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Sub Bass Driver
  • Discontinued – Special Order / OEM Only
  • Contact info@precision-devices.com for order information
  • Heavy-duty cast aluminium Chassis for increased rigidity
  • Easy integration with 1″ or 2″ compression drivers
  • Complimented by PDN.10/12MH25
  • Effective transducer in a variety of versatile applications
  • A B/L in excess of 28 T/m
  • Also suitable for horn loaded/bandpass sub bass designs
  • Lightweight neodymium magnet assembly


18" / 457.2 mm

Coil Diameter

4.0" / 101.6 mm

Power Rating

600 w (A.E.S.)

Frequency Range

40 Hz - 3.5 kHz


98 dB


6 mm
SKU: PDN.18SB40.8 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 Diameter4.0" / 101.6 mm
Power Rating 1 2 *600 w (A.E.S.)
Available Impedance4 Ω/ 8 Ω/ 16 Ω
Sensitivity (1W/ 1m)*98 dB
Frequency Range40 Hz - 3.5 kHz
Peak Power (6 dB Crest Factor)2400 w (A.E.S.)
Resonance37.28 Hz
Voice Coil Winding Depth19 mm / 0.75"
Recommended Enclosure Volume100 - 350 Litres
Flux Density1.2 Tesla
Magnet MaterialNeodymium
Magnet Gap Depth11 mm / 0.43"
Former MaterialGlass Fibre
Dust Dome MaterialPaper
Voice Coil MaterialCopper
Cone MaterialPaper
Suspension MaterialDual Fabric
Surround MaterialFabric
Thiele Small Parameters
Fs37.28 Hz
Re5.62 Ω
Le (@ 1 kHz)1.36 mh
Vas211.29 litres
Mms164.25 g
Sd1164.16 cm2
Cms111 µm/N
BL28.59 T/m
Xmax6 mm
Vd0.68 litres
Ref. Efficiency3.29%
EBP143.38 Hz
Dimensions & Mounting
Overall Diameter474 mm
Width Across Flats458 mm
Flange Height13 mm
Depth (Excl. Flange)172 mm
Magnet Diameter182 mm
Chassis Shoulder Diameter415 mm
Outer Bolt Circle6 * M8 on 456mm PCD
Inner Bolt CircleN/A
Shipping Information
Nett Weight8.5 Kg / 18.74 lb.
Shipping Weight9.75 Kg / 21.49 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 1200 Watts.
2. AES Recommended Practice.
3. Thiele - Small Parameters follow a 600 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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