Haut-parleur Beyma 12P1000Nd
[12P1000Nd-8] Avis/Critiques 
KEY FEATURES :
Real 900 W AES power handling
Sensitivity: 96 dB @ 2.83V
4ohms duo
technology voice coil
Forced air convection circuit for low power
compression
Extended controlled displacement: Xmax ± 8 mm.
Massive
mechanical displacement capability: 52 mm p-p
GENERAL DESCRIPTION :
This model is the result of an extensive and intense research of every single
constituent part of an electro-dynamic loudspeaker, rethinking the basics and
taking care of every detail, to withstand the extreme power conditions it has
been designed to work in.
All this investigation is reflected in the new and
innovative technologies developed by Beyma and applied in this new
transducer. 
TECHNICAL SPECIFICATIONS :
Nominal diameter 300
mm. 12 in.
Rated impedance 8 ohms
Minimum impedance 6.5 ohms
Power
capacity* 900 w AES
Program power 1800 w
Sensitivity 96 dB 2.83v @ 1m @
2p
Frequency range 30 - 2500 Hz
Recom. enclosure vol. 20 / 60 l 0.7 / 2.24
ft.3
Voice coil diameter 100 mm. 4 in.
Magnetic assembly weight 4.62 kg.
10.16 lb.
BL factor 23.5 N / A
Moving mass 0.100 kg.
Voice coil length
21 mm
Air gap height 12 mm
X damage (peak to peak) 52 mm
MOUNTING INFORMATION :
Overall diameter 312 mm. 12.28 in.
Bolt circle diameter 295 mm. 11.61
in.
Baffle cutout diameter:
- Front mount 283 mm. 11.14 in.
- Rear
mount 280 mm. 11.02 in.
Depth 131 mm. 5.16 in.
Volume displaced by driver
4 l 0.14 ft.3
Net weight 5.4 kg. 11.88 lb.
Shipping weight 6.1 kg. 13.42
lb.
THIELE-SMALL PARAMETERS** :
Resonant frequency, fs 47 Hz
D.C. Voice coil resistance, Re 5.1
ohms.
Mechanical Quality Factor, Qms 7.89
Electrical Quality Factor, Qes
0.27
Total Quality Factor, Qts 0.26
Equivalent Air Volume to Cms, Vas 49
l
Mechanical Compliance, Cms 115 mm / N
Mechanical Resistance, Rms 3.7 kg
/ s
Efficiency, ho (%) 1.8
Effective Surface Area, Sd (m2) 0.0550
m2
Maximum Displacement, Xmax*** 8 mm
Displacement Volume, Vd 440
cm3
Voice Coil Inductance, Le @ 1 kHz 2 mH
MATERIALS :
Basket: Cast aluminium
Cone: Paper
Surround: Treated cloth
Voice
coil: Copper wire
Magnet: Neodymium
Notes:
*The power capacity is determined according to
AES2-1984 (r2003) standard.
Program power is defined as the transducer’s
ability to handle normal music program material.
**T-S parameters are
measured after an exercise period using a preconditioning power test.
The
measurements are carried out with a velocity-current laser transducer and will
reflect the long
term parameters (once the loudspeaker has been working for a
short period of time).
***The Xmax is calculated as (Lvc - Hag)/2 + Hag/3.5,
where Lvc is the voice coil length and Hag is
the air gap height. 
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