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Sub Bass Driver
(1 customer review)
  • 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
  • 5″ High temperature copper voice coil
  • Triple-roll surround straight cone geometry
  • For sub bass applications in bass reflex / horn loaded enclosures
Klippel Verifeid
Radial Neo Technology


18" / 457.2 mm

Coil Diameter

5.0" / 127 mm

Power Rating

1400 W (A.E.S.)

Frequency Range

30 Hz - 800 Hz


97.5 dB


11.75 mm

The PD.185NR1 is ideally suited to applications where high power handling, long excursion and perfect linearity is required. Ideal for bass reflex design cabinets.

The robust mechanical design and construction makes this unit an ideal choice for fixed or touring applications. 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 5-inch, high temperature, copper voice coil capable of handling 1400W (AES) the PD.185NR1 exhibits an average sensitivity of 96dB across its working band.

£415.06 MRRP Ex. VAT

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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 5.0" / 127 mm
Peak Power (6 dB Crest Factor) * 5600 W (A.E.S.)
Power Rating 1 2 * 1400 W (A.E.S.)
Sensitivity (1W/ 1m) * 97.5 dB
Frequency Range 30 Hz - 800 Hz
Resonance 34 Hz
Voice Coil Winding Depth 1.20" / 30.50 mm
Recommended Enclosure Volume 90 - 200 Litres
Flux Density 1.18 Tesla
Magnet Material Neodymium
Magnet Gap Depth 13.00 mm / 0.51"
Former Material Glass Fibre
Dust Dome Material Solid Paper
Voice Coil Material Copper
Cone Material Paper
Suspension Material Poly Cotton
Surround Material M Roll Poly Cotton
Thiele Small Parameters
Fs 34 Hz
Re 5.4 Ω
Qms 6.17
Qes 0.29
Qts 0.27
Le (@ 1 kHz) 2.490 mH
Vas 102 Litres
Mms 216.00 g
Sd 1164 cm2
Cms 99.70 µm/N
BL 29.50 T/m
Xmax 11.75 mm
Vd 1.400 Litres
Ref. Efficiency 2.50%
EBP 117.24 Hz
Dimensions & Mounting
Overall Diameter 474 mm
Width Across Flats 459 mm
Flange Height 14.50 mm
Depth (Excl. Flange) 210.00 mm
Magnet Diameter 168 mm
Chassis Shoulder Diameter 415 mm
Outer Bolt Circle x6 M8 on 456 mm PCD
Inner Bolt Circle N/A
Shipping Information
Nett Weight 12.73 Kg / 28.06 lb
Shipping Weight 13.20 Kg / 29.10 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.
What people are saying about the PD.185NR1

Please take a moment to share your feedback with us. We love to hear your success stories and comments about our products. It can really help us, and other PD customers, on our continuing mission of creating better sound.

1 review for PD.185NR1

  1. Nicolae (verified owner)

    Thank you for a wonderful product, your speakers sound very good, we managed to make a Bass reflex horn hybrid enclosure project

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