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In the Forum: Audio Discussions
In the Thread: Loudspeakers and headphones
Post Subject: Re: Fostex, compression driver MF, aliens and SS [Re: Ronnie's horns]Posted by JLH on: 12/2/2005
Hi Ronnie,
There are a few things that could be causing the alien sounds you site. One, of course, could be certain frequency nodes being excited by room reflections. As long as your room is reasonably dampened, this would not be the case. The second cause and most likely, is the discombobularity formed by mismatching the woofer to the horn throat. What woofer are you trying to use, and what is the throat diameter? These are 115Hz tractrix horns, yes?
As for mid-range horns, you will not need anything larger than a 350Hz tractrix at the most. And more likely you will end up going smaller than 350Hz tractrix. In the mid-range usually you only want to go as large as needed to reach your desired low frequency goal. However, you don't want the size difference between your mid-bass horn and mid-range horn to be too much either. If there is a large difference between sizes, then you start to have directivity matching problems and integration becomes more difficult than it needs to be. Once you finalize your woofer choice and throat, I can better help you on the choice of mid-range horn size and compression driver.
Rgs, JLH