Crédit photo: .Kartesian company

Incredible 4inch subwoofer able to  reproduce 48Hz at 98dB(A), 1m in 5L vented enclosure.


The cone excursion is +/-7mm (+/-11mm mechanical max).


Advanced engineering keep linear suspension stiffness, force factor and inductance value on the full excursion.


T&S parameters

Fs : 50Hz

SPL : 81dB /2,8V /1m

Re : 6.9Ω

Qms : 6.27%

Qts : 0,511%

Bl : 6.84N/A

VAS : 3.05L

Mms : 12g

Sd : 50.5cm²

Frequency responses

On IEC baffle

Distance: 1m

Signal input: 2,83V

Dash curves: 30° & 60°

No smoothing

Low frequency simulated:

5L vented enclosure

Tuning frequency: 45Hz

Impedance measured in free air

Mechanical drawing

Unit: mm]


Aluminum cone

Large NBR surround

Carbon fiber dust cap

33mm Cu voice coil (2 layers)

Vented Polyimide former

Optimized pole pieces

Vented U-Yoke

Inductance non-linearity device

Demodulated by 2 Al rings

Innovative t.dynamiK spider

Aluminum frame with vented spider

Advanced design

Dynamik Spider.png
Konstant Le(X).png
Kombo magnets.png
Crédit photo: .Kartesian company

To be noted

More details coming soon

Crédit photo: .Kartesian company

Application example

Loudspeakers used:

Impressive compact subwoofer, suitable for modern living room, where the audio system must be as discrete as possible, but performances remaining at  the highest level.

.Kalypso_4 uses our 4" subwoofer and two passive radiators tuned at 45Hz.

The result with active correction provides outstanding results besides the size.

(High-pass: 30Hz -12dB/Oct,  Low-pass: 100Hz -36dB/Oct, and +3dB at 48Hz - Q2.2)

Contact us for more information

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