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


  • 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 Copper voice coil.
  • Triple-roll surround straight cone geometry.
  • For sub bass applications in bass reflex / horn loaded enclosures.
  • Rear aluminum heat sink.


The PD.184NR1 is ideally suited to applications where high power handling, long excursion and perfect linearity is required. The robust mechanical design and construction makes this unit an ideal choice for fixed or touring applications. The PD.184NR1 is intended as a dedicated sub 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 motors temperature under control and reduced power compression to a minimum. The unit features a 4-inch, high temperature, copper voice coil capable of handling 1000W (AES) the PD.184NR1 exhibits an average sensitivity of 97.5dB across its working band.


* 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 (35 to 350 Hz) Program 1000 Watts.

2. AES Recommended Practice.

3. Thiele - Small Parameters follow a 1000 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 Diameter18" / 460 mm
Nominal Impedance4 / 8 / 16 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 Range30 Hz - 800 Hz
Recommended Enclosure Volume90 - 200 Litres
Voice Coil Winding Depth0.87" / 22.00 mm
Magnet Gap Depth11.00 mm / 0.43"
Flux Density1.18 Tesla
Magnet MaterialNeodymium
Magnet WeightN/A
Voice Coil MaterialCopper
Former MaterialGlass Fibre
Dust Dome MaterialSolid Paper
Suspension MaterialPoly Cotton / silicone damping
Cone Surround MaterialPaper / M Roll Poly Cotton
Fs38 Hz
Re5.4 Ω
Le @1k1.890 mH
Le @10k0.880 mH
Vas102 Litres
Mms216.00 g
Sd1164 cm2
Cms99.70 µm/N
BL29.50 T/m
Xmax8.5 mm
Vd0.800 Litres
Reference Efficiency 2.50 %
EBP131.03 Hz
Overall Diameter473.60 mm
Width Across Flats458.73 mm
Flange Height14.50 mm
Depth200.00 mm
Magnet Diameter138 mm
Chassis Shoulder Diameter415.00 mm
Outer Bolt Circlex6 M8 on 456 mm PCD
Inner Bolt CircleN/A
Nett Weight9.60 Kg / 21.16 lb
Shipping Weight10.30 Kg / 22.71 lb
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