Transcript
PRECISION DEVICES M A D E
I N
E N G L A N D
PD.1550
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Heavy duty 15” cast aluminium frame with extra wide flange for increased rigidity 600WRMS 4” copper voice coil assembly 110 oz. ceramic magnet Power compression only 2.7dB at rated power*1 Distortion *2 2nd Harmonic <1% 3rd Harmonic <1% Advanced magnetic assembly incorporating a composite alloy and steel pole piece giving a uniform and stable magnetic field Improved linear excursion and efficient thermal path to effectively dissipate heat produced by the voice coil A B/L in excess of 26T/m which contributes to the speed, accuracy and fidelity of the unit maintaining control of the cone under the most demanding operating conditions Exemplary electro-acoustic performance and long term reliability in all types of professional applications
APPLICATION NOTES Designed specifically to provide powerful and accurate bass frequencies with minimal distortion and power compression. Suitable for sound reinforcement in a variety of enclosure types since it allows enclosure designers considerably more freedom with specialised loading techniques without having to make allowances for physical characteristics or power handling limitations which are typically the result of more traditional designs. *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 PD.1550 may significantly exceed that of other manufacturers with high published power ratings. *2 Distortion is measured at 10% of the rated power (AES standard)
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 14.5 Kg (31.9 Lbs.) 11
394 370
352
407
161
6 Fixing holes M6 8 Concealed M6
Shipping weight 15.75 Kg (34.65 Lbs.)
Response measured in a half space environment using a vented enclosure of 107 litres.
TECHNICAL SPECIFICATION Nominal Diameter Power rating 1 Frequency range Nominal Impedance Sensitivity 2 (1 W 1 M) Highest Recommended Crossover 3 Resonance Enc. Vol. Recommended Effective Piston Diameter Displacement limit Voice coil diameter Voice coil Voice coil winding depth Voice coil wire length Magnet gap depth Magnet material/mass Magnetic assembly total mass Flux Density BL product Effective Moving Mass Connectors Polarity
38cm (15”) 600 Watts 40 - 2000 Hz 8 Ohms 99 dB 450 Hz 31 Hz 80 to 200 Litres 336 mm (13.24”) 24 mm (0.94”) 101 mm (4”) Copper 22 mm (0.87”) 37.3M (122.5’) 10 mm (0.394”) Ceramic/3.0 Kg (110 oz.) 10.9 Kg (24 Lbs.) 11,500 Gauss 26.34 Tesla/M 123.4 grams Spring loaded push button metal bodied Positive Voltage on Red Terminal gives forward cone motion
Notes 1. AES Standard (40 to 400 Hz) Program 1200 Watts 2. Sensitivity is derived from the sine wave response between 60 - 450 Hz at 5W/2M using Zmin. It should be noted that not all manufacturers’ sensitivity figures are based on this AES Recommended Practice. 3. In less demanding applications, the crossover point may be higher.
THIELE - SMALL PARAMETERS Fs Xmax Revc Vd Qts No Qms
31 Hz 8 mm 6.4 Ohms 7x10-4 m3 0.21 3.14% 5.55
Pmx Qes Cms Vas Mms Sd BL
600 Watts 0.22 215 µM/N 242 Litres 123.4 grams 890 sq cm 26.34 T/m
Notes 4. Thiele - Small Parameters follow a 600 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.1550
