This 18” low frequency transducer has been speciall y designed to supply incr edibl y high sound pr essur e in the low frequency region, with exceptional
high power capacity and minimum harmonic distortion. This model features a 4”1/2 (114 mm) voice coil, edgewound aluminium ribbon wire, a
moving mass at least half the weight of pure copper, a powerful, vented magnetic circuit, optimum cooling system which provides fast heat exchange,
reduced thermal power compression and double spider assembly. The result is an incredible highly efficient transducer f or subwoofer applications,
the ability to handle high elongation, extremely low distortion and reduced thermal power compression.
Este tranductor de 18” ha sido diseñado para entregar altos niveles de presión acústica con una potencia admisible impresionante. Incorpora una
bobina de 4”1/2 (114 mm.) realizada con hilo de aluminio de masa menor a la mitad de la que tendría en cobr e; Utiliza un potente circuito magnético
con un sistema optimizado de ventilación que proporciona un rápido intercambio del calor generado en la bobina, y una suspensión de doble
centrador para controlar los desplazamientos en grandes elongaciones. Este modelo se caracteriza por un elevado rendimiento, alta potencia
admisible y excelente linealidad de la respuesta en frecuencia.
-Pro-
PREDICTED LOW FREQUENCY RESPONSE • Bass-reflex cabinet, Vb=120,00 I, fb=50,0 Hz
SPECIFICATIONS
460 mm. 18 in.
8 ohms.
700 w RMS
1400 Watts.
98 dB, 2.83v @ 1m @ 2π
25-1500 Hz
80-200 l 2.8-7 ft.3
114 mm. 4.5 in.
11.5 kg. 25.3 lb.
28.8 N/A
0.170 kg.
25 mm.
11 mm.
40 mm.
460 mm. 18.11 in.
438 mm. 17.24 in.
415 mm. 16.34 in.
425 mm. 16.73 in.
210 mm. 8.27 in.
13 l 0.46 ft.3
14 kg. 30.8 lb.
15.65 kg. 34.43 lb.
Die Cast aluminium
Paper
Plasticised cloth
Edgewound alum. flat wire
Ferrite
40 Hz
6.1 ohms.
12.05
0.334
0.325
212 l
93 µm/N
3.54 kg/s
4
0.1320 m2
9 mm.
1180 cm.3
2 mH
NOTES
*The power capacity corresponds to the RMS maximum value that
can dissipate the loudspeaker when a sinus signal is applied for a
period of at least two hours.
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, using a velocity-current laser transducer,
and will reflect the long term parameters, once the loudspeaker has
been working for a short period of time.
NOTAS
*La potencia admisible corresponde a la máxima potencia RMS que
puede disipar el altavoz durante al menos dos horas, cuando se le
aplica una señal senoidal determinada.
Por potencia programa se entiende la capacidad del altavoz en el
manejo de señales transitorias, como sería el proporcionado por el
contenido de un pasaje musical normal.
* *Los parámetros T-S han sido medidos después de un periodo de
fatiga y estabilización de las suspensiones, mediante transductor laser
de velocidad-corriente, y son el reflejo de los parámetros a largo plazo
del altavoz, una vez éste haya sido instalado y haya trabajado en un
corto espacio de tiempo.
Nominal diameter
Rated 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)
Overall diameter
Bolt circle diameter
Baffle cutout diameter:
-Front mount
-Rear mount
Depth
Volume displaced by driver
Net weight
Shipping weight
Basket
Cone
Surround
Voice coil
Magnet
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, o (%)
Effective Surface Area, Sd(m2)
Maximum Displacement, Xmax
Displacement Volume, Vd
Voice Coil Inductance, Le @ 1kHz
MOUNTING INFORMATION
MATERIALS
18G50
LOW
FREQUENCY
FREQUENCY RESPONSE & DISTORTION CURVES, MAGN. On axis, 1w @ 1m.
VOICE COIL INDUCTANCE CURVE
TIME RESPONSE, MAGN.
Re + Red(w) CURVE
FREQUENCY RESPONSE, PHASE. On axis, 1w @ 1m. FREE AIR IMPEDANCE CURVE
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