Precision Devices International Limited Precision Devices Made in UK
Precision Devices PD.CD1N the precision dna Precision Devices Compression Driver Range - Out Now Precision Devices PD.CD1.5NR1 Precision Devices - Exporting Is Great


No Longer Available
  • 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.


The PD.123NR1 is intended for use in two way ported enclosures or as a high power mid bass driver in multiway systems. 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 3-inch, high temperature, copper voice coil capable of handling 550W (AES) and exhibits an average sensitivity of 98dB across its working band producing an SPL of 126.5 dB in a 55Ltr ported enclosure tuned to 55Hz.


* 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.

Select Country
Select Location
(Town / Zip / Post Code)
Nominal Diameter12" / 304.8 mm
Nominal Impedance8 Ω
Voice Coil Diameter3.0" / 76.2 mm
Power Rating550 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
Voice Coil Winding Depth0.77" / 19.50 mm
Magnet Gap Depth10.00 mm / 0.39"
Flux Density1.25 Tesla
Magnet MaterialNeodymium
Magnet WeightN/A
Voice Coil MaterialCopper
Former MaterialGlass Fibre
Dust Dome MaterialSolid Paper
Suspension MaterialFabric
Cone Surround MaterialPaper / M Roll Poly Cotton
Fs43 Hz
Re5.5 Ω
Le @1k1.870 mH
Le @10k0.900 mH
Vas96 Litres
Mms56.00 g
Sd533 cm2
Cms244.00 µm/N
BL20.50 T/m
Xmax7.5 mm
Vd0.370 Litres
Reference Efficiency 3.65 %
EBP207.73 Hz
Overall Diameter330.00 mm
Width Across Flats320 mm
Flange Height10.00 mm
Depth141.00 mm
Magnet Diameter120 mm
Chassis Shoulder Diameter279.50 mm
Outer Bolt Circlex4 M6 on 318 mm PCD
Inner Bolt CircleN/A
Nett Weight5.70 Kg / 12.57 lb
Shipping Weight6.30 Kg / 13.89 lb
© Precision Devices Ltd, all rights reserved. Site developed by Edoru web design Wakefield
Investors In People