Data Sheet

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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 (Excluding Flange) 178 mm
Magnet Diameter 280 mm
Chassis Shoulder Diameter 415 mm
Outer Bolt Circle x6 M6 on 456 mm PCD
WEIGHT
Nett Weight 23.80 kg / 52.47 lb
Shipping Weight 25.80 kg / 56.88 lb
Fs 41.85 Hz
Re 5.18 Ω
Qms 11.1
Qes 0.34
Qts 0.33
Le (@ 1 kHz) 0.9 mH
Le (@ 10 kHz) - mH
Vas 120.38 Litres
Mms 231.21 g
Sd 1164.16 cm
2
Cms 63 µm/N
BL 30.47 T/m
Xmax 12.00 mm
Vd 1.397 Litres
Ref. Efciency 2.34%
EBP 123.08 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.
1. AES Standard (35 to 350 Hz). Program 1600 Watts.
2. AES Recommended Practice.
3. Thiele - Small Parameters follow a 1000 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.
FREQUENCY RESPONSE & IMPEDANCE CHARTS
4
PD.1852/2 SUB BASS DRIVER
20
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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
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 *
1000 W (A.E.S.)
Peak Power (6dB Crest
Factor)
*
4000 W (A.E.S.)
Sensitivity (1W - 1m)
*
98 dB
Frequency Range 35 Hz - 2 kHz
Recommended Enclosure
Volume
90 - 220 Litres
Resonance 41.85 Hz
Voice Coil Winding Depth 29.00 mm / 1.14”
Magnet Gap Depth 12.0 mm / 0.47”
Flux Density 1.18 Tesla
Magnet Material Ceramic
Voice Coil Material Copper
Former Material Glass Fibre
Dust Dome Material Paper
Suspension Material Dual Silicone
Cone Material Paper
Surround Material HGBC