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


  • 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 reflex and horn loaded design enclosures.
  • Rear aluminum heat sink.


The PD.154NR1 is intended as a high power upper 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 700W (AES) the PD.154NR1 exhibits an average sensitivity of 97dB across its working band and will produce an SPL of 127.5 dB in an 85Ltr ported enclosure tuned to 50Hz.


* 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 700 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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Nominal Diameter15" / 381 mm
Nominal Impedance4 / 8 / 16 Ω
Voice Coil Diameter4.0" / 101.6 mm
Power Rating900 W (A.E.S.)
Peak Power (6dB Crest Factor)3600 W (A.E.S.)
Sensitivity (1w / 1m)99 dB
Frequency Range45 Hz - 4 kHz
Recommended Enclosure Volume75 - 200 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
Fs46 Hz
Re6.1 Ω
Le @1k1.730 mH
Le @10k0.700 mH
Vas158 Litres
Mms84.00 g
Sd897 cm2
Cms138.00 µm/N
BL18.50 T/m
Xmax8.5 mm
Vd0.760 Litres
Reference Efficiency 3.50 %
EBP106.98 Hz
Overall Diameter473.60 mm
Width Across Flats458.73 mm
Flange Height14.00 mm
Depth210.00 mm
Magnet Diameter138 mm
Chassis Shoulder Diameter415.00 mm
Outer Bolt Circlex6 M8 on 394 mm PCD
Inner Bolt CircleN/A
Nett Weight8.00 Kg / 17.64 lb
Shipping Weight8.40 Kg / 18.52 lb
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