The DX Series incorporates 'state of the art' magnet technology using powerful rare earth magnetic materials.

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.

The effect of such powerful magnet assemblies coupled to the ‘Hi-Ferric' coil control system, increases the speed of the cones and yet has a truly remarkable degree of damping. This results in an exceptional transient response, but with the oscillating factor reduced to an absolute minimum by the remarkable control of the ‘Hi-Ferric' system.

The amount of information now obtainable from the recorded source is truly remarkable. If it is on the recording then it will be heard. No detail is missed and no degrading of the signal will occur due to unwanted coil oscillations.

It is true to say that never before has it been possible to achieve such a quality of sound reproduction. The DX series achieve a realism to sound reproduction that has to be heard to be believed.

Perhaps the most remarkable feature is the very compact size and light weight and yet with a magnetic power which is more than 10 times that possible from conventional magnets.

The DX series of drive units have so many advantages and this all adds up to a quality of sound reproduction that will provide a level of listening enjoyment equalled only by the pleasure of a live performance.

ABRIDGED SPECIFICATIONS DX2 DX3 DX4 DX45 DX55     Overall diameter 22.5 cm 22.5 cm 22.5 cm 17.4 cm 17.4 cm Overall Depth 7 cm 7 cm 8 cm 7.0 cm 7.2 cm Depth from Rear of Mounting Frame 6.4 cm 6.6 cm 7.9 cm 6.4 cm 6.6 cm PCD Mounting Centres 20.8 cm 20.8 cm 20.8 cm 15.6 cm 15.6 cm Baffle hole cut-out 19 cm 19 cm 19 cm 14 cm 14 cm Magnet Ring Diameter 7.6 cm 9.0 cm 9.0 cm 7.6 cm 9.0 cm Voice coil diameter 3.9 cm 3.9 cm 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 4, 8 or 15 ohm 4, 8 or 15 ohm Nominal impedance Z 8 ohm 8 ohm 8 ohm 8 ohm 8 ohm Minimum impedance Zmin 7.2 ohm 7.2 ohm 7.2 ohm 7.2 ohm 7.2 ohm Nominal Power Handling 100W 100W 100W 100W 100W Emission piston area Sd 0.021M² 0.021M² 0.021M² 0.021M² 0.021M² Air gap width 1 mm 1 mm 1 mm 1 mm 1 mm Air gap height 5 mm 5 mm 5.5 mm 5 mm 5 mm Magnet type 'Hi-Ferric'™ Rare Earth 'Hi-Ferric'™ Rare Earth 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 1.7 Tesla 2.0 Tesla Diaphragm Twin-paper Twin-paper Twin-paper Twin-paper Twin-paper Frequency response 30 Hz - 20 kHz 30 Hz - 22 kHz 30 Hz - 22 kHz 80 Hz - 20 kHz 80 Hz - 22 kHz Nominal air resonance 36 Hz 36 Hz 36 Hz 60 Hz 80 Hz Sensitivity at 1m/1kHz/1watt 97 db 98 db 99.5 db 93 db 94 db Maximum voice coil travel ± 1 mm ± 1 mm ± 1 mm ± 1 mm ± 1 mm Suspension compliance Cms 993.888 uM/N 993.888 uM/N 993.888 uM/N     Total Q Factor Qts 0.246 0.247 0.249 0.326 0.320 Electrical Q Factor Qes 0.22 0.22 0.22     Mechanical Q Factor Qms 3.11 3.11 3.11     Equivalent Volume Suspension Vas 0.015M³ 0.015M³ 0.015M³ 0.011M³ 0.011M³ Effective Moving Mass Kg. 0.0115 0.0115 0.0115     Shipping weight 2.0 kg 2.5 kg 3.0 kg 2.0 kg 2.5 kg

Please email us if you require any further technical information.

Despatch of drive units, ex-works, worldwide, is within 7 working days of receipt of payment.

Specifications subject to amendment without prior notice where design developments permit advancement.

Designed, made in England and distributed world-wide by:

LOWTHER LOUDSPEAKER SYSTEMS. P.O. Box 184, Sidcup, Kent DA14 4NL, ENGLAND.

• Email: {sales@lowtherloudspeakers.co.uk}
• UK FAX: 020 8308 0778
• International FAX: 0044 20 8308 0778
• UK PHONE: 020 8300 9166
• International PHONE: 0044 20 8300 9166

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