Precision Devices PD.185C003 Sub Bass Driver 18 inch 1000 Watt

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  • Vented cast aluminium chassis for improved thermal control of voice coil.
  • Vented motor structure for improved control of power compression.
  • 50 mm peak to peak travel.
  • 31 T/m BL.
  • Dual suspension assembly.
  • Inside/ outside voice coil windings.
  • Works well in conventional reflex designs and horn loading applications.


The PD.185C003 is ideally suited to applications where high power handling, long excursion and perfect linearity is required. Ideal for bass reflex and horn loaded enclosure systems where a high punch and low sub is required. The robust mechanical design and construction makes this unit an ideal choice for high power high SPL bass applications.


* 2.83V. Half space response measured in a 975 litre sealed enclosure.

*1 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 (30 to 300 Hz) Program 1000 Watts.

2. AES Recommended Practice.

3. Thiele - Small Parameters follow a 1000 Watt preconditioning period.

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.

Nominal Diameter18" / 457.2 mm
Nominal Impedance4 / 8 / 16 Ω
Voice Coil Diameter5.0" / 127 mm
Power Rating1000 W (A.E.S.)
Peak Power (6dB Crest Factor)4000 W (A.E.S.)
Sensitivity (1w / 1m)99 dB
Frequency Range30 Hz - 500 Hz
Recommended Enclosure Volume90 - 250 Litres
Voice Coil Winding Depth1.10" / 28.00 mm
Magnet Gap Depth12.00 mm / 0.47"
Flux Density1.25 Tesla
Magnet MaterialY35 Ferrite
Magnet Weight5.70 Kg / 201.06 oz
Voice Coil MaterialCopper (Inside / outside winding)
Former MaterialGlass Fibre
Dust Dome MaterialSolid Paper
Suspension MaterialPoly Cotton
Cone Surround MaterialPaper / M Roll Poly Cotton
Fs33 Hz
Re5.4 Ω
Le @1k2.800 mH
Le @10k1.360 mH
Vas224 Litres
Mms197.00 g
Sd1164 cm2
Cms118.00 µm/N
BL31.50 T/m
Xmax11 mm
Vd1.274 Litres
Reference Efficiency3.40 %
EBP144.10 Hz

Overall Diameter473.00 mm
Width Across Flats459 mm
Flange Height14.50 mm
Depth194.00 mm
Magnet Diameter280 mm
Chassis Shoulder Diameter415.00 mm
Outer Bolt Circlex6 M6 on 456 mm PCD