Профессиональный коаксиальный динамик BEYMA 8XC20. Инструкция на английском языке

8XC20
8XC20
C o a x i a l
KEY FEATURES
•      8” bass loudspeaker and 1” exit compression driver
combination
•     High power handling: 170 w AES (L.F. unit) and 40 w
AES (H.F. unit)
•      Extended and linear frequency response (65-20000 Hz)
•     High sensitivity: 95 dB (L.F. unit) and 105 dB (H.F. unit)
•      Low weight (neodymium compression driver)
•      Bass loudspeaker designed for compact bass-reflex
cabinets
GENERAL DESCRIPTION
This 8” coaxial loudspeaker has been designed in order to achieve an excellent compromise between power handling, efficiency
and weight. Its low frequency unit features a 2” (51.7 mm) aluminium voice coil which handles 170 w AES, while the high
frequency unit features a 1.75” (44.4 mm) edgewound aluminium ribbon voice coil which yields a 40 w AES power handling.
The combination of these two drivers give as a result an extended and linear frequency response with low distortion and high
efficiency. Moreover, this dual loudspeaker has a relatively low weight (3.7 kg.) that makes easier to fit it with a compact
bass-reflex enclosure.
FREQUENCY RESPONSE AND DISTORTION CURVES                        FREQUENCY RESPONSE OUT OF AXIS
Note: on axis filtered frequency response measured with loudspeaker
standing on infinite baffle in anechoic chamber, 1w @ 1m.
PREDICTED LOW FREQUENCY RESPONSE                         FREQUENCY RESPONSE OF LF & HF UNITS
Note: bass-reflex cabinet, Vb=20 l, fb=62 Hz
Note: on axis frequency response of low and high frequency units,
1w @ 1m.

8XC20
8XC20
C o a x i a l
TECHNICAL SPECIFICATIONS                                      DIMENSION DRAWINGS
L.F. UNIT
Nominal diameter                      200 mm. 8 in.
Rated impedance                            8 ohms.
Minimum impedance                          7 ohms.
Power capacity*                          170 w AES
Program Power                                340 w
Sensitivity                 95 dB 2.83v @ 1m @ 2p
Frequency range                         65-7000 Hz
Recom. enclosure vol.        10 / 30 l 0.35 / 1.06 ft.3
Voice coil diameter                  51.7 mm. 2 in.
Magnetic assembly weight             3.4 kg. 7.48 lb.
BL factor                                  11.3 N/A
Moving mass                               0.018 kg.
Voice coil length                           17 mm.
Air gap height                               7 mm.
X damage                                    24 mm.              MATERIALS
H.F. UNIT                                                     L.F. UNIT
Rated impedance                           16 ohms.            • Basket: Die cast aluminium
Minimum impedance              10.9 ohms.@ 4.5 kHz            • Cone: Paper
Power capacity              40 w AES above 1.5 kHz
Frequency range                         0.7 - 20 kHz          • Surround: Plasticised cloth
Sensitivity 1w @ 1m                         105 dB            • Voice coil: Aluminium
Voice coil diameter               44.4 mm. 1.75 in.           •  Magnet: Ferrite
Flux density                                  1.8 T
BL factor                                  10.5 N/A           H.F. UNIT
Dispersion                              90° conical           • Diaphragm: Polyester
• Voice coil: Edgewound aluminium ribbon
•  Voice coil former: Kapton
THIELE-SMALL PARAMETERS                                     • Magnet: Neodymium
Resonant frequency, fs                        75 Hz           MOUNTING INFORMATION
D.C. Voice coil resistance, Re            6.3 ohms.
Mechanical Quality Factor, Qms                  7.4         Overall diameter                  212 mm.    8.35 in.
Electrical Quality Factor, Qes                 0.42         Bolt circle diameter              198 mm.    7.79 in.
Total Quality Factor, Qts                      0.40         Baffle cutout diameter:
Equivalent Air Volume to Cms, Vas               17 l        - Front mount                     181 mm.    7.12 in.
Mechanical Compliance, Cms               250 mm mm mm / N   - Rear mount                      181 mm.    7.12 in.
Mechanical Resistance, Rms                 1.1 kg / s       Depth                             131 mm.    5.16 in.
Efficiency, hh hh ho (%)                        1.7         Volume displaced by driver           1.5 l     0.056 ft. 3
2
Effective Surface Area, Sd (m )           0.0220 m 2        Net weight                           3.7 kg.   8.14 lb.
Maximum Displacement, Xmax                    5 mm          Shipping weight                      4.2 kg.   9.24 lb.
Displacement Volume, Vd                     111 cm 3
Voice Coil Inductance, Le @ 1 kHz            1.2 mH
Notes:
*The power capacity is determined according to AES2-1984 (r2003) standard.  **T-S parameters are measured after an exercise period using a preconditioning power test.
Program power is defined as the transducer’s ability to handle normal music program material.  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).
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 ·