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Old 13th January 2006, 06:09 PM   #1
Jeb-D. is offline Jeb-D.  United States
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Default Bipole efficiency

What effect does a biplole setup have on efficiency, as opposed to a monopole?
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Old 13th January 2006, 07:22 PM   #2
BWRX is offline BWRX  United States
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It increases it. It has been mentioned in many threads in this forum that the rear firing driver in a bipole effectively gets rid of the baffle diffraction step.
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Old 13th January 2006, 09:10 PM   #3
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How about the difference with bipole drivers wired in parallel and in series?
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Old 13th January 2006, 09:13 PM   #4
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Parallel add 3db. Series stays the same.
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Old 13th January 2006, 09:31 PM   #5
ScottG is offline ScottG  United States
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Quote:
Originally posted by Scottmoose
Parallel add 3db. Series stays the same.

..depending on the output impeadance of the pairing amplifier..
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Old 14th January 2006, 10:32 AM   #6
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True. But you've got to have some approximates in this life... So I'm told anyway. (I never believed it either! )

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Old 14th January 2006, 07:05 PM   #7
Jeb-D. is offline Jeb-D.  United States
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Thanks for the input. Do any of you guys have any good links to designing a bipole? I have 4; W4-1052's and was planning on making a pair of bipoles.
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Old 14th January 2006, 07:22 PM   #8
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Look at Dave's (planet10) two sites: www.t-linespeakers.org and www.planet10-hifi.com

Everything you will ever need, including numerous superb projects -Dave is the Bipole Master as far as I'm concerned.

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Old 22nd January 2006, 11:01 PM   #9
Salas is offline Salas  Greece
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Quote:
Parallel add 3db. Series stays the same.
dBW you mean, bcs in SPL things are different. Here we have corelated sound sources in close proximity. I have measured a +5 dB average up to 1.5 kHz. This means practically full BSC compensation. Good for listening away from walls. Best FR drivers for dipoles are the ones which exibit a naturally rising response.
See manufacturer's curve of single and then its bipole application here
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Old 23rd January 2006, 07:51 AM   #10
Salas is offline Salas  Greece
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*for dipoles = I wanted to type 'bipoles'
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