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3 way tops (100hz and up)

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cravings View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote cravings Quote  Post ReplyReply Direct Link To This Post Posted: 31 March 2020 at 3:05pm
that was "discosucks" whos system was fire damaged.
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thepersonunknown View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote thepersonunknown Quote  Post ReplyReply Direct Link To This Post Posted: 31 March 2020 at 7:11pm
Originally posted by DMorison DMorison wrote:

If you haven't already, it might be worth a look at Peter Morris's https://soundforums.net/community/threads/new-diy-mid-high-90deg-aka-pm90.11601/ PM90 (& PM 60 on the same site). He too was looking for an efficient low mid horn and came up with something that has certain similarities to your proposed folding, just in a dual 12 version. He certainly uses the single fold and narrow cross section characteristics that you've already identified as useful in getting better HF extension than a typical kick bin/BPH style layout.

Re the H3, I think the XO was 280 so you're about right with your recollection.
These are not my images but from a forum member who had theirs fire damaged a while ago - I can't find the original post but had saved the image out of curiosity.
Looks like the 15 is mounted almost horizontally.



Hey.

Yea ive seen that. If the prototye with the singe works out ill be doing a 2 x 12 one as well. We do seem to be thinking in the same direction, and from what i read the other day, this folding scheme and set of principles does seem to work well for the lower mid range.

Thanks for the pics of the H3. I cant quite make it out in the pic, but does that slot throaght go straight into the first section of the horn in a FLH layout, or does it go into a chamber BPH style?

Cheers.
They keep telling me life is short, but its the longest thing ive ever done!!!
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thepersonunknown View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote thepersonunknown Quote  Post ReplyReply Direct Link To This Post Posted: 31 March 2020 at 7:36pm
Too bad about the fire BTW. Sorry to hear it; too nicer boxes to go out like that.
They keep telling me life is short, but its the longest thing ive ever done!!!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote thepersonunknown Quote  Post ReplyReply Direct Link To This Post Posted: 31 March 2020 at 8:39pm
Something that has been bugging me.

From what ive seen from designs of this type which play high and others that dont, there seems to be some kind of relationship between the distance of the fold from the cone of the driver and the wavelength of the highest frequency which it can play well. 

My technical background is lacking to even be able to begin to calculate or simulate this, but there seems to be something there. It might be possible that if this first section of the horn (before the bend) exceeds a particular fraction of the shortest required wavelength it causes problems????

Anyone have any ideas on this point?
They keep telling me life is short, but its the longest thing ive ever done!!!
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