The woofers of the 120 Series are designed in the ELAC proprietary aluminium sandwich technique. In a special glueing procedure, an aluminium foil of 0.2mm is joint to a pulp fibre cone to form a sandwich membrane.

The result: reduced partial oscillations, no distortions and an optimised large signal behaviour.

Due to the specially wide double asymmetrical ('DAS') rubber surround, ELAC's TT 180 woofer can handle up to ±15mm long stroke. This provides maximum level supply and mellow low bass. For a driver this size, such a large displacement represent a unique engineering achievement.

In combination with the aluminium-coloured tweeters, the aluminium sandwich woofers also make innovative technology a visual experience.