Straight horn kick bins
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Category: Plans
Forum Name: Plan Requests
Forum Description: All plan requests here
URL: https://forum.speakerplans.com/forum_posts.asp?TID=98882
Printed Date: 18 April 2024 at 8:28pm
Software Version: Web Wiz Forums 12.06 - https://www.webwizforums.com
Topic: Straight horn kick bins
Posted By: Sypa
Subject: Straight horn kick bins
Date Posted: 12 July 2017 at 2:37pm
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Are there any drawbacks to straight horns for kick besides the obvious depth size ? What free plans are kicking about? Ideally 65-70 to 180-200hz not higher. |
Replies:
Posted By: cravings
Date Posted: 12 July 2017 at 4:43pm
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there's a selenium one. the name escapes me now, hb something i think. or the xtro 15" section. read up biotec's coffin bin threads to see where he landed on all this. |
Posted By: Risc_Terilia
Date Posted: 12 July 2017 at 4:48pm
| One disadvantage is that you're not going to get the band pass loading beneath the minimum horn loading frequency as dictated by the size of the horn mouth. This means if you want the horn to go as low as BPH cabs like HD15, USB, ES18 etc. you'll need a larger horn mouth. |
Posted By: darkmatter
Date Posted: 12 July 2017 at 5:21pm
http://hornplans.free.fr/hb1505c1.html" rel="nofollow - http://hornplans.free.fr/hb1505c1.html Also https://freespeakerplans.com/forum/16-bass/2495-martin-215-mk-ii" rel="nofollow - https://freespeakerplans.com/forum/16-bass/2495-martin-215-mk-ii I'm not sure a straight horn is worth the extra depth if you only need to go to 180-200Hz, starts to make more sense if you want to reach 300-350Hz in my (very non-expert) opinion.
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cravings wrote:Posted By: Sypa
Date Posted: 12 July 2017 at 8:19pm
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That coffin bin thread lost all the pics, annoying. Yea im aware they wont be a standalone bass solution if it comes to that, that is a compromise im willing to take. So what dictates more the lower cutoff the horn mouth or horn lenght? Darkmatter isnt it other way around ,regarding frequency :) |
Posted By: mobiele eenheid
Date Posted: 12 July 2017 at 9:27pm
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The horn length determines the 1/4 wave length resonance, which is often depicted as the lowest the horn will play. This is influenced by other horn parameters though, amongst the horn mouth and throat. If the horn mouth is very large and thus the flare rate of the horn is as well, the horn will appear shorter, on the other hand, if the horn mouth is very small the horn will appear longer. A larger mouth will boost overall efficiency and smoothing things out, a smaller mouth will boost low frequency output, the throat will do the opposite in effect. The deep cabinet is the main disadvantage of a straight horn, the band pass effect can still be created by adding front chamber volume. This will add more low output in exchange for (you've guessed it by now) limiting the upper band width. Best regards Johan |
Posted By: darkmatter
Date Posted: 13 July 2017 at 1:09am
Don't think so... a standard folded horn will likely sound bad playing the higher frequencies. A well designed straight horn should play higher more easily. However the straight horn is likely to be an awkward depth and the HB1505C1 box (for example) has plenty of dead space which could be avoided in a folded layout.
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Posted By: Sypa
Date Posted: 13 July 2017 at 1:45am
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I misunderstood what you said, you mean a straight horn aint worth it at all if just aiming for 180hz upper cutoff... I just realized theres already lots of threads on this subject actually  Understood Mr. Johan, so without needing the bass extension below 70hz and not a particulary great upper cutoff, would have to aim somewhere in between regarding mouths and throats. |
Posted By: MarjanM
Date Posted: 13 July 2017 at 1:51am
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Altec bas bin. ------------- Marjan Milosevic MM-Acoustics www.mm-acoustics.com https://www.facebook.com/pages/MM-Acoustics/608901282527713 |
Posted By: Sypa
Date Posted: 13 July 2017 at 1:56am
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I just stumbled upon Hennesey sound design "the cannon" 18mbh65 . Just what i had in mind actually when i made this thread. |
Posted By: flinnt45
Date Posted: 13 July 2017 at 12:05pm
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Hey Try Inlow sound, should be a design there for you ------------- JAH Kreator Hi Fi |
Posted By: matty w
Date Posted: 13 July 2017 at 1:26pm
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What about the mkb230? Gets good reviews , I like the idea , using 12's in a horn , one fold rite by the throat ! Personally looking for a 12" or 15" design that's pure horn that gets up to 500 and goes down to around the 90/100 area ,actually cant find anything ------------- Black to black , red to red , blue to bits .... |
Posted By: mobiele eenheid
Date Posted: 13 July 2017 at 6:33pm
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Search: Peter Morris diy mid http://soundforums.net/filedata/fetch?id=154186" rel="nofollow - http://soundforums.net/filedata/fetch?id=154186 |
Posted By: FrederikMA
Date Posted: 25 July 2017 at 7:47am
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You will be amazed how good a well designed folded horn can sound even up in the lower midrange. I too started out thinking only a straight horn was a "pure" horn, but really the faultiness of a folded horn is merely the product of all the combined faults in the folding throughout the horn path. I've recently tested a prototype using two 12s on two horns with 3 90-degree bends within 1/2 wavelength (longitudinal) of my intended upper roll-off, the bends being less than 1/4 (cross section) in dimensions. 80-800hz. I was surprised how well defined the upper region was without any processing applied. The lower part needed some FIR/EQ due to the small mouth of a single unit. If aiming for 60/70 from a straight horn, a bandpass/compression chamber solves a few things; it allows a phase bung for well distributed compression for extended high frequencies. It can be used as a diffraction device to control dispersion and wave propagation. It can me rendered to obtain a desired flare rate without surpassing the desired mouth/throat/length dimensions. Designing a true horn with phasebung can be troublesome but really is an interesting journey due to the above "tools". |