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In Reply to: RE: Choose a Low Pass posted by Mr_Steady on July 05, 2015 at 06:35:20
Without considering the behavior of the upper and lower systems your mating together, it would be hard to go past picking ones favorite number.
What are the upper and lower systems, and how do they behave / measure?
Follow Ups:
Tom,
This may be a silly question to ask given what I've read of yours, but here goes.
Does a 3 to 5ms delay between the bass and mid drivers in the 140hz to 175hz region negatively effect the sound quality very much?
Thanks,
Jamie
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Big speakers and little amps blew my mind!
Let me give you one psycho-acoustic consideration.
I have noticed when listening to Neil Young sing, and watching a spectrum analyzer at the same time, being struck by how much of his vocal energy was in the 200hz to 400hz range, and he is considered to have a high pitched voice.
Now it would seem to me that a transducer that could handle everything from 250hz up might very helpful with sound quality, because it would capture the majority of the male voice.
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Big speakers and little amps blew my mind!
I ask the question from the perspective of available high efficiency, or any, bass bins. Lets take as a given an Exemplar mid/tweeter horn that would match the three criteria. Not necessarily one horn for all three.
It comes down to the given physics the bass bins that are available to use; a folded W bass horn may only go to 350hz. A PA style folded horn may only go to 250hz. A powered sub woofer may only go up to 150hz. Straight mid/bass horns could have any number of upper ranges. John Inlow has a gigantic 20hz horn that goes up to 140hz. I am not sure of a PPSL's upper limit, nor a Karlson's for that matter.
Also I guess we could examine the psycho-acoustics of it. A crossover point of 300hz was deemed significant to the Bell Labs researchers. In music isn't there something called the Golden Octave. I just tried to Google it with no luck. Somewhere between 100hz and 300hz.
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Big speakers and little amps blew my mind!
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