Precision Devices PD.185C003 Speaker Component 18" 8Ohm

Vented cast aluminium chassis for improved thermal control of voice coil.
Vented motor structure for improved control of power compression.
50 mm peak to peak travel.
31 T/m BL.
Dual suspension assembly.
Inside/ outside voice coil windings.
Works well in conventional reflex designs and horn loading applications.

SPECIFICATIONS
Nominal Diameter 18" / 457.2 mm
Nominal Impedance 4 / 8 / 16
Voice Coil Diameter 5.0" / 127 mm
Power Rating 1000 W (A.E.S.)
Peak Power (6dB Crest Factor) 4000 W (A.E.S.)
Sensitivity (1w / 1m) 99 dB
Frequency Range 30 Hz - 500 Hz
Recommended Enclosure Volume 90 - 250 Litres
Voice Coil Winding Depth 1.10" / 28.00 mm
Magnet Gap Depth 12.00 mm / 0.47".
Flux Density 1.25 Tesla
Magnet Material Y35 Ferrite
Magnet Weight 5.70 Kg / 201.06 oz
Voice Coil Material Copper (Inside / outside winding)
Former Material Glass Fibre
Dust Dome Material Solid Paper
Suspension Material Poly Cotton
Cone Surround Material Paper / M Roll Poly Cotton
THIELE SMALL PARAMETERS
Fs 33 Hz
Re 5.4
Qms 10.600
Qes 0.229
Qts 0.240
Le @1k 2.800 mH
Le @10k 1.360 mH
Vas 224 Litres
Mms 197.00 g
Sd 1164 cm2
Cms 118.00 m/N
BL 31.50 T/m
Xmax 11 mm
Vd 1.274 Li