Developing the solid – body tweeter

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There has been a vast amount of change in the new 800 Series Diamond, yet the Diamond tweeter dome itself is one of the few elements to remain constant. We look at the other significant developments that have gone on around it in order to improve
its performance.

When developing the new 800 Series Diamond, every single aspect of the outgoing series was measured, reviewed and investigated to see if it could be improved upon. Nothing was out of the scope of this incredibly intensive process, based on both the very latest in Finite Element Analysis and the most inquiring minds in the business. The result of all this work was that almost every element saw some change.

The Diamond Dome tweeter is one of the very few component parts carried over from the previous 800 Series Diamond to the new range. Our engineers discovered that it still offered the best combination of rigidity and lightness, came closer than any other material to the theoretically perfect tweeter and continued to deliver the best possible acoustic performance.

However, this only went for the dome itself. Our research concluded that the rest of the tweeter assembly could be improved upon. The key issue was ‘how’.

New shapes

In the outgoing 800 Series Diamond the tweeter housing was a hollow zinc component. As can be seen in the video below, our investigations concluded that there was definitely room for improvement in the mechanical construction of this tweeter housing. This simulation, created using Finite Element Analysis (FEA), shows the behaviour of energy moving through the structure: the blue elements are not resonating, the red parts are resonating considerably.

Following extensive research into shapes and materials our engineers concluded that the solution to this problem lay in developing an all-new tweeter housing milled from a single billet of aluminium. We call this immensely stiff structure the solid-body-tweeter assembly.

The new design gives us a number of advantages over previous incarnations. Firstly, it has a higher mass, which makes the entire assembly more inert. Its superior stiffness also allows us to control break-up modes more effectively, allowing the highly sensitive tweeter dome to deliver cleaner, more accurate performance.

Improved mechanics

The new solid-body tweeter assembly also acts as a massive heat sink for the tweeter, again providing a performance improvement over the outgoing models. The tweeter diaphragm and its assembly are rigidly coupled into the tweeter body, while a new decoupling design better separates the sensitive tweeter element from the new midrange Turbine head, creating an even greater sense of spaciousness around high frequencies.

Finally, a fixed and yet acoustically benign protective steel grille mesh has been developed to ensure the precious diamond domes are protected from unwanted attention that could lead to costly repairs.

800D3 tweeter body mode1

Improved performance

All of these updates and changes take place around what is already widely regarded as the world’s best tweeter technology so while the Diamond dome itself hasn’t changed, treble performance has improved considerably in the new 800 Series Diamond range. Meaning that the best just got that bit better – again.

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