Innovation - Inner conception

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. Koupled chambers

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Crédit photo: .Kartesian company

Increase the tweeter sensitivity in the midrange by 3dB and reduce the distortion

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Tweeters are sealed speakers, so the roll off depends on the size of the rear chamber. Many brands have developed tweeters with rear chambers to decrease Fs[Hz] and allow lower crossover point, which is really interesting. We have deeply analyzed how the rear chamber works, and how it affects the acoustic performances, especially the distortion. Our .Koupled chambers solution uses inner resonator, which makes the tweeter working as a speaker in a vented enclosure in low frequency. This innovation increase the tweeter sensitivity in the midrange and limit the dome excursion. As a consequence, the distortion is significantly reduced in this sacred band, where the human ear is very sensitive. The measurement below compare our Twt28_vMS with and without Koupled chamber. The measurement has been done at the maximal power handling. - Red : Koupled chambers - Green : No coupled chambers





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. Kiet air flow

Crédit photo: .Kartesian company
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Ensure soft part venting without any air flow noise

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- Manage the air flow in the speaker is important to cool down the voice coil, and avoid any inner resonation.
- Nevertheless, for the speakers with high cone excursion, keep the air flow quiet in any situation is challenging; noises happen in the air flow with air speed variation.
- We have developed special items, strategically located to manage the air flow and keep its speed constant.
- As a result, our speakers keep quiet working, without any air flow noise, even during the highest cone excursion.





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Crédit photo: .Kartesian company

. Kooling

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Improve heat dissipation for higher power handling

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Cool down the voice coil is necessary for high power handling speakers, such as professional application, or demanding subwoofer. The well known solution (high temperature material for the former, bigger wire section, ...) limit the performances because it increases the weight of the moving mass. We have developed different approach using specific speaker parts as cooling radiator. Instead of using robust but heavy material to support high temperature, we transfer it to the environment. The heat doesn't affect the loudspeaker basically because it is dissipated. Here below, we measure how the temperature increase on our very compact Subwoofer "Sub120_vHE" when we use the Kooling device. We see than Kooling system allows to keep the voice coil 40°K lower than same product without Kooling system. Note: This demanding measurement uses high power signal around the Fs[Hz] during 500s.