. Coaxial


Crédit photo: .Kartesian company

Coaxial speaker with advanced features, able to cover the audio band from 70Hz to 22000Hz in a compact vented enclosure of 4L.


It provides accurate and smooth sounding, suitable for high quality multimedia products, or compact studio monitoring system.

T&S parameters


Fs | 60Hz

SPL | 89dB /2,8V /1m

Re | 5.2Ω

Qms | 3.79%

Qts | 0.203%

Bl | 7.4N/A

VAS | 4.46

Mms | 6g

Sd | 51.8cm²

Frequency responses

On IEC baffle

Distance: 1m

Signal input: 2,83V

On speaker axe

Dash curves: 40°


Low frequency simulated:

4L vented enclosure

Tuning frequency: 70Hz

Blue: Woofer

Yellow: Tweeter

Smoothing: 1/12 Octave


Impedance measured in free air

Mechanical drawing

Unit: [mm]

Crédit photo: .Kartesian company

Advanced design


Treated paper cone

NBR surround

25mm Cu voice coil

Aluminum former

Demodulated by cooper ring

Optimized pole pieces

Innovative DynamiK spider profile

Aluminum frame with vented spider


Damped silk dome

14mm CCAW voice coil

Vented Polyimide former

Innovative Koupled chambers

Low viscosity ferrofluid

Dual magnets motor structure

High grade (N52H) NdFeB magnets

To be noted

A 2nd order passive crossover located at 2100Hz provides the frequency response shown on this graph.

Blue: Woofer

Yellow: Tweeter

Black: Both with crossover

Dashed: Both with crossover at 45°

The result is a smooth frequency response from 100Hz to 22000Hz at +/-3dB.

The enclosure is very compact: 3L, vented, tuning frequency: 70Hz.

This is our .Koncept named .Kalchas.

Note: We improve continually our products, as a consequence, so technical information shouldn't be updated. Non contractual data.