Eighteensound 21LW1400 21inch Lautsprecher Chassis 8 Ohm

Eighteensound 21LW1400 21inch Lautsprecher Chassis 8 Ohm

ES21LW1400

• 99 dB SPL 1W / 1m average sensitivity
• 100 mm (4 in) Interleaved Sandwich Voice coil (ISV)
• 1400W AES power handling
• Carbon fiber reinforced straight-ribbed cone
• 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

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.

Nominal Diameter	533 mm
Nominal Impedance	8 Ohm
Minimum Impedance	6,4 Ohm
Nominal Power Handling1	1400 W
Continuous Power Handling2	1600 W
Sensitivity3	99,0 dB
Frequency Range	24 - 2000 Hz
Voice Coil Diameter	100 mm
Winding Material	copper
Surround Shape	Triple roll
Cone Shape	Straight
Magnet Material	Ferrite
Woofer Cone Treatment	Weather protected
Recommended Enclosure	300,0 dm3
Recommended Tuning	30 Hz
Resonance Frequency	28 Hz
Re	5,0 Ohm
Qes	0,24
Qms	9,32
Qts	0,24
Vas	385,0 dm3
Sd	0,17 cm2
Xmax	9,5 mm
Mms	296,0 g
Bl	33,5 Txm
Le	2,85 mH
EBP	116 Hz
Overall Diameter	545 mm
Bolt Circle Diameter	520 mm
Baffle Cutout Diameter	492,0 mm
Depth	259 mm
Flange and Gasket Thickness	14 mm
Net Weight	17,0 kg
Shipping Weight	19,1 kg
Shipping Box	550 x 550 x 300 mm