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Sub Bass Driver
  • Out of Manufacture – No longer Available
  • Neodymium magnet assembly
  • Vented chassis with forced air cooling vented voice coil gap
  • Aluminium demodulation ring
  • Dual suspension assembly
  • 5″ High temperature copper voice coil
  • Triple roll surround straight cone geometry
  • For sub bass applications in bass reflex / horn loaded enclosures


18" / 457.2 mm

Coil Diameter

5.0" / 127 mm

Power Rating

1000 W (A.E.S.)

Frequency Range

30 Hz - 300 Hz


97.5 dB


11.5 mm
SKU: PD.185N002.8 Categories: , Tag:

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Frequency Response Graph
Impedance GRAPH
General Specifications
Type Sub Bass Driver
Available Impedance 4 Ω/ 8 Ω/ 16 Ω
Nominal Diameter 18" / 457.2 mm
Voice Coil Diameter 5.0" / 127 mm
Peak Power (6 dB Crest Factor) * 4000 W (A.E.S.)
Power Rating 1 2 * 1000 W (A.E.S.)
Sensitivity (1W/ 1m) * 97.5 dB
Frequency Range 30 Hz - 300 Hz
Resonance 36 Hz
Voice Coil Winding Depth 1.14" / 29.00 mm
Recommended Enclosure Volume 110 - 200 Litres
Flux Density 1.20 Tesla
Magnet Material Neodymium
Magnet Gap Depth 13.50 mm / 0.53"
Former Material Glass Fibre
Dust Dome Material Paper
Voice Coil Material Copper
Cone Material Paper
Suspension Material Poly Cotton
Surround Material Fabric
Thiele Small Parameters
Fs 36 Hz
Re 5.4 Ω
Qms 3.1
Qes 0.329
Qts 0.3
Le (@ 1 kHz) 3.070 mH
Vas 226 Litres
Mms 173.00 g
Sd 1163 cm2
Cms 117.60 µm/N
BL 25.00 T/m
Xmax 11.5 mm
Vd 1.360 Litres
Ref. Efficiency 2.85%
EBP 109.42 Hz
Dimensions & Mounting
Overall Diameter 473.60 mm
Width Across Flats 458.73 mm
Flange Height 14.50 mm
Depth (Excl. Flange) 174.00 mm
Magnet Diameter 180 mm
Chassis Shoulder Diameter 414.38 mm
Outer Bolt Circle x6 M8 on 456 mm PCD
Inner Bolt Circle N/A
Shipping Information
Nett Weight 11.50 Kg / 25.35 lb
Shipping Weight 12.20 Kg / 26.90 lb
* 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.
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