PD.123NR1

Bass / Mid Range Driver
  • Out of Manufacture – No longer Available
  • Radial Neodymium Motor structure
  • Vented cast aluminium chassis for improved thermal control of voice coil
  • Forced air cooling vented voice coil gap
  • Aluminium demodulation ring
  • 3″ High temperature Copper voice coil
  • Rear aluminium heat sink
Radial Neo Technology
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Download PDF Datasheet
Frequency Response GRaPH
Impedance GRAPH
General Specifications
Nominal Diameter12" / 304.8 mm
Voice Coil Diameter3.0" / 76.2 mm
Available Impedances4 Ω/ 8 Ω/ 16 Ω
Power Rating 1 2 *550 W (A.E.S.)
Peak Power (6dB Crest Factor)*2200 W (A.E.S.)
Sensitivity (1W – 1m)*99 dB
Frequency Range45 Hz - 3.5 kHz
Recommended Enclosure Volume25 - 70 Litres
Resonance43 Hz
Voice Coil Winding Depth0.77" / 19.50 mm
Magnet Gap Depth10.00 mm / 0.39"
Flux Density1.25 Tesla
Magnet MaterialNeodymium
Magnet Weight
Voice Coil MaterialCopper
Former MaterialGlass Fibre
Dust Dome MaterialSolid Paper
Suspension MaterialFabric
Cone MaterialPaper
Surround MaterialM Roll Poly Cotton
Thiele Small Parameters
Fs43 Hz
Re5.5 Ω
Qms6.5
Qes0.207
Qts0.2
Le (@1 kHz)
Le (@10 kHz)1.870 mH
Vas96 Litres
Mms56.00 g
Sd533 cm2
Cms244.00 µm/N
BL20.50 T/m
Xmax7.5 mm
Vd0.370 Litres
Ref. Efficiency3.65%
EBP207.73 Hz
Dimensions & Mounting
Overall Diameter12" / 304.8 mm
Widths Across Flats320 mm
Flange Height10.00 mm
Depth (Excl. Flange)141.00 mm
Magnet Diameter120 mm
Chassis Shoulder Diameter279.50 mm
Outer Bolt Circlex4 M6 on 318 mm PCD
Inner Bolt CircleN/A

 

Shipping Information
Nett Weight5.70 Kg / 12.57 lb
Shipping Weight6.30 Kg / 13.89 lb

 

Notes
* Half space response measured in a 950 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 (45 to 450 Hz) Program 550 Watts.

2. AES Recommended Practice.

3. Thiele - Small Parameters follow a 500 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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