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Sub Bass Driver
  • New Ergonomic, Vented Cast Aluminium Chassis Offers Improved Thermal Control
  • Aluminium Demodulation Ring For Ultra-Low Distortion
  • 4.5” Split Winding Copper Clad Aluminium Voice Coil
  • Vented Long-Throw Motor System / Voice Coil Gap for Reduced Power Compression
  • Optimised Double Silicone Suspension System for Ultimate Cone Control
Klippel Verifeid


18” / 457.2 mm

Coil Diameter

4.5” / 114.3 mm

Power Rating

1500 W (A.E.S.)

Frequency Range

30 Hz - 1 kHz


98.8 dB


16.00 mm

Bringing recent advancements in Precision Devices transducer technology to the foreground. The PD.1845-1N is a next-generation 18-inch, light weight subwoofer that provides incredible levels of power handling, high SPL output and exceptional low frequency extension; perfect for delivering powerful and accurate bass in compact reflex and horn-loaded enclosure designs.

The PD.1845-1N's vented cast-aluminium chassis and forced-air cooled, long-throw motor system houses a strong neodymium magnet and a new 37mm long, 4.5-inch diameter, four-layer, Copper-clad aluminium voice coil design on an angular split, ventilated, glass fibre bobbin. Effective thermal management in the motor system and voice coil gap decreases the energy lost to heat which allows for extreme power handling, low power compression and incredible overall audio performance.

Coupled with an optimised compliance, double silicone suspension system and triple-roll surround that provides 16mm Xmax and ultimate cone control at high excursion along with an aluminium demodulation ring to reduce inductance and provide ultra-low distortion. The PD.1845-1N exhibits 98.8dB sensitivity across its working frequency band of 30Hz - 1kHz with a rated power handling of 1500 watts AES.

£378.40 MRRP Ex. VAT

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Frequency Response Graph
Impedance GRAPH
General Specifications
TypeSub Bass Driver
Nominal Diameter18” / 457.2 mm
Voice Coil Diameter4.5” / 114.3 mm
Power Rating 1 2 *1500 W (A.E.S.)
Available Impedance4 / 8 / 16 Ohm
Sensitivity (1W/ 1m)*98.8 dB
Frequency Range30 Hz - 1 kHz
Peak Power (6 dB Crest Factor)6000 W (A.E.S.)
Resonance34.1 Hz
Voice Coil Winding Depth37.00 mm / 1.45”
Recommended Enclosure Volume200 Litres
Flux Density0.92 Tesla
Magnet MaterialNeodymium
Magnet Gap Depth15.0 mm / 0.59”
Former MaterialGlass Fibre
Dust Dome MaterialSolid Paper
Voice Coil MaterialCopper Clad Aluminium
Cone MaterialPaper
Suspension MaterialPoly Cotton
Surround MaterialM Roll Poly Cotton
Thiele Small Parameters
Fs34.1 Hz
Re4.70 Ω
Le (@ 1 kHz)1.578 mH
Le (@10 kHz)-
Vas179.04 Litres
Mms231.489 g
Sd1158.12 cm2
Cms0.094 mm/N
BL26.424 T/m
Xmax16.00 mm
Ref. Efficiency2.65%
EBP102.40 Hz
Dimensions & Mounting
Overall Diameter474 mm
Width Across Flats459 mm
Flange Height14.5 mm
Depth (Excl. Flange)200 mm
Magnet Diameter150 mm
Chassis Shoulder Diameter415 mm
Outer Bolt Circlex6 M8 on 455 mm PCD
Shipping Information
Nett Weight10.90 kg / 24.03 lb
Shipping Weight12.90 kg / 28.43 lb
* 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.

1. AES Standard (--- to --- Hz). Program ---- Watts.
2. AES Recommended Practice.
3. Thiele - Small Parameters follow a ---- Watt preconditioning period verified by Klippel LSI measurement.
4. 2.83V. Half space response measured in a 975 Litre sealed enclosure.

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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