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• TT150AS-XR: difuzoare bass cu membrane sandwich hartie-aluminiu "Crystal"
• MT140AS-XR: difuzor medii cu membrana sandwich hartie-aluminiu "Crystal"
• Suspensie din material textil impregnat "full-roll" pentru difuzorul de medii
• JET III: tweeter cu tehnologie Air-Motion-Transformer (folded foil)
• DC ring (JET Dispersion Control): inel pentru controlul dispersiei ce se monteaza in jurul tweeterului JET

A dream: FS 248

ELAC has many beautiful daughters. However, the FS 248 had scarcely left the development phase before it acquired a special position. The eye of the beholder is immediately captivated. It is in musical terms in particular, however, that it really shows its mettle. It plays with a freedom and naturalness that is a joy to listen to. The music is set completely free from the loudspeaker. The singers seem move to and from on the virtual opera stage in stately grandeur. It turns music into pure relaxation and delight.

Treble Unit

The ELAC JET tweeter is one of the most legendary tweeters in the hi-fi trade and has won international renown with its unusual transparent and effortless sound image.

The JET tweeter was delveloped to perfection on the basis of the famous 'Air Motion Transformer' by loudpseaker pioneer Dr Oskar Heil. Its principle: a concertinaed foil membrane is driven by a strong magnet system of neodymium rods.

This 'motor' drives the air considerably faster than the conventional pistonic technique. High sensitivity and extraordiary dynamics are the result. Due to continuous improvement, the JET III tweeter creates an effortless and airy resonance-free image up to 50,000 Hz, and with its linear frequency response is ideally suited for the reproduction of Hi-Res Audio music.

The ELAC "JET Dispersion Control DC" is a flat ring made of open-cell rubber foam which is mounted around the JET orifice with four clasps (or with adhesive tape). The JET DC results in a broadband reduction of about 0.5 dB of the radiated sound level nearly independent of frequency. The JET DC is best suited for rooms with little sound absorption at high frequencies, especially for rooms with large windows without curtains or with a smooth floor without a carpet. All loudspeakers of the 240 series are supplied with the JET Dispersion Control as an accessory.

Midrange Unit

MT 140 AS-XR midrange used in FS 248 and FS 249.

The midrange driver of the 240 series contains the new "Crystal Membrane" (patent pending) and their design is based on the well-known "Aluminium-Sandwich AS Technology" which avoids noticeable resonances in the diaphragm.The "Full-Roll" fabric surrounding expands the transmission range up to high frequencies to facilitate the crossover to the tweeter.

Bass Unit

TT 150 AS-XR midbass used in: BS 243, CC 241, FS 247 and FS 248.

All woofers and midrange drivers of the 240 series contain the new "Crystal Membrane" (patent pending) and their design is based on the well-known "Aluminium-Sandwich AS Technology" which was developed by ELAC a couple of years ago. The crystal-shaped inverse aluminium dome is joined to the paper cone in a special glueing process resulting the desired sandwich construction.

The stamping of the aluminium foil looks like the surface of a large crystal, this is where the term "Crystal Membrane" come from. This stamping stiffens the aluminium dome considerably which diminishes the membrane-internal resonances resulting in less sound coloration and additionally improves the large signal behaviour noticeably.

The voice coil is not only - like usually - joined to the neck of the paper cone but also to the bottom of the aluminium dome. This design results in the expansion of the transmission range of the respective woofers or midrange drivers by nearly an octave. Therefore the abbreviation "XR" (eXtended Range) has been introduced.