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Specifications
Nominal Diameter 250 mm (10 in)
Nominal Impedance 8 Ω
Minimum Impedance 5.5 Ω
Power Handling
(50 - 500 Hz)
Nominal
1
150 W
Continuous Program
2
300 W
Sensitivity (1W/1m)
3
97.5 dB
Frequency Range 55 – 4000 Hz
Voice Coil Diameter 51 mm (2 in)
Winding Material Aluminium
Former Material Kapton
Winding Depth 13.5 mm (17/32 in)
Magnetic Gap Depth 8 mm (5/16 in)
Flux Density 1.1 T
Also available in 4 Ω, data upon request
Thiele & Small Parameters
4
Fs 55 Hz
Re 5 Ω
Qes 0.41
Qms 3.5
Qts 0.36
Vas 50 dm
3
(1.8 ft
3
)
Sd 320 cm
2
(50 in
2
)
η
0
2.1%
X max ± 4 mm
X Var ± 4.5 mm
Mms 24 g
Bl 10.2 T·m
Le 0.9 mH
Mounting and Shipping Information
Overall Diameter 261 mm (10.3 in)
Bolt Circle Diameter 245 mm (9.6 in)
Baffle Cutout Diameter 230 mm (9 in)
Depth 124 mm (4.9 in)
Flange and Gasket Thickness 12.5 mm (1/2 in)
Net Weight 1.9 kg (4.2 lb)
Shipping Weight 2.4 kg (5.3 lb)
Shipping Box 270x270x150 mm
(11.2x11.2x5.9 in)
1
2 hours test made with continuous pink noise signal (6 dB crest factor) within
the specified frequency range. Power calculated on rated minimum impedance.
Loudspeaker mounted in 35 liters (1.25 cu. ft
3
) bass-reflex box, tuned at 65 Hz.
2
Power on Continuous Program is defined as 3 dB greater than the Nominal rating.
3
Applied RMS Voltage is set to 2.83V for 8 ohms Nominal Impedance. Average
SPL from 200 to 4000 Hz.
4
Thiele-Small parameters are measured after a high level 20 Hz sine wave pre-
conditioning test.
10 HPL 51 | Woofer
High efficiency 10" woofer using a FEA computer designed high
energy Neodymium magnet assembly, extremely lightweight
(only 1.9 kg). The aluminium basket is designed to effectively
dissipate heat during demanding use at full power, reducing
power compression. Recommended for compact two-way
systems where power is limited to 300W.
Speakers HPL Coaxials HF Compression drivers Horns