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Bass Driver
  • Discontinued – Special Order / OEM Only
  • Contact for order information
  • Heavy-duty cast aluminium chassis for increased rigidity
  • A smooth extended mid range to allow easy crossover integration
  • Suitable for bass reflex designs


18" / 457.2 mm

Coil Diameter

4.0" / 101.6 mm

Power Rating

700 w (A.E.S.)

Frequency Range

35 Hz - 3 kHz


97 dB


10.5 mm
SKU: PD.18BR40.8 Category:

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

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General Specifications
Type Bass Driver
Available Impedance 4 Ω/ 8 Ω/ 16 Ω
Nominal Diameter 18" / 457.2 mm
Voice Coil Diameter 4.0" / 101.6 mm
Peak Power (6 dB Crest Factor) * 2800 w (A.E.S.)
Power Rating 1 2 * 700 w (A.E.S.)
Sensitivity (1W/ 1m) * 97 dB
Frequency Range 35 Hz - 3 kHz
Resonance 30.03 Hz
Voice Coil Winding Depth 25 mm / 0.98"
Recommended Enclosure Volume 100 - 350 Litres
Flux Density 1.34 Tesla
Magnet Material Ceramic
Magnet Gap Depth 9 mm / 0.35"
Former Material Glass Fibre
Dust Dome Material Paper
Voice Coil Material Copper
Cone Material Paper
Suspension Material Fabric
Surround Material Fabric
Thiele Small Parameters
Fs 30.03 Hz
Re 5.11 Ω
Qms 10.21
Qes 0.33
Qts 0.32
Le (@ 1 kHz) 1.03 mh
Vas 308.99 litres
Mms 164.2 g
Sd 1134.11 cm2
Cms 171 µm/N
BL 22.03 T/m
Xmax 10.5 mm
Vd 1.19 litres
Ref. Efficiency 2.24%
EBP 91 Hz
Dimensions & Mounting
Overall Diameter 474 mm
Width Across Flats 458 mm
Flange Height 13 mm
Depth (Excl. Flange) 175 mm
Magnet Diameter 220 mm
Chassis Shoulder Diameter 415 mm
Outer Bolt Circle 6 * M8 on 456mm PCD
Inner Bolt Circle N/A
Shipping Information
Nett Weight 14.2 Kg / 31.31 lb.
Shipping Weight 15.6 Kg / 34.39 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 (50 to 500 Hz) Program 700 Watts.
2. AES Recommended Practice.
3. Thiele - Small Parameters follow a700 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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