Bass Driver
  • Discontinued – Special Order / OEM Only
  • Contact info@precision-devices.com 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
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Download PDF Datasheet
General Specifications
Nominal Diameter18" / 457.2 mm
Voice Coil Diameter4.0" / 101.6 mm
Available Impedances4 Ω/ 8 Ω/ 16 Ω
Power Rating 1 2 *700 w (A.E.S.)
Peak Power (6dB Crest Factor)*2800 w (A.E.S.)
Sensitivity (1W – 1m)*97 dB
Frequency Range35 Hz - 3 kHz
Recommended Enclosure Volume100 - 350 Litres
Resonance30.03 Hz
Voice Coil Winding Depth25 mm / 0.98"
Magnet Gap Depth9 mm / 0.35"
Flux Density1.34 Tesla
Magnet MaterialCeramic
Magnet Weight
Voice Coil MaterialCopper
Former MaterialGlass Fibre
Dust Dome MaterialPaper
Suspension MaterialFabric
Cone MaterialPaper
Surround MaterialFabric
Thiele Small Parameters
Fs30.03 Hz
Re5.11 Ω
Le (@1 kHz)
Le (@10 kHz)1.03 mh
Vas308.99 litres
Mms164.2 g
Sd1134.11 cm2
Cms171 µm/N
BL22.03 T/m
Xmax10.5 mm
Vd1.19 litres
Ref. Efficiency2.24%
EBP91 Hz


Dimensions & Mounting
Overall Diameter474 mm
Widths Across Flats458 mm
Flange Height13 mm
Depth (Excl. Flange)175 mm
Magnet Diameter220 mm
Chassis Shoulder Diameter415 mm
Outer Bolt Circle6 * M8 on 456mm PCD
Inner Bolt CircleN/A


Shipping Information
Nett Weight14.2 Kg / 31.31 lb.
Shipping Weight15.6 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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