Data Sheet

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140122
FREQUENCY RESPONSE & IMPEDANCE CHARTS
4
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) 200 mm
Magnet Diameter 150 mm
Chassis Shoulder Diameter 415 mm
Outer Bolt Circle x6 M8 on 455 mm PCD
WEIGHT
Nett Weight 10.90 kg / 24.03 lb
Shipping Weight 12.90 kg / 28.43 lb
Fs 34.1 Hz
Re 4.70 Ω
Qms 10.961
Qes 0.333
Qts 0.324
Le (@ 1 kHz) 1.578 mH
Le (@ 10 kHz) --- mH
Vas 179.04 Litres
Mms 231.489 g
Sd 1158.12 cm
2
Cms 0.094 mm/N
BL 26.424 T/m
Xmax 16.00 mm
Vd --- Litres
Ref. Eciency 2.65%
EBP 102.40 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. A.E.S. Standard (--- to --- Hz). Program ---- Watts.
2. A.E.S. Recommended Practice.
3. Thiele - Small Parameters follow a ---- 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.1845-1N
SUB BASS DRIVER
GENERAL SPECIFICATIONS
Nominal Diameter 18” / 457.2 mm
Voice Coil Diameter 4.5” / 114.3 mm
Available Impedances 4 / 8 / 16 Ohm
Power Rating
1 2 *
1500 W (A.E.S.)
Peak Power (6dB Crest
Factor)
*
6000 W (A.E.S.)
Sensitivity (1W - 1m)
*
98.8 dB
Frequency Range 30 Hz - 1 kHz
Recommended Enclosure
Volume
200 Litres
Resonance 34.1 Hz
Voice Coil Winding Depth 37.00 mm / 1.45”
Magnet Gap Depth 15.0 mm / 0.59”
Flux Density 0.92 Tesla
Magnet Material Neodymium
Voice Coil Material Copper Clad Aluminium
Former Material Glass Fibre
Dust Dome Material Solid Paper
Suspension Material Poly Cotton
Cone Material Paper
Surround Material M Roll Poly Cotton
+120
+110
+100
+90
+80
+70
+60
+50
dB (1W-1m)
20 50 100 200 500 1k 2k 5k 10k 20k(Hz)
200
100
50
20
10
5
2
1
Ohms (Ω)
20 50 100 200 500 1k 2k 5k 10k 20k(Hz)