Aluminum Top-Plate
A new aluminum top plate features a series of machined-out holes in the structure, strategically positioned to change the resonant frequency of the aluminum.​

 

New Tweeter Grille Mesh
Both models introduce a new design of tweeter grille mesh. ​The new grille mesh offers ​a carefully optimized combination of stiffness – necessary to protect the fragile dome from unwanted damage – and openness.​

The new design is more open than ever, which enhances both ​resolution and spaciousness. The orientation of the structure is specific and engineered to ensure the best results.​

We had over 25 iterations in the development process of this new design!

New Bass Unit for 801 D4 Signature and New Mid/Bass for 805 D4 Signature
In 801 D4 Signature, 10-inch low-frequency unit has been ​re-engineered to deliver even lower distortion.​

We take the same approach with the mid/bass drive unit on 805 D4 Signature, which also features an upgraded pole on the magnet plus ​a larger vent hole for improved current distortion.

Upgraded Crossovers
Both 801 Signature and 805 Signature feature upgraded bypass capacitors. These are also doubled-up in quantity across the boards. The result is an even cleaner sound.