The eye-catching surface of the crystal membrane is more than just an attractive design feature. The midrange/woofers of the Concentro employs the Crystal Membrane (patent pending) and the design is based on ELAC’s Aluminum-Sandwich AS Technology. The crystal-shaped inverse aluminum 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 aluminum-foil stamping stiffens the aluminum dome, diminishing resonances and minimizing coloration, while improving power handling and dynamics.
Delivering true high-definition sound, ELAC’s JET 5 tweeter enthralls 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 neodymium magnet. This motor drives the air considerably faster than that 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 hi-res formats.
The base of the Concentro is a complex design machined from a single piece of aluminum that has a matt, clear-anodized -finish. Weighing more than 55 lbs, the base employs four adjustable, high-definition spikes for maximum stability and ideal coupling to hard or soft floor surfaces.
Tweeter: JET 5, modified
Midrange: 70/140 [mm]AS-XR Ring radiator
Midbass: 220 [mm] AS-XR Cone
Bass reflex tubes: 2 off 120×350 [mm] Cone
Woofer: 4 off 250 AS [mm]
Bass Loading: Vented Box
Crossover Frequencies: 120 / 360 / 2700 [Hz]
Frequency range ( IEC 268-5): 18 – 50 000 [Hz]
Sensitivity: 90 [dB/2.83V/m]
Recommended amplifier power: 80 – 600 [W/Channel]
Suitable for amplifier rated between: 4-8 Ω
Rated power (Continuous): 400 [W]
Rated power (Dynamic): 600 [W]
Rated impedance: 4 Ω
Binding posts: 5-way custom; bi-wirable
Magnetic shielding: No
Weight: 140 [kg]
Dimensions (WxHxD): 460 x 1680 x 610 mm with spikes