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LeCleach

Posted by Torana (A) on February 23, 2005 at 00:23:51

In Reply to: Re: How do you design a horn for a compresion driver? posted by John Sheerin on February 22, 2005 at 19:09:22:

Or go for something like a tractrix horn or better yet a LeCleach horn for low internal and mouth reflections, better low frequency / flatter onaxis response.

After experimenting with a couple of conicals, and finding they did need a fair bit of EQ, I'm looking at making a couple of round midhorns again. I'm interested in the LeCleach, and have the software working, but I have a question;

When I made my first trax, I saw a post by JLH that said to use 0,707 x the lowest frequecy you wanted to use the horn for the flare rate, eg 270Hz FR for a 400Hz xover. This worked really well with a measured freq resp at -3dB at about 320-330Hz iirc. Do I need to add in any 'factor' with the LeCleach to get the same performance? Or do I simply input the flare rate as the xover frequency? I'm after a 400Hz xover again.
Driver will be a BMS 4592 coax

Having no experience with the LeCleach, any help would be appreciated in the design, as I'm going to build it by a layered laminate method with is very time consuming and labour intensive, so I'd like to only have to do it once.
Thanks

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Herbie's Audio Lab

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