Home-Made IEMs
Sep 8, 2020 at 3:40 PM Post #11,508 of 13,624

jameswalker

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I think there might be more differences than just a cap. Modelling the FK and WBFK together to get the 30017 looks like this (for me based on datasheet info only). The dark blue line is the TWFK, the red line is the FK and the yellow line is the WBFK.

No cap choice even comes close to getting that linear response of the new TWFK from 800hz to 2.5k.

1599593148717.png
 
Sep 8, 2020 at 3:52 PM Post #11,509 of 13,624

Bassiklee

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Yeah, I don't know if it's just a 30017 with an added cap, or if they just used one in the pic. If I were an exec at a BA company, I wouldn't call a 30017 prewired by an entirely different model number. Then again, I wouldn't have a pic of a 30017 in the info sheets for a different model either. I have some coming, but I have no desire to desolder that cap and measure it.
 
Sep 8, 2020 at 4:05 PM Post #11,511 of 13,624

HenacanPodwell

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Sep 8, 2020 at 11:29 PM Post #11,514 of 13,624

Farquarl

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I think there might be more differences than just a cap. Modelling the FK and WBFK together to get the 30017 looks like this (for me based on datasheet info only). The dark blue line is the TWFK, the red line is the FK and the yellow line is the WBFK.

No cap choice even comes close to getting that linear response of the new TWFK from 800hz to 2.5k.

1599593148717.png
It literally says 30017 on the side of the driver. Tbh i don´t see that much of a difference. Caps alter phaseangle so there could be some interference going on here.
 
Sep 9, 2020 at 4:29 AM Post #11,515 of 13,624

Bassiklee

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It will be interesting to see what it says on the actual drivers. Very well could be just a 30017 with a cap and wires, but the graph looks markedly better than the one for the 30017, which is wired using a 0.82uF cap for that measurement.
 

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