Precision Devices PD.185NR1 Speaker Component 18" Neodymium 8 Ohm

Radial neodymium motor structure.
Vented cast aluminium chassis for improved thermal control of voice coil.
Forced air cooling vented voice coil gap.
Aluminium demodulation ring.
Dual spider configuration with silicone based damping control.
5" High temperature copper voice coil.
Triple-roll surround straight cone geometry.
For sub bass applications in bass reflex / horn loaded enclosures.

SPECIFICATIONS
Nominal Diameter 18" / 457.2 mm
Nominal Impedance 4 / 8 / 16
Voice Coil Diameter 5.0" / 127 mm
Power Rating 1400 W (A.E.S.)
Peak Power (6dB Crest Factor) 5600 W (A.E.S.)
Sensitivity (1w / 1m) 97.5 dB
Frequency Range 30 Hz - 800 Hz
Recommended Enclosure Volume 90 - 200 Litres
Voice Coil Winding Depth 1.20" / 30.50 mm
Magnet Gap Depth 13.00 mm / 0.51"
Flux Density 1.18 Tesla
Magnet Material Neodymium
Magnet Weight N/A
Voice Coil Material Copper
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 34 Hz
Re 5.4
Qms 6.170
Qes 0.290
Qts 0.270
Le @1k 2.490 mH
Le @10k 1.290 mH
Vas 102 Litres
Mms 216.00 g
Sd 1164 cm2
Cms 99.70 m/N
BL 29.50 T/m
Xmax 11.75 mm
Vd 1.400 Litres
Reference Efficiency 2.50 %
EBP 117.24 Hz
MOUNTING AND SHIPPING INFORMATION
Overall Diameter 473.60 mm
Width Across Flats 458.73 mm
Flange Height 14.50 mm
Depth 200.00 mm
Magnet Diameter 140 mm
Chassis Shoulder Diameter 415.00 mm
Outer Bolt Circle x6 M8 on 456 mm PCD