Sub Bass Driver
  • Lightweight neodymium motor system
  • Heavy duty cast aluminium frame for increased rigidity
  • Low distortion subwoofer
  • Long driver excursion
  • High BL factor in excess of 30 T/m
  • Double suspension system
  • Suitable for bass reflex or horn loaded designs but also works well in closed box applications
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The PD.185N02 has been designed to provide high fidelity, clean, undistorted, low frequency reproduction with the power handing and performance capabilities expected in pro audio. Very similar in characteristics to the PD.185N01, the PD.185N02 offers an increased BL force factor, over 30T/m, and a modified surround profile designed to limit the excursion of the cone while providing faster transient response. The unit also has a slightly higher power rating of 1100W (AES) and exhibits an average sensitivity of 98dB across its working bandwidth of 35Hz - 1kHz.

Featuring an FEA optimised, compact neodymium motor system configuration that allows more efficient management of the electromagnetic flux and greatly reduced stray magnetic fields. The PD.185N02 is able to provide the same power handling capabilities as much larger ferrite-based motor systems with the added benefit of greatly reduced weight. The motor system configuration and rear vent plate design have been developed in conjunction to allow effective heat dissipation and airflow around the 5", in-house wound, voice coil which aids power handling and reduces power compression effects. A large displacement dual suspension system combines with UK manufactured cone and surround to provide excellent linear control and mechanical stability with extremely low distortion and 45 mm peak to peak excursion before damage. Intended for use as a sub bass driver or woofer in bass reflex and horn loaded systems, the driver's versatility also allows it to be used well in closed box designs.

General Specifications
Nominal Diameter18" / 457.2 mm
Voice Coil Diameter5.0" / 127 mm
Available Impedances4 Ω/ 8 Ω/ 16 Ω
Power Rating 1 2 *1100 W (A.E.S.)
Peak Power (6dB Crest Factor)*4400 W (A.E.S.)
Sensitivity (1W – 1m)*98 dB
Frequency Range35 Hz - 1 kHz
Recommended Enclosure Volume90 - 220 Litres
Resonance35.24 Hz
Voice Coil Winding Depth28 mm / 1.10 "
Magnet Gap Depth12 mm / 0.47 "
Flux Density1.18 Tesla
Magnet MaterialNeodymium
Magnet Weight
Voice Coil MaterialCopper
Former MaterialGlass Fibre
Dust Dome MaterialPaper
Suspension MaterialFabric
Cone MaterialPaper
Surround MaterialFabric
Thiele Small Parameters
Fs35.24 Hz
Re4.7 Ω
Le (@1 kHz)
Le (@10 kHz)0.57 mH
Vas178.281 Litres
Mms219.92 g
Sd1164.16 cm²
Cms0.09 mm/N
BL30.55 T/m
Xmax12 mm
Vd1.397 Litres
Ref. Efficiency3.03%
EBP140.96 Hz


Dimensions & Mounting
Overall Diameter474 mm
Widths Across Flats459 mm
Flange Height14.5 mm
Depth (Excl. Flange)185 mm
Magnet Diameter166 mm
Chassis Shoulder Diameter414.5 mm
Outer Bolt Circle6x M8 on 455 mm PCD
Inner Bolt CircleN/A


Shipping Information
Nett Weight11.5 Kg / 25.35 lb
Shipping Weight12.9 Kg / 28.44 lb
*2.83V. Half space response measured in a 975 Litre sealed Enclosure. Blue Line = fundamental 45° off-axis.

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.

1. AES standard (35 to 350 Hz).
2. AES Recommended Practice.
3. Thiele - Small Parameters follow a 1100 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.

Frequency Response & Impedance
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