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Bass / Mid Range Driver
  • Vented cast aluminium chassis for improved thermal control of voice coil
  • Optimised vented voice coil cools and reduces coil gap turbulence
  • Multi roll cone surround profile
  • High BL of 24.5 T/m
Klippel Verifeid


12" / 304.8 mm

Coil Diameter

3.0" / 76.2 mm

Power Rating

600 W (A.E.S.)

Frequency Range

45 Hz - 4 kHz


99 dB


7.5 mm

The PD.123C001 offers excellent linear response well controlled down to 50Hz. It is a very good solution for two way or multi way systems where high BL and good punch is required.

£143.00 MRRP Ex. VAT

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Frequency Response Graph
Impedance GRAPH
General Specifications
TypeBass / Mid Range Driver
Nominal Diameter12" / 304.8 mm
Voice Coil Diameter3.0" / 76.2 mm
Power Rating 1 2 *600 W (A.E.S.)
Available Impedance4 Ω/ 8 Ω/ 16 Ω
Sensitivity (1W/ 1m)*99 dB
Frequency Range45 Hz - 4 kHz
Peak Power (6 dB Crest Factor)2400 W (A.E.S.)
Resonance35 Hz
Voice Coil Winding Depth0.83" / 21.00 mm
Recommended Enclosure Volume35 - 55 Litres
Flux Density1.20 Tesla
Magnet MaterialY30 Ferrite
Magnet Gap Depth11.00 mm / 0.43"
Former MaterialGlass Fibre
Dust Dome MaterialPaper
Voice Coil MaterialCopper
Cone MaterialPaper
Suspension MaterialFabric
Surround MaterialFabric
Thiele Small Parameters
Fs35 Hz
Re5.5 Ω
Le (@ 1 kHz)2.170 mH
Vas122 Litres
Mms70.00 g
Sd547 cm2
Cms288.00 µm/N
BL24.50 T/m
Xmax7.5 mm
Vd0.410 Litres
Ref. Efficiency3.44%
EBP238.10 Hz
Dimensions & Mounting
Overall Diameter331.00 mm
Width Across Flats320 mm
Flange Height10.00 mm
Depth (Excl. Flange)121.00 mm
Magnet Diameter200 mm
Chassis Shoulder Diameter282.00 mm
Outer Bolt Circlex4 M6 318 mm PCD
Inner Bolt Circle(Hidden) x8 M6 on 293 mm PCD
Shipping Information
Nett Weight9.70 Kg / 21.38 lb
Shipping Weight10.75 Kg / 23.69 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 (50 to 500 Hz) Program 400 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.
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