Data Sheet

WWW.PRECISION-DEVICES.COM
© Precision Devices International Ltd. We operate a policy of continuous research and development and as such published specifications are subject to change without notice.
030221
THIELE SMALL PARAMETERS (8 Ω MODEL)
3
DIMENSIONS & MOUNTING INFORMATION
Overall Diameter 474 mm
Width Across Flats 459 mm
Flange Height 14.5 mm
Depth (Excl. Flange) 175 mm
Magnet Diameter 220 mm
Chassis Shoulder Diameter 415 mm
Outer Bolt Circle x6 M6 on 456 mm PCD
WEIGHT
Nett Weight 22.80 kg / 50.26 lb
Shipping Weight 26.60 kg / 58.64 lb
Fs 34.18 Hz
Re 6.19 Ω
Qms 10.77
Qes 0.55
Qts 0.52
Le (@ 1 kHz) 1.95
Le (@ 10 kHz) - mH
Vas 192.15 Litres
Mms 203.93 g
Sd 1134.11 cm
2
Cms 106.67 µm/N
BL 22.18 T/m
Xmax 10.50 mm
Vd 1.2 Litres
Ref. Efciency 2.05%
EBP 62.14 Hz
* Power compression is the reduction of sensitivity at the specied power. Higher power ratings do not necessarily
give a proportionate increase in SPL therefore the maximum SPL of the driver may signicantly exceed that of other
manufacturers with high power ratings.
** Distortion is measured at 10% of the rated power (A.E.S. Standard).
1. A.E.S. Standard (40 to 400 Hz). Program 1400 Watts.
2. A.E.S. Recommended Practice.
3. Thiele - Small Parameters follow a 700 Watt preconditioning period veried by Klippel LSI measurement.
4. 2.83V. Half space response measured in a 975 Litre sealed enclosure.
Please note that frequency response measurements are supplied for comparison purposes only and are not a measure of
the low frequency performance which may be achievable in a fully optimised system.
PD.186/3 SUB BASS DRIVER
GENERAL SPECIFICATIONS
Nominal Diameter 18” / 457.2 mm
Voice Coil Diameter 5.0” / 127 mm
Available Impedances 4 / 8 / 16 Ohm
Power Rating
1 2 *
700 W (A.E.S.)
Peak Power (6dB Crest
Factor)
*
2800 W (A.E.S.)
Sensitivity (1W - 1m)
*
95 dB
Frequency Range 30 Hz - 2 kHz
Recommended Enclosure
Volume
100 - 350 Litres
Resonance 34.18 Hz
Voice Coil Winding Depth 25 mm / 0.98”
Magnet Gap Depth 9 mm / 0.35”
Flux Density 0.95 Tesla
Magnet Material Ceramic
Voice Coil Material Copper
Former Material Glass Fibre
Dust Dome Material Paper
Suspension Material Dual Fabric
Cone Material Paper
Surround Material Fabric
FREQUENCY RESPONSE & IMPEDANCE CHARTS
4
20
0
50
100
150
200
250
300
+50
+60
+70
+80
+90
+100
+110
50 100 200 500 1k 2k 5k 10k 20k
Ohms (Ω) dB (1W* - 1m)
Hz