24" ifrån Precision-Devices.
http://www.precision-devices.com/Search.asp?types=yes&type=24
PD2450 Technical Information
Nominal Diameter 61 cm (24")
Power rating 1000 Watts
Frequency range 30 to 1 kHz
Nominal Impedance 8 Ohms
Sensitivity (1 W 1 M) 99 dB
Resonance 25 Hz
Enc. Vol. Recommended 130 to 400 Litres
Displacement limit 36 mm (1.42”)
Voice coil diameter 152 mm (6.0”)
Voice coil Copper
Voice coil winding depth 30 mm (1.18”)
Suspension (Spider) Dual Fabric
Magnet gap depth 15 mm (0.59”)
Magnet material/mass Ceramic/6.12 Kg (220 oz.)
Magnetic assembly total mass 27.2 Kg (60.11 Lbs.)
Flux Density 11,000 Gauss
Cone type/material Paper synthetic reinforced
Surround Fabric
Dust dome Paper
Connectors Spring loaded push button metal bodied
Polarity Positive Voltage on Red Terminal gives forward cone motion
Thiele-Small Parameters
Fs 30.477 Hz
L1 1.917 mH
Revc 5.58 Ohms
L2 3.733 mH
Res 110.05 Ohms
RMSE-load 2.223 Ohms
Qts 0.33
RMSE-free 1.26 Ohms
Qms 6.890
Vas 565.373 Litres
Qes 0.35
Mms 342.347 grams
Sd 2248.01 sq cm
Cms 79.333 µM/N
R2 11.373 Ohms
BL 32.357 T/m