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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
Type Bass / Mid Range Driver
Available Impedance 4 Ω/ 8 Ω/ 16 Ω
Nominal Diameter 12" / 304.8 mm
Voice Coil Diameter 3.0" / 76.2 mm
Peak Power (6 dB Crest Factor) * 2400 W (A.E.S.)
Power Rating 1 2 * 600 W (A.E.S.)
Sensitivity (1W/ 1m) * 99 dB
Frequency Range 45 Hz - 4 kHz
Resonance 35 Hz
Voice Coil Winding Depth 0.83" / 21.00 mm
Recommended Enclosure Volume 35 - 55 Litres
Flux Density 1.20 Tesla
Magnet Material Y30 Ferrite
Magnet Gap Depth 11.00 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 35 Hz
Re 5.5 Ω
Qms 7.5
Qes 0.147
Qts 0.144
Le (@ 1 kHz) 2.170 mH
Vas 122 Litres
Mms 70.00 g
Sd 547 cm2
Cms 288.00 µm/N
BL 24.50 T/m
Xmax 7.5 mm
Vd 0.410 Litres
Ref. Efficiency 3.44%
EBP 238.10 Hz
Dimensions & Mounting
Overall Diameter 331.00 mm
Width Across Flats 320 mm
Flange Height 10.00 mm
Depth (Excl. Flange) 121.00 mm
Magnet Diameter 200 mm
Chassis Shoulder Diameter 282.00 mm
Outer Bolt Circle x4 M6 318 mm PCD
Inner Bolt Circle (Hidden) x8 M6 on 293 mm PCD
Shipping Information
Nett Weight 9.70 Kg / 21.38 lb
Shipping Weight 10.75 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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