. Coaxial


Crédit photo: .Kartesian company

Cox120_vHP is an advanced coaxial loudspeaker, designed to cover 60 - 22 000Hz (-3dB).

The cone of the woofer uses the hexaKone technology and the reversed NBR surround which avoid any diffraction for tweeter sound wave.


The tweeter is built with very light 12mm voice coil dived in twin NdFeB magnets motor, delivering 16000 Gauss.

We suggest a crossover point around 3200Hz, 12dB/Oct.

T&S parameters


Fs : 68Hz

SPL : 88dB /2,8V /1m

Re : 5.3Ω

Qms : 4.2%

Qts : 0.339%

Bl : 5.92N/A

VAS : 3.11L

Mms : 5.7g

Sd : 47.8cm²

Frequency responses

On IEC baffle

Distance: 1m

Signal input: 2,83V

On speaker axe

Dash curves: 40°


Low frequency simulated:

4.5L vented enclosure

Tuning frequency: 60Hz

Blue: Woofer

Yellow: Tweeter

Smoothing: 1/12 Octave


Impedance measured in free air

Mechanical drawing

Unit: [mm]

Crédit photo: .Kartesian company

Advanced design



NBR surround

26mm Cu voice coil

Aluminum former

Demodulated by cooper ring

Optimized pole pieces

Innovative DynamiK spider profile

Aluminum frame with vented spider

10900 Gauss on 5mm height


Damped silk dome

12mm CCAW voice coil

Vented Polyimide former

Innovative Koupled chambers

Low viscosity ferrofluid

Dual magnets motor structure

High grade (N52H) NdFeB magnets

16000 Gauss on 1.2mm height

To be noted

More details coming soon

Crédit photo: .Kartesian company

Modular solution which can be used as satellite speaker of active stereo system is association with .Kalypso_4 subwoofer,

Both solutions could be mixed to create adaptable wireless speaker ecosystem.

.Kalchas alone covers 65 to 25000Hz (-3dB) with very clear and accurate sounding.

Contact us for more information

Loudspeakers used:

Application example

Note: We improve continually our products. No contractual data.

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