Six years after the first Beryllium inverted dome tweeter (patented), the one of the Grande Utopia Be, our know-how never stopped improving. In parallel, our other obsession, that started with Electra 1000Be and its IAL technology (Infinite Acoustic Loading), has been to make the tweeter go as low as possible. The combination of the inverted dome and the Poron® surround is decisive.

In that way, this approach is close to the EM woofer: how to go high and go deep down with a very high efficiency? How to make these fundamentally opposed principles coexist?

By reconsidering the tweeter design going back to the fundamentals. We started from the IAL model with the only imperative to go even further in all fields. The principle is based on a tweeter designed like any other driver, the back of the dome and its surround, is totally open, to be loaded by a tuned cavity. Double advantage: keep a very low moving mass and push to the extreme the elasticity to get extended response in the bass and reduce the resonance frequency.

Here is the key point: this frequency must be relegated to the lowest possible frequency, so that it won’t interfere with the sound. Distortion and aggressiveness are the most obvious signs of an insufficiently low resonance frequency.

Going from 1280Hz to the Grande Utopia EM’s 528Hz, the accomplished progress is clear, with a significant safety margin compared to the tweeter bandwidth, from 2.2kHz to 40kHz.

Handing over the midrange – very critical for the ears between 2 and 5kHz – to a tweeter with an ultra-light dome rather than to a midrange cone, it’s a unique experience in terms of precision, definition and spacialisation.