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

Crédit photo: .Kartesian company
Crédit photo: .Kartesian company

To be noted

As you can discover in our .Koncept page, this 4inch subwoofer can be used with two passive radiators (our PR120_vHP) in a very compact enclosure.

The Kalypso is a cube of 200mm which integrate the power amplifier, the subwoofer and both passe radiators.

Useful volume is 3.2L, and it reproduces 40Hz at -3dB when nominal sound pressure is 93dB(A) at 1m.


The response of this graph use high-pass filter at 32Hz (24dB/Oct.), a low-pass filter at 130Hz (24dB/Oct.), and a static gain of +4dB at 48Hz (Q=2%).

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