Crédit photo: .Kartesian company

4inch  passive radiator with linear cone excursion of +/-7mm (+/-11mm max).


This PR120_vHP use our .dynamiK spider to provide constant suspension stiffness on the full excursion.

We provide separate added mass (8g & 30g), but any other value can be provided on demand.

T&S parameters

Fs | 36Hz


Re | NA

Qms | 6%

Qts | NA

Bl | NA

VAS | 1.85L

Mms | 14.6g

Sd | 50.5cm²

(Without added mass)

Mechanical drawing

Unit: mm]

Aluminum cone

Large NBR surround

Carbon fiber dust cap

DynamiK spider

Added mass : 8g & 30g

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, our 4inch subwoofer (ref. Sub120_vHP) which can be used with two passive radiators (our PR120_vHP) in a very compact enclosure.

The Kalypso is a cube of 200mm which integrates 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.