Innovation - Motor Structure

. Konstant Bl(X)

Crédit photo: .Kartesian company

.Konstant Bl(X) provides constant force factor at +/-5% over the full linear excursion

Read more about .foKus field


- Magnetic field is a topic more complicated than using oversized magnet, or exotic vintage grade.
- Provide intense magnetic field to the voice coil doesn't means nothing, and can lead up to up-cost without any performance improvement.
- For each of our speaker, we develop the motor structure with accurate dynamic simulation, and prove it out their relevance through measurements





Crédit photo: .Kartesian company

. Konstant Le(X)

.Konstant Le(X) provides constant inductance at +/-5% over the full linear excursion

Read more about .Konstant Le(X)


Inductance variation according to the frequency and the cone excursion creates distortion. The engineering target is to keep the inductance constant on both criteria: - Constant when frequency increase - Constant when cone excursion increase Keep the inductance constant when frequency increase is already achieved on some good loudspeakers using demodulation rings, or low inductance voice coil. Keep the inductance constant around the rest position, when the cone excursion increase is another challenge hat we solve thanks to Konstant Le(X) technology. The curves below show the variation of the inductance around the rest position. - On the left: High end 3" mid-woofer using regular cooper ring - On the right: 3" mid-woofer using Le(X) technology Konstant Le(X) is based on Aluminum and cooper rings, strategically positioned, but also the geometry of the pole pieces has been carefully engineered. The inductance is linear in any circumstances.





. foKus field

Crédit photo: .Kartesian company

.foKus field increase the magnetic field by 20% on the voice coil

Read more about .foKus field


- Magnetic field is a topic more complicated than using oversized magnet, or exotic vintage grade.
- Provide intense magnetic field to the voice coil doesn't means nothing, and can lead up to up-cost without any performance improvement.
- For each of our speaker, we develop the motor structure with accurate dynamic simulation, and prove it out their relevance through measurements





Kartesian - SARL - Capital social : 2000€ (en cours d'augmentation)