Профессиональный динамик НЧ BEYMA 12BR70. Инструкция на английском языке

12BR70
LOW FREQUENCY TRANSDUCER
www.beyma.com
KEY FEATURES
?  125 W RMS  power handling
?  Sensitivity: 93 dB @ 1 W @ 1 m
?  2” copper voice coil
?  Extended controlled displacement: X max  ± 8 mm
?  Low resonance for low frequency extension
?  Flat frequency response and low distortion
?  Rubber surround
?  Die cast aluminium basket
?  Ferrite magnet
TECHNICAL SPECIFICATIONS                                         DIMENSION DRAWINGS
Nominal diameter                    300 mm    12 in
Rated impedance                                8 ?
Minimum impedance                            6,6 ?
Power capacity*                          125 W RMS
Program power                               250 W
Sensitivity                  93 dB   1W @ 1m @ 2?
Frequency range                       25 - 4.000 Hz
Recom. enclosure vol.       50 / 120 l    1,77 / 4,24 ft 3
Voice coil diameter                52 mm          2 in
Magnetic assembly weight           2,75 kg     6,06 lb
Bl factor                                 12,1 N/A
Moving mass                               0,074 kg
Voice coil length                           19 mm
Air gap height                               7 mm
THIELE-SMALL PARAMETERS**                                        MOUNTING INFORMATION
Resonant frequency, f s                     31 Hz            Overall diameter                 312 mm     12,28 in
D.C. Voice coil resistance, R e              5,6 ?           Bolt circle diameter            294,5 mm     11,59 in
Mechanical Quality Factor, Q ms               4,44           Baffle cutout diameter:
Electrical Quality Factor, Q es               0,56            - Front mount                  277,5 mm    10,93 in
Total Quality Factor, Q ts                    0,50            - Rear mount                     280 mm    11,02 in
Equivalent Air Volume to C ms , V as         142 l           Depth                             125 mm      4,92 in
Mechanical Compliance, C ms             345 µm / N           Net weight                         3,6 kg      7,93 lb
Mechanical Resistance, R ms              3,3 kg / s          Shipping weight                    4,1 kg      9,04 lb
Efficiency, ? 0                            0,76 %
Effective Surface Area, S d              0,054 m 2
Maximum Displacement, X max  ***            8 mm
Displacement Volume, V d                  340 cm 3
Voice Coil Inductance, L e  @ 1 kHz       0,85 mH
Notes:
*  The  power  capaticty  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 X max  is calculated as (L vc  - H ag )/2 + (H ag /3,5), where L vc  is the voice coil length and
H ag  is the air gap height.

12BR70
LOW FREQUENCY TRANSDUCER
www.beyma.com
LOW & MID FREQUENCY TRANSDUCER
FREE AIR IMPEDANCE CURVE
[?]
[Hz]
FREQUENCY RESPONSE AND DISTORTION
[dB]
[Hz]
Note: On axis frequency response measured with loudspeaker
standing on infinite baffle in anechoic chamber, 1W @ 1m
Poligono Industrial Moncada II ? C/. Pont Sec, 1c ? 46113 MONCADA - Valencia (Spain)
? Tel.: (34) 96 130 13 75 ? Fax: (34) 96 130 15 07 ? http://www.beyma.com ? E-mail: beyma@beyma.com ?
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