Haut-parleur 46cm Precision Devices PD.1850
[PD.1850-8] Avis/Critiques 
Designed specifically to provide powerful and accurate bass frequencies with minimal distortion and power compression.
The PD.1850 is the superlative choice for top of the range sub bass systems where the ability to take punishment in the most demanding applications is the ultimate selection criterion.
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. Appropriate for applications as diverse as scoop bins, conventional reflex cabinets and horn loaded systems.
DISPONIBLE EN VERSION 4 et 16 OHM sur commande et par 2 pièces uniquement.
• Heavy duty 18” cast aluminium frame with extra wide flange for increased rigidity
• Sub Woofer
• Field replaceable magnet for touring applications
• 800WRMS
• 5” copper voice coil assembly
• 170 oz. ceramic magnet
• Power compression only 1.6dB 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, improving linear excursion and providing an efficient thermal path to dissipate the heat produced by the voice coil
• A B/L in excess of 31T/m for fast accurate lows
• Double suspension system maintaining a pure piston action for the moving mass even when driven with the most complex programme input signals and provides additional durability against the rigours of life on the road
*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.1850 may significantly exceed
that of other manufacturers with high published power ratings.
*2 Distortion is measured at 10% of the rated power (AES Standard)
Specifications
Nominal Diameter 46cm (18”)
Power rating 1 800 Watts
Frequency range 35 - 2000 Hz
Nominal Impedance 4, 8 or 16 Ohms
Sensitivity 2 (1 W 1 M) 98 dB
Highest Recommended Crossover 3 400 Hz
Resonance 30 Hz
Enc.Vol. Recommended 90 to 220 Litres
Effective Piston Diameter 382 mm (15.05”)
Displacement limit (peak-peak) 34 mm
Voice coil diameter 127 mm (5”)
Voice coil Copper
Voice coil winding depth 28 mm (1.1”)
Voice coil wire length 48.9M (160.5’)
Magnet gap depth 12 mm (0.453”)
Magnet material/mass Ceramic/4.8 Kg (170 oz.)
Flux Density 1.18 T
Cone/Surround Paper/Fabric
Notes
1. AES Standard (35 to 350 Hz) Program 1600 Watts
2. Sensitivity is derived from the sine wave response between 50 - 350 Hz at 5W/2M using Zmin. It is then scaled to represent 1W/1M. 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 30 Hz
Revc 5.4 Ohms
Qts 0.21
Qms 6.04
Vas 249 Litres
Qes 0.22
Mms 216.4 grams
Sd 1150 sq cm
Cms 133 μM/N
BL 31.57 T/m
Xmax 11.05 mm
Vd 13 x 10-4 m3
No 2.88%
Pmx 800 Watts
Notes
4. Thiele - Small Parameters follow a 800 Watt preconditioning period.
Response Detail
Response measured in a half space environment using a vented enclosure of 164 litres.
Mechanical Data
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 2008
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