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Old 18th July 2009, 05:24 PM   #1
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Default L pad placement....

Hello gang!

Any suggestions as to the minimal distance (length of jumper wire) one can successfuly use between an L Pad and a Zobel network on the crossover board????
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Old 20th July 2009, 02:44 PM   #2
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Hi Bill,
'minimal' distance kinda threw me? at audio frequencies, metres should be ok, as long as there's no induced mains hum.

I'm not entirely sure I understand your question but, it is possible for testing purposes to 'LPpad-down' a driver while walking around your listening room. Lyn Olson described his method in his ME(2) designs, from memory. I lost the link so maybe google it or ask him?

When the best setting is found, you simply measure the Lpad's Rs and Rp then solder in the appropriate series and parallel resistors. Amp -> xo -> lpad -> zobel -> driver ( I think the Zobel has to be physically across the driver terminals). my 1/2 cents worth, experts please chime in,
and correct me if I'm wrong please. Grant
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Old 20th July 2009, 03:16 PM   #3
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I don't fully understand your question but as far as I know there isn't a 'minimal' distance between an L-pad and Zobel network.
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Old 21st July 2009, 09:20 AM   #4
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>>>( I think the Zobel has to be physically across the driver terminals).<<<

No, not necessary.



http://www.diyaudioandvideo.com/Calc...qual/Help.aspx
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Old 22nd July 2009, 04:26 AM   #5
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Default Clarification

By distance (linear inches, Cm, mm, ect..) I mean the minimal length (on the crossover board) of jumper wire between the Zobel circuit and the L-Pad circuit before the circuits begin to interfere (if at all) with each other.

Thanks, Bill.
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Old 22nd July 2009, 12:27 PM   #6
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There shouldn't be any interference between an L-pad and Zobel as they're non inductive, so they can be as close together as you like.
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Old 22nd July 2009, 04:21 PM   #7
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Default Thank you.....

Quote:
Originally posted by activexp
There shouldn't be any interference between an L-pad and Zobel as they're non inductive, so they can be as close together as you like.
Thanks activexp!
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