Sub Bass Driver

Engineered for minimal weight using traditional ferrite magnet motor
5″ High temperature copper voice coil
3 Kg Y35 ceramic magnet
Double suspension assembly
Triple roll surround straight cone geometry
Straight cone geometry

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The PD.185C001 is ideally suited to applications where high power handling, long excursion and perfect linearity is required. Completely versatile in bass reflex and horn loaded cabinets. TSP’s naturally suit all PD.186 applications but offer increased horsepower and punch.

Conceived around the famed PD.186. The PD.185C001 engineering has been focussed around minimal weight using a traditional ferrite magnet motor system. Weighing in only 13Kg, it's lighter than some neodymium models available on the market today! The robust mechanical design and construction makes this unit an ideal choice for fixed or touring applications.

Frequency Response GRaPH
Impedance GRAPH
General Specifications
Nominal Diameter18" / 457.2 mm
Voice Coil Diameter5.0" / 127 mm
Available Impedances4 Ω/ 8 Ω/ 16 Ω
Power Rating 1 2 *1200 W (A.E.S.)
Peak Power (6dB Crest Factor)*4800 W (A.E.S.)
Sensitivity (1W – 1m)*97 dB
Frequency Range30 Hz - 300 Hz
Recommended Enclosure Volume125 - 200 Litres
Resonance32 Hz
Voice Coil Winding Depth0.98" / 25.00 mm
Magnet Gap Depth9.00 mm / 0.35"
Flux Density0.96 Tesla
Magnet MaterialCeramic
Magnet Weight
Voice Coil MaterialCopper
Former MaterialGlass Fibre
Dust Dome MaterialPaper
Suspension MaterialFabric
Cone MaterialPaper
Surround MaterialFabric
Thiele Small Parameters
Fs32 Hz
Re5.9 Ω
Le (@1 kHz)
Le (@10 kHz)3.800 mH
Vas302 Litres
Mms157.20 g
Sd1162 cm2
Cms157.40 µm/N
BL21.00 T/m
Xmax10.5 mm
Vd1.220 Litres
Ref. Efficiency2.26%
EBP75.65 Hz
Dimensions & Mounting
Overall Diameter18" / 457.2 mm
Widths Across Flats458.73 mm
Flange Height14.50 mm
Depth (Excl. Flange)182.47 mm
Magnet Diameter220 mm
Chassis Shoulder Diameter414.38 mm
Outer Bolt Circlex6 M8 on 456 mm PCD
Inner Bolt CircleN/A


Shipping Information
Nett Weight13.00 Kg / 28.66 lb
Shipping Weight13.50 Kg / 29.76 lb


* 2.83V. 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 (30 to 300 Hz) Program 900 Watts.

2. AES Recommended Practice.

3. Thiele - Small Parameters follow a 900 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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