18 Sound 21LW1400 455,00 EUR

SMALL SPECIFICATIONS

99 dB SPL 1W / 1m average sensitivity

100 mm (4 in) Interleaved Sandwich Voice coil (ISV)

1500W continuous pink noise power handling

Weather protected cone and plates for outdoor usage

Double Silicon Spider (DSS) for improved excursion controland linearity

Double Demodulating Rings (DDR) for lower distortion andimproved heat dissipation

Improved heat dissipation via unique basket design

GENERAL SPECIFICATIONS
Nominal Diameter	533 mm (21 in)
Rated Impedance	8 Ohm
Continuous Pink Noise (1)	1500 W
Continuous Power (2)	800 W
Program Power (3)	1600 W
Peak Power (4)	7000 W
Sensitivity (5)	99 dB
Frequency Range (6)	24 - 2000 Hz
Power Compression @-10dB (7)	(80 W) 0,6 dB
Power Compression @-3dB	(400 W) 1,5 dB
Power Compression @Full Power	(800 W) 2,2 dB
Max Recomm. Frequency	250 Hz
Recomm. Enclosure Volume	120 � 500 lt. (4,24 � 17,7 cuft)
Minimum Impedance	6,4 Ohm at 25�C
Max Peak To Peak Excursion	52 mm (2,05 in)
Voice Coil Diameter	100 mm (4 in)
Voice Coil Winding Material	copper
Polarity	positive voltage on red terminal gives forward cone motion

THIELE SMALL PARAMETERS (8)
Fs	28 Hz
Re	5 Ohm
Sd	0,1662 sq.mt. (257,6 sq.in.)
Qms	9,32
Qes	0,242
Qts	0.235
Vas	385 lt. (13,6 cuft)
Mms	296 gr. (0,65 lb)
BL	33,5 Tm
Linear Mathematical Xmax (9)	� 9,5 mm (� 0,37 in)
Le (1kHz)	2,85 mH
Ref. Efficiency 1W@1m (half space)	98,0 dB

MOUNTING INFORMATIONS
Overall diameter	545 mm (21,46 in)
N. of mounting holes	8
Mounting holes diameter	10 mm (0,39 in)
Bolt circle diameter	520 mm (20,47 in
Front mount baffle cutout �	492 mm (19,37 in)
Rear mount baffle cutout �	490 mm (19,29 in)
Total depth	256,3 mm (10,1 in)
Flange and gasket thickness	14 mm (0,55 in)
Net weight	19,2 kg (42,38 lb)
Shipping weight	20,6 kg (45,47 lb)
CardBoard Packaging dimensions	550 x 550 x 300 mm (21,65 x 21,65 x 11,8 in)

The 21LW1400 is an extended low frequency loudspeaker that sets a new industry standard in 21" (530 mm) high performance transducers. It can be used as a low bass or sub-woofer component, in either a reflex, band-pass or horn-loaded configuration, in high power auditorium or arena loudspeaker systems.
The design evolved from an extensive R&D program carried out at Eighteen Sound. 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 Eighteen Sound Double Silicon Spider (DSS), produce an ultra-linear piston action, providing full control across the entire working range.
The state-of-the-art voice coil, based on our Interleaved Sandwich Voice-coil (ISV) technology, provides 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.
Maximum flux density in the gap is assured by the special top and back plate design, which together result in a high BL factor.
Due to the increasing use of high power audio systems at outdoor events, the 21LW1400 has been adapted 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.

B&C 21SW150 Chassis 780,00 EUR

3000 W continuous program power capacity

150 mm (6 in) copper voice coil

30 � 1000 Hz response

95 dB sensitivity

Ventilated voice coil and aluminium demodulating ring

60 mm peak-to-peak excursion before damage

Double silicone spider with optimized compliance

Specifications

Nominal Diameter 530 mm (21 in)

Nominal Impedance 4 ohm

Minimum Impedance 4 ohm

Nominal Power Handling 1500 W

Continuous Power Handling 3000 W

Sensitivity (1W/1m) 95 dB

Frequency Range 30 - 1000 Hz

Voice Coil Diameter 150 mm (6 in)

Winding Material Copper

Former Material Glass Fibre

Winding Depth 30 mm (1.18 in)

Magnetic Gap Depth 12 mm (0.5 in)

Flux Density 1.2 T

Parameters

Fs 29 Hz

Re 3.3 ohm

Qes 0.27

Qms 8.1

Qts 0.26

Vas 254 dm3 (8.90 ft3)

Sd 1680 cm2 (260.40 in2)

η0 2 %

Xmax 15 mm

Xvar 16 mm

Mms 494 g

Bl 32.6 Txm

Le 1.3 mH

Mounting and Shipping info

Overall Diameter 547 mm (21.5 in)

Bolt Circle Diameter 527 mm (20.7 in)

Baffle Cutout Diameter 508 mm (20 in)

Depth 250 mm (8.2 in)

Flange and Gasket Thickness 15.5 mm (0.62 in)

Net Weight 18 kg (40 lb)

Shipping Weight 20.4 kg (44.9 lb)

Shipping Box 590x590x300 mm (23.2x23.2x11.8 in)

Design

Surround Shape Triple Roll

Cone Shape Radial

Magnet Type Neodymium Ring

Spider Double Silicone

Pole Design T-Pole

Waterproof TWP

Ventilation V.C. Gap Yes

Demodulating Ring Yes

HN-Sound /PA-Chassis/Lautsprecher 21"Artikel

18 Sound 21LW1400 455,00 EUR

B&C 21SW150 Chassis 780,00 EUR