Precision Devices International Limited Precision Devices Made in UK
the precision dna PD.155N01 PD.184C01 - Out now PD.123C01 - out now Precision Devices at Palm Expo India 2017

PD.121

  • Heavy-duty cast aluminium chassis for increased rigidity.
  • Mid range transducer suitable for either direct radiating or horn loaded applications.
  • Smooth response for easy integration across vocal frequency band.


*2.83V. Half space response measured in a 35 Litre vented 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.

1. AES Standard (60 to 600 Hz) Program 600 Watts.
2. AES Recommended Practice.
3. Thiele - Small Parameters follow a 300 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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SPECIFICATIONS
Nominal Diameter300 mm / 12"
Voice Coil Diameter63 mm / 2.5"
Nominal Impedance8 Ω
Available In4 Ω/ 8 Ω/ 16 Ω
Power Rating300 w (A.E.S.)
Peak Power (6dB Crest Factor)1200 w (A.E.S.)
Sensitivity (1w / 1m)99 dB
Frequency Range100 Hz - 6 kHz
Recommended Enclosure Volume10 - 60 Litres
Resonance53.27 Hz
Voice Coil Winding Depth12 mm / 0.47"
Magnet Gap Depth9 mm / 0.35"
Flux Density Tesla1.5 Tesla
Magnet MaterialCeramic
Voice Coil MaterialCopper
Former MaterialGlass Fibre
Dust Dome MaterialPaper
Suspension MaterialFabric
Cone Surround MaterialPaper / Fabric
THIELE SMALL PARAMETERS
Fs 53.27 Hz
Re 5.93 Ω
Qms14.66
Qes0.23
Qts0.23
Le 0.42 mh
L2 1.13 mh
R2 12.2 Ω
Vas 66.58 litres
Mms 65.37 g
Sd 530.93 cm2
Cms 168.33 µm/N
BL21.46 T/m
Xmax2.7 mm
Vd0.143 litres
Ref. Efficiency5.10%
MOUNTING AND SHIPPING INFORMATION
Overall Diameter330 mm
Width Across Flats320.5 mm
Flange Height10 mm
Depth (Excl. Flange)115 mm
Magnet Diameter200 mm
Chassis Shoulder Diameter282 mm
Outer Bolt Circle6 * M6 on 318mm PCD
Inner Bolt Circle8 * M6 on 293mm PCD
Nett Weight9.2 Kg / 20.28 lb.
Shipping Weight10 Kg / 22.05 lb.
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