Профессиональный сабвуферный динамик BEYMA SM-212. Инструкция на английском языке

SM212
SM212
S M   S e r i e s
KEY FEATURES
•   High power handling (350 w AES)
•   Excellent sensitivity: 98 dB
•   2.5” (62.4 mm.) copper voice coil with polyimide
fiber glass former
•   Optimum winding length for increased linear
excursion
•   Lightweight curvilinear cone
•   Designed for low-mid frequencies reproduction
GENERAL DESCRIPTION
This 12” loudspeaker has been designed to reproduce the low and mid frequency range. It features a 2.5” (62.4 mm) voice coil
made with high quality materials: copper round wire with high temperature bonding strength and fiber glass former. Combining
this with a massive magnet system with an appropriate rear air ventilation results in a excellent power handling: 350 w AES.
Moreover, it incorporates a lightweight curvilinear cone that allows the driver to be used in the low-mid frequency range.
The SM-212 offers a compromise between good efficiency, extended frequency response and reduced harmonic distortion.
It is recommended for small two or three way systems.
FREQUENCY RESPONSE AND DISTORTION CURVES                            FREE AIR IMPEDANCE CURVE
Note: on axis frequency response measured with loudspeaker standing
on infinite baffle in anechoic chamber, 1w @ 1m.
PREDICTED LOW FREQUENCY RESPONSE                              POWER COMPRESSION LOSSES
6.0
5.0
4.0
dB  3.0
2.0
1.0
50   100   150  200   250  300  350
Power (W)
Note: Bass-reflex cabinet, Vb=70 l, fb=40 Hz
Note: These losses are calculated from a five minutes AES power test
applying band limited pink noise (25-1200 Hz). The loudspeaker is free-air
standing.
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SM212
SM212
S M   S e r i e s
TECHNICAL SPECIFICATIONS                                      DIMENSION DRAWINGS
Nominal diameter                      300 mm. 12 in.
Rated impedance                             8 ohms.
Minimum impedance                         6.8 ohms.
Power capacity *                         350 w AES
Program power                                 700 w
Sensitivity                  98 dB  2.83v @ 1m @ 2p
Frequency range                         45 - 6000 Hz
Recom. enclosure vol.         30 / 100 l  1.06 / 3.53 ft. 3
Voice coil diameter                  62.4 mm. 2.5 in.
Magnetic assembly weight              3.8 kg. 8.38 lb.
BL factor                                 12.8 N / A
Moving mass                                0.044 kg.
Voice coil length                           20 mm.
Air gap height                               7 mm.
X damage (peak to peak)                     27 mm.
MATERIALS
MOUNTING INFORMATION
•   Voice coil: copper round wire with high temperature
Overall diameter                  312 mm.    12.3 in.             bonding strength. Polyimide fiber glass former able
Bolt circle diameter             294.5 mm.    11.6 in.            to withstand high temperatures.
Baffle cutout diameter:                                       •   Cone: lightweight paper cone.
- Front mount                    277.5 mm.    10.9 in.        •   Surround: specially treated cloth surround.
- Rear mount                      280 mm.       11 in.        •   Spider: cotton spider.
Depth                             132 mm.    5.20 in.         •   Metal parts: effective protection against corrosion.
Volume displaced by driver              4 l    0.14 ft. 3     •   Basket: specially designed die cast aluminium bas-
Net weight                          4.6 kg.  10.14 lb.            ket to avoid disturbing resonances.
Shipping weight                     5.3 kg.  11.69 lb.
•   Magnet: high Curie temperature ferrite.
THIELE-SMALL PARAMETERS **
Resonant frequency, fs                        40 Hz           Notes:
D.C. Voice coil resistance, Re            5.8 ohms.           *The power capacity is determined according to AES2-1984 (r2003) standard.
Mechanical Quality Factor, Qms                  5.6           Program power is defined as the transducer’s ability to handle normal music program material.
Electrical Quality Factor, Qes                  0.4           **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
Total Quality Factor, Qts                      0.38           term parameters (once the loudspeaker has been working for a short period of time).
Equivalent Air Volume to Cms, Vas              150 l
Mechanical Compliance, Cms               350 mm mm mm / N
Mechanical Resistance, Rms                 1.8 kg / s
Efficiency, hh hh ho (%)                        2.3
Effective Surface Area, Sd (m )           0.0550 m 2
2
Maximum Displacement, Xmax                   7 mm.
Displacement Volume, Vd                     382 cm 3
Voice Coil Inductance, Le @ 1 kHz            1.2 mH
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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