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In Reply to: RE: For my clarity please, posted by b.l.zeebub on May 27, 2015 at 05:52:47
"So to get the same bass output from an OB as a box speaker using the same woofer at 10W you might need 160W"
That is the most common mistake/misconception, you should not be using a woofer designed for a box in a dipole speaker system to produce bass. Use a woofer with a high Qts, which is not really suitable for a box, to offset the dipole roll-off of an OB. You need to think outside the box and throw away the years of box thinking. The resulting SPL will be in the same league as a boxed woofer system, and to head off the next arguement the bass will not be boomy because of a Qts value >= to 1.0 (that again is box thinking).
Follow Ups:
How exactly does a high Qts stop the acoustical short circuit?
It doesn't.
But combine a 6 dB per octave loss due to the OB with a peaking SPL response from the high Qts driver and you can end up with a system response that is just right. It is all in the combination of driver, baffle, and crossover.
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