21” Tapped horn
Printed From: Speakerplans.com
Category: General
Forum Name: Advanced Discussion
Forum Description: Advanced discussion area for higher lifeforms
URL: https://forum.speakerplans.com/forum_posts.asp?TID=103055
Printed Date: 27 March 2026 at 6:37am
Software Version: Web Wiz Forums 12.08 - https://www.webwizforums.com
Topic: 21” Tapped horn
Posted By: Father-Francis
Subject: 21” Tapped horn
Date Posted: 29 December 2018 at 9:22am
so I want to play around with them abit see if I can get one that will fit under my 215martins , is there anyone apart from Toasty using tapped horns here ? Santa passed by me over Christmas and left these under the tree   
------------- Music is the strongest form of magic.(+45 31879997)blakmanpro@gmail.com, foa@sweetboxaudio.dk |
Replies:
Posted By: Jo bg
Date Posted: 29 December 2018 at 9:31am
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Hi Give a look at diyaudio subwoofer forum, there is a thread about "30Hz tapped horn" that contains 21 inch designs and ideas. The Othorn is the 21 tapped horn I d like to hear... And danley 221. Ps we use 18 inch th118 tapped horns.
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Posted By: Father-Francis
Date Posted: 29 December 2018 at 9:47am
Am over there already been reading alot over the last few months, I got Josh’s Othorn on the table as we speak, I like a balanced setup so the cab should be about 950mm deep or more cause the martin’s are like 930mm , I don’t like the kicks sticking out over the subs , lots of the designs, on there have maybe wrong size for me or don’t go low . Our Br’s which is my design do 25hz so I want to stay down there , Danley most too much , I don’t copy stuff from pro companies, unless they are 20years old and I get a thumbs up, from designers. I got a drawing or two of my own, so I needed abit of inspiration. That’s all , i’ve Heard the Danley 18” , sounded very clean and low kind of sound you fall in love with. If you get what I mean . ------------- Music is the strongest form of magic.(+45 31879997)blakmanpro@gmail.com, foa@sweetboxaudio.dk |
Jo bg wrote:Posted By: rish
Date Posted: 29 December 2018 at 10:38am
Lucky you...I want your Santa
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Posted By: FOO
Date Posted: 29 December 2018 at 12:03pm
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Hi Francis 🙂 Why did you choose 21SW152 over 21DS115? I am on a project also 😂
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Posted By: corell
Date Posted: 29 December 2018 at 12:40pm
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You are going to need quite a bit of front chamber volume for the 21sw152, more than othorn etc. which are designed for ultra low qes chassis. I'm running my own 18" Tapped horns "tuned" to 28Hz, 90x60x90 cm |
Posted By: Father-Francis
Date Posted: 29 December 2018 at 1:54pm
A mate of mine has done this one of which I could do a 221 of or start fresh on a new one this one does 27hz and is a 4ohm driver not 8ohm like i’ve gotten, bu the cab will be 1430mm*1070*630mm around 170kg , so i’ve Got an idea about chamber size and stuff , how’s your cab loaded ? FOO it’s cause I got a br design for it too so it’s like killing two birds with one stone plan .   ------------- Music is the strongest form of magic.(+45 31879997)blakmanpro@gmail.com, foa@sweetboxaudio.dk |
Posted By: corell
Date Posted: 29 December 2018 at 2:57pm
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mine is loaded with 18NLW9601 and has about 60l of frontchamber. yours will need even more. Im just pointing this out because TH118, Othorn and the likes have pretty much no frontchamber volume but my experience with simulating A LOT of different THs and drivers suggests the higher qes the bigger vtc needs to be in order to flatten response above quarter wave resonance. this correlates well with ported enclosure theory. |
Posted By: IvCu
Date Posted: 30 December 2018 at 8:24am
hi Father-Francis, I'm running othorn + martin215mk3 combo for some time already, send me a pm if interested they fit really well! https://postimg.cc/grRSsYJX" rel="nofollow - https://postimg.cc/grRSsYJX Cheers Ivan
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Posted By: Father-Francis
Date Posted: 30 December 2018 at 12:04pm
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Ivan the first picture is nice , the next next three are even better , you build sure cabs too ? I know that’s bit more analog, better are than the Powersoft digital amps ------------- Music is the strongest form of magic.(+45 31879997)blakmanpro@gmail.com, foa@sweetboxaudio.dk |
Posted By: IvCu
Date Posted: 30 December 2018 at 3:18pm
| Thanks and hmm not sure what you are referring to, I just see some random ads around photo |
Posted By: Father-Francis
Date Posted: 30 December 2018 at 7:57pm
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I was half asleep writing that, what I wanted ask how do they sound together and do them Othorn sound ?
------------- Music is the strongest form of magic.(+45 31879997)blakmanpro@gmail.com, foa@sweetboxaudio.dk |
Posted By: discosucks
Date Posted: 31 December 2018 at 10:44am
Really nice!
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Posted By: BP1Fanatic
Date Posted: 11 January 2019 at 9:32pm
Love the all horn stack!
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Posted By: Jay michali
Date Posted: 21 January 2019 at 5:57am
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That Martin and Othorn stack! Please tell us what you think of this combo? |
Posted By: Cheif_Stringer_
Date Posted: 25 March 2019 at 6:00pm
/\ what he said ------------- "nice one matee" |
Posted By: IvCu
Date Posted: 25 March 2019 at 8:28pm
| Combo works great! I experiment a lot with eletronic/acoustical crossover points and results just keep getting more interesting. The only downside for many people is that combo like this is impossible to tune by ear - you really have to spend time measuring boxes and figure out how they work, especially together |
Posted By: snowflake
Date Posted: 25 March 2019 at 10:15pm
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I spent a long time modelling and drawing this design but never got round to building a prototype. It's 21" and 1220*850*610mm. Probably only does 35Hz but was designed to optimise max output per unit volume. Uses two sheets of wood plus another half sheet for bracing and double thickness mouth walls. I was going to mount the driver on a separate baffle to provide clearance and so that different throat arrangements could be tried. If anyone wants to experiment with a new design I can send the .dwg file  |
Posted By: kevinmcdonough
Date Posted: 27 March 2019 at 12:33pm
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Are you set on a tapped horn? I've been messing about with ideas for a 21" ported horn that is coming together nicely. It really seems to shine with the 21DS115 driver, but I can try and make a few adjustments see how your driver will go in it. I'm gonna pull up an old thread I started about it later today and get some people's thoughts. K
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Posted By: BP1Fanatic
Date Posted: 13 June 2019 at 4:47pm
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Ported & tapped horns are both BP6's! Ported horn = parallel tuned BP6. Tapped horn = series tuned BP6. |
Posted By: Father-Francis
Date Posted: 28 July 2019 at 5:10pm
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Yes boss Am still hooked on the tapped horn , i’ Had two B&C 152’s standing here for too long .
------------- Music is the strongest form of magic.(+45 31879997)blakmanpro@gmail.com, foa@sweetboxaudio.dk |
Posted By: snowflake
Date Posted: 12 January 2026 at 1:58am
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danley has put the big faital 21" in a tapped horn https://www.danleysoundlabs.com/products/th121/" rel="nofollow - https://www.danleysoundlabs.com/products/th121/ |
Posted By: Contour
Date Posted: 12 January 2026 at 3:19pm
| Thanks, this new Danley sub looks hefty! |