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Old 2nd September 2013, 11:18 AM   #1
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Question 12" symmetrical tapped horn plan?

Hi all,

I have a sound system consisting of 4 cbx-18s and 4 mth30s for kick. For purely aesthetical reasons combined with the theoretical benefits of symmetrical driver loading in a tapped horn that ive read so much about, I'd like the kick section to essentially be baby cyclopses. I'm not nearly skilled enough to know where to even start designing one (even though I wanna be soon) so is there a something like this, or can someone help me design one so I can learn?
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Old 2nd September 2013, 11:52 AM   #2
djk is offline djk
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I don't think the tapped horn would make a good kick cabinet because of the rapidly changing group delay and phase at the upper and lower crossover points.
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Old 2nd September 2013, 12:18 PM   #3
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I don't quite understand group delay and the phase response of tapped horns confuses me but I'm having a lot of success with the mth 30 besides a little notch, is there any alternative you'd suggest with similar dimensions and response?
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Old 2nd September 2013, 02:32 PM   #4
epa is offline epa  Netherlands
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for kick range i suggest a front loaded horn,br or closed.
th is not a good ideea.
what driver are you gona use for it?
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Old 2nd September 2013, 02:52 PM   #5
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Imo the mth30s I have sound better in kick than the 15" flh I'm used to, not as agressive but with just authority, but like I said I'm open to suggestions
I'm using rcf l12p110k drivers now but I'm looking to put something very different in these ones.

If it makes a difference I find myself playing kick at 60-125 which I suppose constitutes just bass in some books

Even if not for this particular project, a 12" symmetrical tapped horn would still be awesome
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Old 2nd September 2013, 03:57 PM   #6
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Do some lightweight straight horn 15" midbass.
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Old 2nd September 2013, 06:21 PM   #7
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That's what I had before the mth-30s, I really like the mth more! I'm kinda surprised using a tapped horn as kick isn't recommended as it sounds nicer than a lot of things I've heard in the past
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Old 2nd September 2013, 06:35 PM   #8
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Quote:
Originally Posted by djk View Post
I don't think the tapped horn would make a good kick cabinet because of the rapidly changing group delay and phase at the upper and lower crossover points.
Having compared TH and FLH of similar response I would not dismiss TH for the "kick" range.

As you can see below in the comparison of a dual 10" TH and two 15" C horns (similar to a shrunken LabHorn) both using a BW 25/125 filter, phase response is quite similar in shape.

Subjectively, the smaller 2x10" TH had similar "kick" to the Chorn in side by side tests.
Using a single 10" version for a drum monitor in my "baby" system, playing up to around 250 Hz crossing in to a pair of 5" & tweeter.
A techno drummer/DJ was quite impressed by the "punch" and clarity.

Anyway, not a symmetrical TH (sorry Shokzi), but TH can do just fine in the kick region.

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Old 2nd September 2013, 07:22 PM   #9
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I'm kinda lost, I thought symmetrical tapped horns performed the same as others, I thought/hoped it was as simple as an alternative folding pattern for a tweaked mth 30?
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Old 2nd September 2013, 07:43 PM   #10
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Quote:
Originally Posted by shokzi View Post
I'm kinda lost, I thought symmetrical tapped horns performed the same as others, I thought/hoped it was as simple as an alternative folding pattern for a tweaked mth 30?
They perform the same, but use more wood (and weight) to achieve the same horn path length.

Heavier and more material for the same Fb, you pay for symmetry .

But since you are building "for purely aesthetical reasons", no problems .
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