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Sub Bass Driver
  • 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
Klippel Verifeid
Radial Neo Technology


18" / 457.2 mm

Coil Diameter

4.0" / 101.6 mm

Power Rating

1000 W (A.E.S.)

Frequency Range

30 Hz - 800 Hz


99 dB


8.5 mm

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 PD.184NR1 features a 4-inch, high temperature, copper voice coil capable of handling 1000W (AES) exhibiting an average sensitivity of 97.5dB across its working band.

SKU: PD.184NR1.8 Categories: , , Tag:


This model is part of our OEM series and will be manufactured to order, please get in touch with us for more information.

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Frequency Response Graph
Impedance GRAPH
General Specifications
Type Sub Bass Driver
Available Impedance 4 Ω/ 8 Ω/ 16 Ω
Nominal Diameter 18" / 457.2 mm
Voice Coil Diameter 4.0" / 101.6 mm
Peak Power (6 dB Crest Factor) * 4000 W (A.E.S.)
Power Rating 1 2 * 1000 W (A.E.S.)
Sensitivity (1W/ 1m) * 99 dB
Frequency Range 30 Hz - 800 Hz
Resonance 38 Hz
Voice Coil Winding Depth 0.87" / 22.00 mm
Recommended Enclosure Volume 90 - 200 Litres
Flux Density 1.18 Tesla
Magnet Material Neodymium
Magnet Gap Depth 11.00 mm / 0.43"
Former Material Glass Fibre
Dust Dome Material Solid Paper
Voice Coil Material Copper
Cone Material Paper
Suspension Material Poly Cotton / silicone damping
Surround Material M Roll Poly Cotton
Thiele Small Parameters
Fs 38 Hz
Re 5.4 Ω
Qms 6.17
Qes 0.29
Qts 0.27
Le (@ 1 kHz) 1.890 mH
Vas 102 Litres
Mms 216.00 g
Sd 1164 cm2
Cms 99.70 µm/N
BL 29.50 T/m
Xmax 8.5 mm
Vd 0.800 Litres
Ref. Efficiency 2.50%
EBP 131.03 Hz
Dimensions & Mounting
Overall Diameter 474 mm
Width Across Flats 459 mm
Flange Height 14.5 mm
Depth (Excl. Flange) 200 mm
Magnet Diameter 138 mm
Chassis Shoulder Diameter 415 mm
Outer Bolt Circle x6 M8 on 456 mm PCD
Inner Bolt Circle N/A
Shipping Information
Nett Weight 9.60 Kg / 21.16 lb
Shipping Weight 10.30 Kg / 22.71 lb
* 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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