18 -sound 21LW1400 / 8ohm Extended low driver

Beschrijving

Key features

• • 99 dB SPL 1W / 1m average sensitivity
  • 100 mm (4 in) Interleaved Sandwich Voice coil (ISV)
  • 1400W AES power handling
  • Double Silicon Spider (DSS) for improved excursion control and linearity
  • Double Demodulating Rings (DDR) for lower distortion
  • Improved heat dissipation via unique basket design
  • Weather protected cone and plates for outdoor usage
  • Suitable for ultra low frequency systems

Description

The 21LW1400 is a 21 inch high performance extended low frequency
loudspeaker. The transducer can be used as a subwoofer component, in
either a reflex, band-pass or horn-loaded configuration, in high power
auditorium or arena loudspeaker systems. It provides clean and
undistorted LF reproduction at very high SPL and enables the speaker to
withstand high power levels without damage.
The
21LW1400 design features include an exceptional displacement suspension
system which, in conjunction with a carbon fiber reinforced
straight-ribbed cone and the Double Silicon Spider (DSS), produces an
ultra-linear piston action, providing full control across the entire
working range.
The 100mm inside outside copper voice coil, based on
our Interleaved Sandwich Voice-coil (ISV) technology, reaches high
levels of thermal stability and durability. ISV technology is based on
a high strength fiberglas former with half the coil wound on the
outside and half on the inside and bonded together using unique high
temperature resin adhesives. This results in a balanced linear motor
unit which can exert an exceptionally high force factor.
The low
distortion and unmatched sound quality of the 21LW1400 has been
significantly improved by the Double Demodulating Rings (DDR) embedded
in the pole piece of the magnetic structure. These have been designed
to dramatically reduce the intermodulation and harmonic distortion
while improving transient response at the same time.
Excellent heat
dissipation has been achieved using the special basket design which
incorporates air channels between the basket and the magnetic top
plate. In addition, 8 air vents incorporated into the back plate are
aligned with the voice coil to force air into the lower part of the gap.
21LW1400
is ready to perform properly under inclement weather conditions. This
has been achieved using of an exclusive treatment which improves pulp
strength and gives water repellent properties to both sides of the
cone. Moreover, a special treatment is applied to the top and back
plate of the magnetic structure which is far more resistant to the
corrosive effects of salts and oxidization than any other treatment in
use.