Transcript
PRECISION DEVICES M A D E
I N
E N G L A N D
PD.912
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12” cast aluminium frame 300WRMS 3” copper voice coil assembly 60 oz. ceramic magnet A B/L in excess of 20T/m for tight voicing
APPLICATION NOTES Designed as a general purpose transducer, the PD.912 is anything but standard. Providing optimum performance for nightclub, public address and house of worship applications the PD.912 is a popular and versatile choice. Operating in two way reflex systems, the PD.912 works with distinction in combination with a PD.C2 or PD.C14 compression driver. The generous frequency response ensures eminent suitability with small format high frequency units possessing intrinsically high crossover requirements. Also highly recommended as an upgrade in an existing system.
WORLD HEADQUARTERS Precision Devices Grantley Way Wakefield West Yorkshire WF1 4PY England Telephone: +44 (0) 1924 332188 Fax: +44 (0) 1924 239988 Email:
[email protected] W: www.precision-devices.com FACTORY Precision Devices Jenson House Cardrew Industrial Estate Redruth Cornwall TR15 1SS England
RESPONSE & IMPEDANCE DETAIL
MECHANICAL DATA Dimensions in mm
Nett Weight 6.25 Kg (13.81 Lbs.) 21.7 293.5
279.5
310.5
135
Shipping weight 7 Kg (15.47 Lbs.)
8 Fixing holes M5
Response measured in a half space environment.
TECHNICAL SPECIFICATION Nominal Diameter Power rating 1 Frequency range Nominal Impedance Sensitivity 2 (1 W 1 M) Resonance Enc. Vol. Recommended Displacement limit Voice coil diameter Voice coil Voice coil winding depth Suspension (Spider) Magnet gap depth Magnet material/mass Magnetic assembly total mass Flux Density Cone type/material Surround Dust dome Connectors Polarity
30 cm (12”) 300 Watts 50 to 3.5 kHz 8 Ohms 97 dB 40 Hz 20 to 120 Litres 10 mm (0.39”) 76 mm (3.0”) Copper 15 mm (0.59”) Fabric 8 mm (0.31”) Ceramic/1.7 Kg (60 oz.) 5.3 Kg (11.71 Lbs.) 11,500 Gauss Paper Fabric Paper Spring loaded push button Positive Voltage on Red Terminal gives forward cone motion
Notes 1. AES Standard (60 to 600 Hz) Program 600 Watts 2. AES Recommended Practice.
THIELE - SMALL PARAMETERS Fs L1 Revc L2 Res RMSE-load Qts RMSE-free
41.29 0.98 6.96 1.94 101.50 1.22 0.25 0.62
Hz mH Ohms mH Ohms Ohms Ohms
Qms Vas Qes Mms Sd Cms R2 BL
3.95 97.87 Litres 0.27 60.11 grams 530.93 sq cm 247 µM/N 6.85 Ohms 20.01 T/m
Notes 3. Thiele - Small Parameters follow a 300 Watt preconditioning period.
Precision Devices operate a policy of continuous research and development. The implementation of new materials or production methods will always equal or exceed the published specifications, which may change without notice. Details shown on this sheet are correct at time of printing. March 2004
PD.912
