c-coil (toroid) in 2.5 way system - diyAudio
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Old 5th November 2013, 10:12 AM   #1
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Default c-coil (toroid) in 2.5 way system


Just wondering if this is fine to use toroid c-coil from jantzen in 2.5 way system for lower bass output? In such system boths midwoofers are connected in parallel. One play mids(<2200hz) and lows and one only lows below 300-400hz. I thought to use c-coil for lower midwoofer. but can anybody tell me if c-coil(toroid) would have negative(audible) effect on "higher" midwoofer?

C-Coil - Jantzen-audio.com
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Old 5th November 2013, 11:13 AM   #2
DUG is offline DUG  Canada
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mH of inductor?


Adding an inductor will not make more bass.
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Old 5th November 2013, 11:46 AM   #3
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4,7 mH
schematic (hi-pass for 27TDFC, lo-pass for U18RNX/P woofers):
Click the image to open in full size.

Last edited by akkilles; 5th November 2013 at 11:55 AM.
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Old 6th November 2013, 07:14 AM   #4
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Since nobody knows I will try with c-coil and check if it is good idea
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Old 6th November 2013, 08:34 AM   #5
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Troels did use such a coil in a project. See here: DTQWT-mkII
But IMHO for a 4.7mH inductor I would stay with a more conventional and cheaper cored coil. One with DCR < 0.3 Ohm would cost less than half the one you are proposing.

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Old 6th November 2013, 09:52 AM   #6
sreten is offline sreten  United Kingdom
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L3 will not affect the bassmid driver. It does not
have to particularly low resistance in any sense.
L2 needs to be beefy to handle both drivers well.

rgds, sreten.
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Old 7th November 2013, 07:54 AM   #7
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I had a pair of 4.7mH C-Coils that measured 2.7mH and 2.9mH, so please measure for best results. I also had a pair of 1.5mH that were just fine.

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