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Old 3rd March 2011, 08:55 PM   #1
rafaro is offline rafaro  Guatemala
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Default push pull in MR horn?

Benefits of PP are known in subs but anything known about their use in Midrange horns. Presume two 6 to 10 inch drivers close together firing into a MR horn 80 Hx and up in freq
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Old 3rd March 2011, 09:12 PM   #2
tinitus is offline tinitus  Europe
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in midrange ? you will notice phase issues form the two voice coils

sound from the back mounted driver easily reflects through front driver diaphragm
phase issues
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Old 3rd March 2011, 09:51 PM   #3
Thawach is offline Thawach  Thailand
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PP mr horn will has but waiting i build! lol if change this to BLH it's possible to be.
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Old 4th March 2011, 01:38 AM   #4
tinitus is offline tinitus  Europe
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ah, I thought you meant isobaric pp, playing midrange
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Old 4th March 2011, 03:51 PM   #5
Thawach is offline Thawach  Thailand
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wow! my old friend come here. tinitus when talk about the horn design, i often remember or imagine only has low freq. if push pull drivers install FLH i never think to get anything better from them.
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Old 5th March 2011, 01:39 AM   #6
djk is offline djk
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How high is 'and up'?

You could do it with the plenum (as per my PPSL) up to 800hz or so without much problem, or use a sloped plenum (like Electro-Voice did) with dual 15s up to 800hz or so.

If you did it the way of the M&K photo you could load the front firing driver into a phase plug, and mount the phase plug on the magnet of the other driver.

So, how high is up?

Click the image to open in full size.

I have been meaning to try this with some 6-1/2" drivers (EV style slant plenum). This could mount to a big horn and just put a single wedge on the vertical faces between the plenums (look at bit like ax-heads).
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Old 8th March 2011, 08:59 PM   #7
Thawach is offline Thawach  Thailand
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good idea ! djk use pp m und k mount with the big FH und put the rpg in it. but the plenum style we can use many more divers with it und mount it with FH. djk i ever heard the PP will be best for low freq but this design[mr] ill get anything from it.
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