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Multi-Way Conventional loudspeakers with crossovers |
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#1 |
diyAudio Member
Join Date: Feb 2008
Location: ITALY
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Hello I need an inductor of about 30mH in series to my 8 ohm woofer.
Max speaker power is 45W/90W. Amplifier no more than 40 watt RMS output. Are these inductors ok for a crossover? 195P5 Hammond Manufacturing FIXED IND 30MH 5A 230 MOHM CHASS 195P5 - Hammond Mfg. |
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#2 |
diyAudio Member
Join Date: Mar 2006
Location: Indiana
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Not really the right part, and they have pretty high DCR.
Wolf |
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#3 |
diyAudio Moderator
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I might guess a reactor could produce some distortion. I wouldn't use it unless I had it and could test it first.
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#4 |
diyAudio Member
Join Date: Feb 2008
Location: ITALY
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#5 |
diyAudio Member
Join Date: Feb 2008
Location: ITALY
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#6 |
diyAudio Member
Join Date: Dec 2011
Location: Arnhem, NL
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Seems a laminated steel E-core coil to me. If it's wound properly I think it will do audio just fine. Though I know of one (1) old design with a 30mH series inductor, I'm really curious how you got to this crossover setup...
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#7 |
diyAudio Member
Join Date: Feb 2008
Location: ITALY
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30mH is in series with a woofer.
This cell (woofer+inductor) is in parallel to another identical woofer to enhance 40-100Hz octaves. Both work in two separate vented volumes |
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#8 |
diyAudio Member
Join Date: Nov 2012
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I do not think .23 ohm is that much either
I guess this large coil can have some microphony issues if not constructed well or baked, so it is better to keep it outside the speaker box and far away from the listening position |
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#9 |
diyAudio Member
Join Date: Mar 2003
Location: Zürich
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maybe you know it, but this unit is meant for filtering a DC power supply. For that it needs an airgap. Due to the airgap it needs a much bigger core, Due to bigger core it needs more wire, therefore higher DCR.
You do not need to handle DC current, so you could go for a much smaller core, lighter and lower DCR. I am not saying these smaller cores will be cheaper though ![]() Another thing. The specification of 30mH is with the 5A DC current. Besides tolerances that may change this value, if there is no DC current the actual inductance will probably be higher.
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