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Bass Driver
  • Discontinued – Special Order / OEM Only
  • Contact for order information
  • Heavy-duty cast aluminium chassis for increased rigidity
  • A B/L in excess of 24 T/m
  • Smooth bass response in a reflex enclosure
  • Suitable for use in small compact full range systems
  • Easy integration with 1″ or 2″ compression drivers


12" / 300 mm

Coil Diameter

3.0" / 76 mm

Power Rating

400 w (A.E.S.)

Frequency Range

45 Hz - 3.5 kHz


98 dB


4.7 mm
SKU: PD.122.8 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 12" / 300 mm
Voice Coil Diameter 3.0" / 76 mm
Peak Power (6 dB Crest Factor) * 1600 w (A.E.S.)
Power Rating 1 2 * 400 w (A.E.S.)
Sensitivity (1W/ 1m) * 98 dB
Frequency Range 45 Hz - 3.5 kHz
Resonance 59.23 Hz
Voice Coil Winding Depth 17 mm / 0.67"
Recommended Enclosure Volume 30 -120 Litres
Flux Density 1.32 Tesla
Magnet Material Ceramic
Magnet Gap Depth 11 mm / 0.43"
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 59.23 Hz
Re 5.91 Ω
Qms 15.9
Qes 0.24
Qts 0.24
Le (@ 1 kHz) 0.69 mh
Vas 44.03 litres
Mms 65.12 g
Sd 530.93 cm2
Cms 110.89 µm/N
BL 24.29 T/m
Xmax 4.7 mm
Vd 0.259 litres
Ref. Efficiency 3.47%
EBP 246.79 Hz
Dimensions & Mounting
Overall Diameter 330 mm
Width Across Flats 320.5 mm
Flange Height 10 mm
Depth (Excl. Flange) 118 mm
Magnet Diameter 200 mm
Chassis Shoulder Diameter 282 mm
Outer Bolt Circle 6 * M6 on 318mm PCD
Inner Bolt Circle 8 * M6 on 293mm PCD
Shipping Information
Nett Weight 9.7 Kg / 21.38 lb.
Shipping Weight 10.65 Kg / 23.48 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 (60 to 600 Hz) Program 800 Watts.
2. AES Recommended Practice.
3. Thiele - Small Parameters follow a 400 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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