PD.185C003
- 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



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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.
The PD.185C003 has been designed as combination of our PD.1850 and PD.1851 drivers. Its primary advantage over the two is that the total X mesh has been increased to 50 mm peak-to-peak travel above the standard 36 mm for the 1850 and 1851. This allows the PD.185C03 to be more user-friendly, rendering cabinet chamber sizes less critical for providing cabinet assistance to the drivers loading. Furthermore it provides additional protection to the drivers voice coil during transient signals at the low end of the frequency spectrum. PD.1851 and PD.1852 drivers also possess this protection but offer a different sound character owing to their surround geometry and compliance.
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 * | 1000 W (A.E.S.) |
Peak Power (6dB Crest Factor)* | 4000 W (A.E.S.) |
Sensitivity (1W – 1m)* | 99 dB |
Frequency Range | 30 Hz - 500 Hz |
Recommended Enclosure Volume | 90 - 250 Litres |
Resonance | 33 Hz |
Voice Coil Winding Depth | 1.10" / 28.00 mm |
Magnet Gap Depth | 12.00 mm / 0.47" |
Flux Density | 1.25 Tesla |
Magnet Material | Y35 Ferrite |
Magnet Weight | |
Voice Coil Material | Copper (Inside / outside winding) |
Former Material | Glass Fibre |
Dust Dome Material | Solid Paper |
Suspension Material | Poly Cotton |
Cone Material | Paper |
Surround Material | M Roll Poly Cotton |
Thiele Small Parameters
Fs | 33 Hz |
Re | 5.4 Ω |
Qms | 10.6 |
Qes | 0.229 |
Qts | 0.24 |
Le (@1 kHz) | |
Le (@10 kHz) | 2.800 mH |
Vas | 224 Litres |
Mms | 197.00 g |
Sd | 1164 cm2 |
Cms | 118.00 µm/N |
BL | 31.50 T/m |
Xmax | 11 mm |
Vd | 1.274 Litres |
Ref. Efficiency | 3.40% |
EBP | 144.10 Hz |
Dimensions & Mounting
Overall Diameter | 18" / 457.2 mm |
Widths Across Flats | 459 mm |
Flange Height | 14.50 mm |
Depth (Excl. Flange) | 194.00 mm |
Magnet Diameter | 280 mm |
Chassis Shoulder Diameter | 415.00 mm |
Outer Bolt Circle | x6 M6 on 456 mm PCD |
Inner Bolt Circle | N/A |
Shipping Information
Nett Weight | |
Shipping Weight |
Notes
*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.
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