Hz
Sensitivity at 1m/1kHz/1watt 97 db 98 db 99.5 db
Maximum voice coil travel 1 mm 1 mm 1 mm
Suspension compliance 1.24x1.8mn-1 1.24x1.8mn-1 1.24x1.8mn-1
Total Q Factor 0.246 0.247 0.249
Electrical Q Factor 0.22 0.22 0.22
Mechanical Q Factor 3.11 3.11 3.11
Equivalent Volume Suspension 0.15M 0.15M 0.15M
Effective Moving Mass Kg. 0.0115 0.0115 0.0115
Shipping weight 2.0 kg 2.5 kg 3.0 kg

All drivers can be ordered with Silver Coils