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Sub Bass Driver
  • Heavy-duty cast aluminium chassis for increased rigidity.
  • Double suspension system.
  • Effective transducer in a variety of versatile applications.
  • Suitable for horn loaded or reflex designs.


18" / 457.2 mm

Coil Diameter

5.0" / 127 mm

Power Rating

700 w (A.E.S.)

Frequency Range

30 Hz - 2 kHz


95 dB


10.5 mm
SKU: PD.186/2.8 Category:

Sorry, this product is out of manufacture and no longer available.

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General Specifications
TypeSub Bass Driver
Nominal Diameter18" / 457.2 mm
Voice Coil Diameter5.0" / 127 mm
Power Rating 1 2 *700 w (A.E.S.)
Available Impedance4 Ω/ 8 Ω/ 16 Ω
Sensitivity (1W/ 1m)*95 dB
Frequency Range30 Hz - 2 kHz
Peak Power (6 dB Crest Factor)2800 w (A.E.S.)
Resonance34.18 Hz
Voice Coil Winding Depth25 mm / 0.98"
Recommended Enclosure Volume100 - 350 Litres
Flux Density0.95 Tesla
Magnet MaterialCeramic
Magnet Gap Depth9 mm / 0.35"
Former MaterialGlass Fibre
Dust Dome MaterialPaper
Voice Coil MaterialCopper
Cone MaterialPaper
Suspension MaterialDual Fabric
Surround MaterialFabric
Thiele Small Parameters
Fs34.18 Hz
Re6.19 Ω
Le (@ 1 kHz)1.95 mh
Vas192.15 litres
Mms203.93 g
Sd1134.11 cm2
Cms106.67 µm/N
BL22.18 T/m
Xmax10.5 mm
Vd1.2 litres
Ref. Efficiency2.05%
EBP62.14 Hz
Dimensions & Mounting
Overall Diameter474 mm
Width Across Flats459 mm
Flange Height14.5 mm
Depth (Excl. Flange)173 mm
Magnet Diameter220 mm
Chassis Shoulder Diameter414.5 mm
Outer Bolt Circle6 * M8 on 455mm PCD
Inner Bolt CircleN/A
Shipping Information
Nett Weight15.1 Kg / 33.28 lb.
Shipping Weight16.5 Kg / 36.37 lb.
*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.

1. AES Standard (40 to 400 Hz) Program 1400 Watts.
2. AES Recommended Practice.
3. Thiele - Small Parameters follow a 700 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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