PD.1850/3

Sub Bass Driver

Heavy-duty cast aluminium chassis for increased rigidity
Power compression only 1.6dB at rated power
A B/L in excess of 30 T/m
Double suspension
Appropriate for applications as diverse as scoop bins, conventional reflex cabinets and horn loaded systems

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Designed specifically to provide powerful and accurate bass frequencies with minimal distortion and power compression. The PD.1850/2 is the optimum choice for top of the range sub bass systems. Suitable for sound reinforcement in a variety of enclosure types such as scoop bins, conventional reflex cabinets and horn loaded systems.

General Specifications

Nominal Diameter	18" / 457.2 mm
Voice Coil Diameter	5.0" / 127 mm
Available Impedances	4 Ω/ 8 Ω/ 16 Ω
Power Rating ^{1 2 *}	800 w (A.E.S.)
Peak Power (6dB Crest Factor)*	3200 w (A.E.S.)
Sensitivity (1W – 1m)*	98 dB
Frequency Range	35 Hz - 2 kHz
Recommended Enclosure Volume	90 - 220 Litres
Resonance	33.15 Hz
Voice Coil Winding Depth	28 mm / 1.1"
Magnet Gap Depth	12 mm / 0.47"
Flux Density	1.18 Tesla
Magnet Material	Ceramic
Magnet Weight
Voice Coil Material	Copper
Former Material	Glass Fibre
Dust Dome Material	Paper
Suspension Material	Fabric
Cone Material	Paper
Surround Material	Fabric

Thiele Small Parameters

Fs	33.15 Hz
Re	5.22 Ω
Qms	15.42
Qes	0.24
Qts	0.24
Le (@1 kHz)
Le (@10 kHz)	1.33 mh
Vas	203.84 litres
Mms	215.24 g
Sd	1164.16 cm2
Cms	107 µm/N
BL	30.99 T/m
Xmax	11.05 mm
Vd	1.28 litres
Ref. Efficiency	2.88%
EBP	138.12 Hz

Dimensions & Mounting

Overall Diameter	474 mm
Widths Across Flats	459 mm
Flange Height	14.5 mm
Depth (Excl. Flange)	175 mm
Magnet Diameter	280 mm
Chassis Shoulder Diameter	414.5 mm
Outer Bolt Circle	6 * M8 on 455mm PCD
Inner Bolt Circle	N/A

Shipping Information

Nett Weight	23 Kg / 50.70 lb.
Shipping Weight	26.3 Kg / 57.98 lb.

Notes

* Power compression is the reduction of sensitivity at the specified power. Higher power ratings do not necessarily give a proportionate increase in SPL therefore the maximum SPL of the driver may significantly exceed that of other manufacturers with high power ratings.
** Distortion is measured at 10% of the rated power (AES Standard).
1. AES Standard (35 to 350 Hz). Program 1600 Watts.
2. AES Recommended Practice.
3. Thiele - Small Parameters follow a 800 Watt preconditioning period verified 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.