Профессиональный динамик СЧ/НЧ BEYMA BF8R. Инструкция на английском языке

BF-8R
LOW FREQUENCY TRANSDUCER
www.beyma.com
KEY FEATURES
?  100 W program power.
?  90 dB, 2,83V @ 1m sensitivity.
?  Extended controlled displacement: X max  ± 5,7 mm.
?  Foam surround for extended bass response.
?  Smooth and flat response and low distortion.
?  Suited for bass and midbass applications, sealed or
vented small cabinets.
?  Steel basket.
?  Ferrite magnet.
DIMENSION DRAWINGS
TECHNICAL SPECIFICATIONS
Nominal diameter                      200 mm    8 in
Rated impedance                                8 ?
Minimum impedance                             6,8 ?
Power capacity*                           50 W RMS
Program power                                100 W
Sensitivity                 90 dB   2.83v @ 1m @ 2p
Frequency range                        30 - 6.000 Hz
Recom. enclosure vol.        15 / 40 l     0,53 / 1,41 ft 3
Voice coil diameter               25,8 mm          1 in
Magnetic assembly weight              1 kg       2,2 lb
BL factor                                   5,9 N/A
Moving mass                                0,021 kg
Voice coil length                           14 mm
Air gap height                                6 mm
X damage  (peak to peak)                    21 mm
MOUNTING INFORMATION
THIELE-SMALL PARAMETERS**                                Overall diameter                 206 mm      8,11 in
Bolt circle diameter            196,2 mm      7,72 in
Resonant frequency, f s                       52 Hz          Baffle cutout diameter:
D.C. Voice coil resistance, R e               5,5 ?           - Front mount                   183 mm        7,2 in
Mechanical Quality Factor, Q ms                5,56           - Rear mount                    194 mm      7,64 in
Electrical Quality Factor, Q es                1,10          Depth                             86 mm      3,39 in
Total Quality Factor, Q ts                     0,92          Volume displaced by driver          1,5 l      0,07 ft 3
Equivalent Air Volume to C ms , V as          29,6 l         Net weight                        1,17 kg      2,58 lb
Mechanical Compliance, C ms              438 mm / N          Shipping weight                   1,33 kg      2,93 lb
Mechanical Resistance, R ms               1,26 kg / s
Efficiency, ?                                0,36 %          Notes:
Effective Surface Area, S d                0,022 m 2         *  The  power  capaticty  is  determined  according  to AES2-1984  (r2003)  standard.  Program
Maximum Displacement, X  max  ***           5,7 mm           power is defined as the transducer’s ability to handle normal music program material.
Displacement Volume, V d                    110 cm 3         ** 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
Voice Coil Inductance, L @ 1 kHz            0,8 mH           long term parameters (once the loudspeaker has been working for a short period of time).
e
*** 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.

BF-8R
LOW FREQUENCY TRANSDUCER
www.beyma.com
LOW & MID FREQUENCY TRANSDUCER
FREE AIR IMPEDANCE CURVE
[
[Hz]
FREQUENCY RESPONSE AND DISTORTION
[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 ?         11/11