BLH w/ High Xmax Driver??? - diyAudio
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Old 16th December 2011, 02:00 AM   #1
goody75 is offline goody75  United States
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Join Date: Apr 2010
Location: Motown (area)
Default BLH w/ High Xmax Driver???

Back-Loaded Horn Question:
Is there anything wrong with using a driver that has a mid to high Xmax for a BLH design - (around 7mm / 3inches)?

What about a speaker with a mediocre sensitivity (~90 db) and higher power handling?
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Old 16th December 2011, 03:52 AM   #2
AllenB is offline AllenB  Australia
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Join Date: Oct 2008
When you use a driver in a horn, using a front horn as the example as this is the standard method, you place the rear of the driver into a box which you use to balance it against the pressure caused by the horn. Drivers for a back loaded horn need to be chosen carefully as you don't have this option.

This process is often referred to as 'reactance annulling' if you wanted to read up on it.
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Old 18th December 2011, 02:49 PM   #3
goody75 is offline goody75  United States
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Location: Motown (area)
Thanks, AllenB. I haven't gotten to it yet but I will do some reading.
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Old 18th December 2011, 07:48 PM   #4
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Join Date: May 2004
Location: Pensacola, Florida
See Rog Mogale's Design (example)
Use the PD1850 for best results.
Precision Devices International Limited
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