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Lowther PM6 A Series high efficiency fullrange
Lowther Loudspeaker Drive units are for use where only the finest standards of sound reproduction will satisfy. Their unique design and performance are world famous. Only the finest proven materials and micro-precision techniques are used in their production.
The 'A' Series range maximises design potential enabling Lowther quality to be enjoyed in systems using single drive units to multi-unit assemblies such as Lowther's incomparable horn-loaded designs.
NOTES:
(1) Suitably housed, multi-unit assemblies do not necessarily require passive cross-over systems between bass, mid and high frequency units.
(2) All units are rated at 100 Watts.
Technical characteristics:
Voice coil DC resistance Re 7.4 ohms
Free air resonance Fo 45 Hz
Emission piston area Sd 0.021M²
Equivalent volume suspension VAS 56,001 liters of l
Suspension of Compliance Cms 894.264 u M / N
Cone Weight Mmd 11.0g
Weight of Moving Parts mms 12.75 g
Force factor Bl 7.283 T-M
Mechanical Q Factor Qms 4.252
Electrical Factor Q Q is 0.513
Q Factor Total Qts 0.457
Voice coil inductance at 1 kHz Le 128.56 uH
Reference efficiency No 1.106%
Sound pressure level SPL 92,457 DbTotal diameter 22.5 cm
Overall depth 10.5cm
Depth of rear of mounting frame 9.6 cm
8" PCD Mounting Centers
Deflector Cutout hole 19 cm
Magnet ring diameter 9.1 cm
Coil diameter 3.9 cm
Voice coil impedance (nominal) 8 or 15 ohms
Air gap Width 1 mm
5mm air gap height
Magnet type Alcomax 3
Flux Density (I Tesla = 10,000 Gauss) 1.75 Tesla
Twin paper diaphragm
Frequency response 30Hz-20kHz
Maximum voice coil displacement ± 1 mm
Shipping weight 4kg
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