Sub Bass Driver
  • Out of Manufacture – No longer Available
  • Vented cast aluminium chassis for improved thermal control of voice coil
  • Aluminium demodulation ring
  • Flat wire 4″ high temperature copper voice coil
  • Triple roll surround straight cone geometry
  • For sub bass applications in bass reflex enclosures
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Download PDF Datasheet
Frequency Response GRaPH
Impedance GRAPH
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 *800 W (A.E.S.)
Peak Power (6dB Crest Factor)*3200 W (A.E.S.)
Sensitivity (1W – 1m)*98 dB
Frequency Range35 Hz - 500 kHz
Recommended Enclosure Volume90 - 200 Litres
Resonance34 Hz
Voice Coil Winding Depth1.02" / 26.00 mm
Magnet Gap Depth13.00 mm / 0.51"
Flux Density1.10 Tesla
Magnet MaterialCeramic
Magnet Weightfield_5f61288f684d60
Voice Coil MaterialCopper Flat Wire
Former MaterialGlass Fibre
Dust Dome MaterialSolid Paper
Suspension MaterialPoly Cotton
Cone MaterialFibre loaded paper
Surround MaterialPoly cotton
Thiele Small Parameters
Fs34 Hz
Re5.2 Ω
Le (@1 kHz)
Le (@10 kHz)2.240 mH
Vas305 Litres
Mms128.00 g
Sd1152 cm2
Cms164.00 µm/N
BL21.00 T/m
Xmax9.7 mm
Vd1.120 Litres
Ref. Efficiency3.55%
EBP103.03 Hz
Dimensions & Mounting
Overall Diameter18" / 457.2 mm
Widths Across Flats458.73 mm
Flange Height14.50 mm
Depth (Excl. Flange)176.00 mm
Magnet Diameter220 mm
Chassis Shoulder Diameter414.38 mm
Outer Bolt Circlex6 M8 on 456 mm PCD
Inner Bolt CircleN/A


Shipping Information
Nett Weight15.50 Kg / 34.17 lb
Shipping Weight16.00 Kg / 35.27 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 (35 to 350 Hz)

2. AES Recommended Practice.

3. Thiele - Small Parameters follow a 800 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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