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Bass / Low-Mid Range 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
  • 5″ High temperature copper voice coil
  • For two way ported applications and bass reinforcement in bass reflex / horn loaded enclosures
  • Rear aluminum heat sink
Klippel Verifeid
Radial Neo Technology


15" / 381 mm

Coil Diameter

5.0" / 127 mm

Power Rating

1000 W (A.E.S.)

Frequency Range

45 Hz - 2 kHz


98.5 dB


12 mm

The PD.155NR1 is intended as a dedicated woofer in bass reflex and horn loaded designs. The unit is also capable as a high power upper 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 5-inch high temperature copper voice coil capable of handling 900W (AES) the PD.155NR1 exhibits an average sensitivity of 97dB across its working band.

£371.88 MRRP Ex. VAT

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Frequency Response Graph
Impedance GRAPH
General Specifications
Type Bass / Low-Mid Range Driver
Available Impedance 4 Ω/ 8 Ω/ 16 Ω
Nominal Diameter 15" / 381 mm
Voice Coil Diameter 5.0" / 127 mm
Peak Power (6 dB Crest Factor) * 4000 W (A.E.S.)
Power Rating 1 2 * 1000 W (A.E.S.)
Sensitivity (1W/ 1m) * 98.5 dB
Frequency Range 45 Hz - 2 kHz
Resonance 37 Hz
Voice Coil Winding Depth 1.20" / 30.50 mm
Recommended Enclosure Volume 75 - 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 37 Hz
Re 5.4 Ω
Qms 6.1
Qes 0.237
Qts 0.228
Le (@ 1 kHz) 2.350 mH
Vas 140 Litres
Mms 154.00 g
Sd 895 cm2
Cms 123.20 µm/N
BL 28.60 T/m
Xmax 12 mm
Vd 0.980 Litres
Ref. Efficiency 2.77%
EBP 156.12 Hz
Dimensions & Mounting
Overall Diameter 408.30 mm
Width Across Flats 395
Flange Height 11.00 mm
Depth (Excl. Flange) 190.00 mm
Magnet Diameter 168 mm
Chassis Shoulder Diameter 356.00 mm
Outer Bolt Circle x6 M6 on 395 mm PCD
Inner Bolt Circle N/A
Shipping Information
Nett Weight 10.00 Kg / 22.05 lb
Shipping Weight 11.00 Kg / 24.25 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 (45 to 450 Hz) Program 800 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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