GoodSoundClub - Romy the Cat's Audio Site

In the Forum: Horn-Loaded Speakers
In the Thread: Problems with horns: upper bass

Post Subject: My equalization “theory”.Posted by Romy the Cat on: 11/11/2008

Well, you see, the outer dimensions of the mouth of cause an indications of low end response and by objective evaluation of it is easy to estimate horn’s bass numbers. However, it is very far from “sufficient” assessment. A few years back I completely denied any theory of horns operation and proposed my own “theory” that doe makes applied sense to me – the Frequency Domain Assessment. I refuse to recognize a horn as impedance transformation devise or as pressure transformation devise. I insist that horn is equalization devise and then I refuge to acknowledge anything else about horns. I have written a lot about it thigh my site. From a fist perspective to view horns as ONLY as equalization devise is not a big deal but in really it is radical different view. One of the major distinctions and advantage of my equalization view is that the equalization encompasses everything else and allows evaluating actual results instead of rhetorical rationalization. If you made a horn with specific mouth size, specific throat size, specific driver and specific Fs, with specific bad and front channel and use it with specific low and high pass filters then it is possible to give some estimate about sound of this thing, at least about the pressure that the channel will develop. However, there is much better way of looking at the things – the no BS equalization evaluation of the horn. Take the driver that used in the horn and make a sweep with this driver in open air and then in open baffle of let say 1 sq meter. Then load the driver in the horn and get another sweep on axis. You will see the true performance of your horn and will clearly see where and how the horn boosts, what past of bass some from the driver’s exertion and what comes from horn EQ. With necessary experience of looking into equalization graphs you will lose a need to look at anything else as the EQ graphs will be very illustrating about the true horns performance.

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