Although it marks the entry point into the Line 400, the compact dimensions of the BS 403 belie its exceptional performance capabilities. In small to medium-sized rooms, this 2-way, bass-reflex design delivers extraordinary sound that will leave even the most critical listeners enthralled.
The 400 line is a striking illustration of how design and function can be seamlessly combined. Decorative aluminium elements transform the technical components of the loudspeakers into visual highlights and the crossbar support system fitted to the floor-standing models provides an elegant—and extremely stable—foundation.
The most striking acoustic innovation is the JET 5 tweeter. Outwardly recognizable by its modified appearance, it converts electrical signals with even greater precision—virtually free of inertia. By combining it with a new simplified crossover, ELAC engineers have managed to further improve the high-frequency resolution of its predecessor.
The use of newly developed loudspeaker chassis enables performance in the low and mid-frequency range to match that of the JET 5 tweeter. Ensuring excellent signal fidelity at all volume settings and an even deeper bass response were at the very top of our list of priorities. The Line 400 speakers leave no doubt that a new sonic benchmark has been set for loudspeakers in their class.
Crystal membrane midrange and bass drivers
The eye-catching surface of the crystal membrane is more than just an attractive design feature. Woofers and midrange drivers in the Line 400 employ the Crystal Membrane (patent pending) and their design is based on ELAC’s Aluminium-Sandwich AS Technology. The crystal-shaped inverse aluminium dome is joined to the paper cone in a special gluing process to result in the desired sandwich construction. Resembling the surface of a large crystal, the aluminium-foil stamping stiffens the aluminium dome, diminishing resonances and minimizing coloration, while improving power handling and dynamics. The voice coil design of the midrange and bass drivers results in an expanded range of the respective drivers by nearly an octave.
JET 5 tweeter
Delivering true high-definition sound, ELAC’s JET 5 tweeter enthrals with its lightning-fast response and wide dynamic range, offering minimal distortion, lots of headroom and a distinctly wider frequency range than conventional dome tweeters. The ELAC JET tweeter is one of the most legendary tweeters in the industry and has won international praise with its transparent and effortless sound image.
The JET tweeter was developed to perfection on the basis of the famous Air Motion Transformer by loudspeaker pioneer Dr. Oskar Heil. Its operating principle is based on a concertinaed-foil membrane, driven by a strong magnet system of neodymium rods. This motor drives the air considerably faster than the pistonic motion of a conventional driver, with gains in higher sensitivity and extraordinary dynamics. Due to many additional design changes, like an improved new neodymium magnet system, even higher efficiency, higher sound pressure levels and frequency response up to 50 kHz was achieved.
The core of the JET tweeter is the folded foil membrane. With a fold width of only 0.84 mm, a major requirement in the JET production is precision. To guarantee repeated accuracy and unchanging quality even with high production capacity, gluing and handling are now executed by two SCARA robots. The folding and fixing of the membrane, however, are executed by hand, since for production steps requiring extreme precision, the manual dexterity of skilled technicians is irreplaceable. Due to continuous improvement, the JET 5 tweeter creates an effortless, airy and resonance-free image up to 50,000 Hz, and with its linear frequency response is ideally suited for the reproduction of DVD-A and SACD.
Speaker type: 2-way, bass reflex
Tweeter: 1 x JET 5
Woofer: 1 x 150 mm AS -XR cone
Crossover frequency: 2,500 Hz
Frequency response: 41 to 50,000 Hz
Sensitivity: 86 dB at 2.83 v/1m
Recommended amplifier power: 40 to 200 wpc
Nominal/peak power handling: 70 / 100 wpc
Nominal impedance: 4 Ω; minimum 3.2 Ω @ 260 Hz
Binding posts: 5-way metal
Magnetic shielding: No
Cabinet finishes: High gloss black, white or walnut veneer; oiled walnut
Accessories included: Magnetic fabric grille
Height: 12.1 in / 308 mm
Width: 6.5 in / 166 mm
Depth: 10.9 in / 277 mm
Net weight (each): 16.1 lb / 7.3 kg