Difuzor Extended LF 18''
Tip produs: echipamente audio | echipamente dj | echipamente audio constantaProducator: 18 Sound
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Prezentare Difuzor Extended LF 18''
Features
98 dB SPL 1W / 1m average sensitivity
100 mm (4 in) Interleaved Sandwich Voice coil (ISV)
1000 W AES power handling
Double Silicon Spider (DSS) for improved excursion control and linearity
Weather protected cone and plates for outdoor usage
Improved heat dissipation via unique basket design and backplate vents
Suitable for high SPL subwoofer design
Technologies
DSS - Double Silicon Spider
ISV - Interleaved Sandwich Voice Coil
The 18LW1251 is the updated version of the 18LW1250, an 18 inch (460 mm) high performance extended low frequency transducer. It has been designed for use as a low bass or sub-woofer component, in either a reflex, bandpass or horn loaded configuration, in high power loudspeaker systems. The 18LW1251 design has evolved from extensive research carried out at our own R&D and Engineering facilities. It provides clean, undistorted low frequency reproduction at very high levels and is able to withstand high power without damage. The transducer design features include a large displacement suspension system which in conjunction with a high quality cone and the Eighteen Sound Double Silicon Spider (DSS), assure a very linear piston action and provide full control across the entire working range. This is further improved by a inside outside copper voice coil, based on our Interleaved Sandwich Voice coil (ISV) technology. This provides high levels of thermal stability and durability. The ISV technology is based on a high strength fiberglas former with half the coil wound on the outside and half on the inside, bonded together using unique high temperature resin adhesives. The result is a balanced linear motor exerting a very high force factor. Excellent heat dissipation is derived from a basket design which incorporates air channels between the basket and the magnetic top plate. In addition, eight air vents in the back plate, aligned with the voice coil, force the air into the lower part of the gap. Maximum flux density in the gap is assured by the special top and back plate design, resulting in a high BL factor. Due to the increasing use of audio systems at outdoor events, the ability to perform in adverse weather conditions or in areas of high humidity is a key feature of the 18LW1251. This has been achieved using exclusive cone treatment and magnetic plate processes which increase resistance to corrosion and render the cone water repellent.
Date tehnice:
General
Product type : Cone driver
Brand : Eighteen Sound
Manufacturer reference : 18LW1251
Product code : ALT181251WF08FA - 0221881250
Informations
Nominal impedance : 8 ohm
Dimensional category : 18 inch
Frequency coverage type : Sub, Low
Manufacturer sensitivity : 98 dB
Calculated sensitivity : 97.98 dB
Nominal power handling : 1000 W
Max power handling : 1400 W
Bandwidth : 35÷3500 Hz
Fundamental parameters
Sd : 1134 cm²
Mms : 142 gr
Cms : 148 µm/N
Le : 2.73 mH
Re : 5 ohm
BL : 23.6 T.m
Small signal parameters
Fs : 35 Hz
Qes : 0.28
Qms : 8
Qts : 0.27
Vas : 268 L
Datas
Xmax : ±9 mm
EBP : 125 Hz
Zmin : 6.4 ohm
Fs / Qts : 130 Hz
Vas * Qts² : 19.54 L
Calculated efficiency : 3.94 %
Weight : ~13 kg
Dimensions
Voice coil diameter : 4 inch
Outside diameter : 462 mm
Diamètre d\'encastrement (mm) : 416 mm
Depth : 207 mm
Front thickness : 19 mm
Depth after front : 188 mm
Shape & Materials
Front chape : Cylindrical
Magnet type : Ferrite
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