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In Reply to: RE: Help Needed Selecting The Right Hi-Efficiency Subwoofer posted by Mr. Lowther on May 06, 2017 at 08:44:04
People all the time complain that the subwoofer is not "fast enough" to keep up with a Lowther. If it is a backhorn, most people will want to place the subwoofer in line with the speakers, hence the subwoofer will be out of phase with the backhorn and, of course, they conclude that the subwoofer is too slow.
What they need to do is move the subwoofer back until they are phase aligned with the backhorn bass. The problem is if they room is not large enough and cannot move the back horn speakers forward enough to allow the subwoofer to be moved back enough, their subwoofer will not be in phase with the backhorn bass. Then you need to phase-delay the subwoofer.
Having used Hedlund Horns for so many years, I was always surprised at how little the difference in phase between the front of the driver and backhorn was noticeable - maybe I subconsciously chose to ignore it. But others who heard my system did not seem to notice either.
Google up Nelson Pass' Kleinhorns And his necessary Massive Sub Assembly.
Good primer on what level of involvement it requires to get Lowthers /horns to produce a full spectrum sound.
There are Far simpler paths to good sounds.
I agree with you. It is a challenging intellectual exercise to get a single driver to cover such a wide bandwidth (i.e., 30 hz to 20 kHz). But as soon as you try to get the wide range driver to reproduce frequencies below 100 hz (using a multiorder crossover on the wide bandwidth driver, or you need to crossover over even higher), IM distortion increases exponentially.
Keep the wide bandwidth drivers to above 100 hz and find bass drivers for the rest. Of course, you can likely do better at a lower price point by using a separate midrange driver and tweeter. There are coherency issues that are challenging when trying to integrate more drivers, though.
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