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PD.124NR1

  • 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.
  • Dual spider configuration with silicone based damping control.
  • 4" High temperature CCAW voice coil.
  • For two way ported applications and bass reinforcement in horn loaded designs.
  • Rear aluminium heat sink.

 

The PD.124NR1 is intended as a high power mid bass driver in multiway systems. The unit can also be used as a dedicated woofer in bass reflex and horn loaded designs. The optimised radial neodymium motor system allows more efficient management of the magnetic flux. Forced air venting and rear aluminium base plate keeps the motor temperature under control and reduces power compression to a minimum. The unit features a 4-inch, high temperature, CCAW voice coil capable of handling 800W (AES). The PD.154NR1 exhibits an average sensitivity of 97dB across its working band and will produce an SPL of 126.5 dB in an 45Ltr ported enclosure tuned to 60Hz.

 


* 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 (55 to 550 Hz) Program 1000 Watts.

2. AES Recommended Practice.

3. Thiele - Small Parameters follow a 800 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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SPECIFICATIONS
Nominal Diameter12" / 304.8 mm
Nominal Impedance8 Ω
Voice Coil Diameter4.0" / 101.6 mm
Power Rating1000 W (A.E.S.)
Peak Power (6dB Crest Factor)4000 W (A.E.S.)
Sensitivity (1w / 1m)99 dB
Frequency Range45 Hz - 4 kHz
Recommended Enclosure Volume25 - 70 Litres
Voice Coil Winding Depth0.87" / 22.00 mm
Magnet Gap Depth11.00 mm / 0.43"
Flux Density1.25 Tesla
Magnet MaterialNeodymium
Magnet WeightN/A
Voice Coil MaterialCopper Clad Aluminium
Former MaterialGlass Fibre
Dust Dome MaterialSolid Paper
Suspension MaterialPoly Cotton / silicone damping
Cone Surround MaterialPaper / M Roll Poly Cotton
THIELE SMALL PARAMETERS
Fs58 Hz
Re6.1 Ω
Qms8.200
Qes0.370
Qts0.350
Le @1k2.600 mH
Le @10k0.750 mH
Vas49 Litres
Mms60.00 g
Sd540 cm2
Cms119.00 µm/N
BL19.20 T/m
Xmax8.5 mm
Vd0.590 Litres
Reference Efficiency 2.52 %
EBP156.76 Hz
MOUNTING AND SHIPPING INFORMATION
Overall Diameter331.00 mm
Width Across Flats320 mm
Flange Height10.00 mm
Depth146.00 mm
Magnet Diameter138 mm
Chassis Shoulder Diameter280.00 mm
Outer Bolt Circlex4 M6 on 318 mm PCD
Inner Bolt CircleN/A
Nett Weight7.00 Kg / 15.43 lb
Shipping Weight7.50 Kg / 16.53 lb
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