Sub Bass Driver
  • New Ergonomic, Vented Cast Aluminium Chassis Offers Improved Thermal Control
  • Aluminium Demodulation Ring For Ultra-Low Distortion
  • 4.5” Split Winding Copper Clad Aluminium Voice Coil
  • Vented Long-Throw Motor System / Voice Coil Gap for Reduced Power Compression
  • Optimised Double Silicone Suspension System for Ultimate Cone Control
Klippel Verifeid
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Download PDF Datasheet
Frequency Response GRaPH
Impedance GRAPH
General Specifications
Nominal Diameter18” / 457.2 mm
Voice Coil Diameter4.5” / 114.3 mm
Available Impedances4 / 8 / 16 Ohm
Power Rating 1 2 *1500 W (A.E.S.)
Peak Power (6dB Crest Factor)*6000 W (A.E.S.)
Sensitivity (1W – 1m)*98.8 dB
Frequency Range30 Hz - 1 kHz
Recommended Enclosure Volume200 Litres
Resonance34.1 Hz
Voice Coil Winding Depth16.00 mm / 0.63”
Magnet Gap Depth15.0 mm / 0.59”
Flux Density0.92 Tesla
Magnet MaterialNeodymium
Magnet Weight
Voice Coil MaterialCopper Clad Aluminium
Former MaterialGlass Fibre
Dust Dome MaterialSolid Paper
Suspension MaterialPoly Cotton
Cone MaterialPaper
Surround MaterialM Roll Poly Cotton
Thiele Small Parameters
Fs34.1 Hz
Re4.70 Ω
Le (@1 kHz)-
Le (@10 kHz)1.578 mH
Vas179.04 Litres
Mms231.489 g
Sd1158.12 cm2
Cms0.094 mm/N
BL26.424 T/m
Xmax16.00 mm
Ref. Efficiency2.65%
EBP102.40 Hz
Dimensions & Mounting
Overall Diameter18” / 457.2 mm
Widths Across Flats459 mm
Flange Height14.5 mm
Depth (Excl. Flange)TBC
Magnet DiameterTBC
Chassis Shoulder Diameter415 mm
Outer Bolt Circlex6 M6 on 456 mm PCD
Inner Bolt Circle


Shipping Information
Nett Weight10.90 kg / 24.03 lb
Shipping WeightTBC


* 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 (--- to --- Hz). Program ---- Watts.
2. AES Recommended Practice.
3. Thiele - Small Parameters follow a ---- Watt preconditioning period verified by Klippel LSI measurement.
4. 2.83V. Half space response measured in a 975 Litre sealed enclosure.

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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