User manual | 12LW30 - Beyma

12LW30
12LW30
L W 3 0
S e r i e s
KEY FEATURES
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Ultra light loudspeaker (3.1 kg. 6.84 lb.)
Corrugated cone with high stiffness
3” edgewound aluminium voice coil with kapton
former
Highly vented magnetic structure
Designed for extremely compact woofer
systems
GENERAL DESCRIPTION
This 12” loudspeaker has been designed to achieve a very light loudspeaker with superior technical specifications. Thus, the
magnetic system incorporates a high energy neodymium magnet of reduced dimensions. Moreover, the heat dissipation has
been improved with the use of extra-cooling due to a vented air gap and the aluminium basket. It incorporates a 3” voice coil that
uses high quality materials: edgewound wire with high temperature bonding strength and kapton former. Finally, the corrugated
cone, which has a high stiffness, provides an extremely extended and linear low frequency response, with reduced coloring and
good efficiency.
This transducer is highly recommended for those woofer applications that require a light and small loudspeaker with high
demanding technical specifications.
FREQUENCY RESPONSE AND DISTORTION CURVES
Note: on axis frequency response measured with loudspeaker standing
on infinite baffle in anechoic chamber, 1w @ 1m.
PREDICTED LOW FREQUENCY RESPONSE
Note: Bass-reflex cabinet, Vb=50 l, fb=53 Hz
FREE AIR IMPEDANCE CURVE
12LW30
12LW30
L W 3 0
TECHNICAL SPECIFICATIONS
Nominal diameter
Rated impedance
Minimum impedance
Power capacity
Program power
Sensitivity
Frequency range
Recom. enclosure vol.
Voice coil diameter
Magnetic assembly weight
BL factor
Moving mass
Voice coil length
Air gap height
X damage (peak to peak)
DIMENSION DRAWINGS
300 mm. 12 in.
8 ohms
6.6 ohms
350 w AES
700 w
97 dB 2.83v @ 1m @ 2π
25 - 1200 Hz
20 / 70 l 0.7 / 2.5 ft.3
77 mm. 3 in.
2.4 kg. 5.3 lb.
14 N / A
0.048 kg.
19 mm
9 mm
28 mm
MATERIALS
MOUNTING INFORMATION
Overall diameter
Bolt circle diameter
Baffle cutout diameter:
- Front mount
- Rear mount
Depth
Volume displaced by driver
Net weight
Shipping weight
312 mm. 12.28 in.
294.5 mm. 11.59 in.
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277.5 mm. 10.93 in.
281 mm. 11.06 in.
130 mm. 5.12 in.
3 l 0.11 ft.3
3.1 kg. 6.84 lb.
3.8 kg. 8.38 lb.
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THIELE-SMALL PARAMETERS
Resonant frequency, fs
D.C. Voice coil resistance, Re
Mechanical Quality Factor, Qms
Electrical Quality Factor, Qes
Total Quality Factor, Qts
Equivalent Air Volume to Cms, Vas
Mechanical Compliance, Cms
Mechanical Resistance, Rms
Efficiency, ηo (%)
Effective Surface Area, Sd (m2)
Maximum Displacement, Xmax
Displacement Volume, Vd
Voice Coil Inductance, Le @ 1 kHz
S e r i e s
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51 Hz
6 ohms.
9.96
0.46
0.43
96 l
201 µm / N
1.6 kg / s
2.5
0.0585 m2
5 mm
290 cm3
0.6 mH
Voice coil: edgewound aluminium wire with high
temperature bonding strength. Kapton former able to
withstand high temperatures.
Cone: corrugated paper cone with high stiffness.
Surround: treated cloth to assure good retaining of
elasticity in despite of continuing use.
Spider: cotton spider.
Metal parts: anti-corrosion coated to resist
aggressive environmental conditions.
Basket: specially designed die cast aluminium basket to avoid disturbing resonances.
Magnet: high energy neodymium magnet.
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).
acústica beyma,s.a.
Polígono 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: [email protected] ·

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