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Kick Horn / Bass horn like Function One Res 4
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janovic_x View Drop Down
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    Posted: 21 August 2013 at 5:01pm
hi

i saw the Function One Res 4 and its really an amazing box!

Im interested in building some new tops and im interested in an 12" horn / Kick bass filler like the Res 4!

On the website of Function one it says:
12" 114 - 445Hz 105dB 300W 8Ω

How is it possible, what kind of a design, to play up to 445 Hz?

Anyone an idea or any similar designs?

(Of course no one got the Res 4 plans and im not asking for them!!!)

thanks!
Jan
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Points: 2479 		Post Options Post Options   Thanks (0) Thanks(0)   Quote boots-hifi Quote  Post ReplyReply Direct Link To This Post Posted: 21 August 2013 at 7:32pm
Hear we go.....LOL
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Points: 80 		Post Options Post Options   Thanks (0) Thanks(0)   Quote janovic_x Quote  Post ReplyReply Direct Link To This Post Posted: 25 August 2013 at 12:18pm
Again:

Of course no one got the Res 4 plans and im not asking for them!!!


I want new tops, and i want to use them single for small events too but i dont want any reflex boxes.
Im looking for something like
Xtro but a little bit smaller, not 2x15", only 1x12" for a little (kick)bass support but it has to play high enough to get a 8" or 10" for the mids!


So, whats about a HD12? Anyone build something like that?
Thanks for your help!
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Keen View Drop Down
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Points: 1271 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Keen Quote  Post ReplyReply Direct Link To This Post Posted: 25 August 2013 at 12:39pm
Janovic_x,

he's not having a go at you for referencing F1. It's just that when you get into this design process a bit more you'll realise that what you're asking is very difficult to answer. In the land of horns, it's one of the most challenging pass bands to get right. And also this question comes up a lot so boots is just telling it how it is, here we go again. Welcome to the party mate!
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MarjanM View Drop Down
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Points: 7845 		Post Options Post Options   Thanks (0) Thanks(0)   Quote MarjanM Quote  Post ReplyReply Direct Link To This Post Posted: 25 August 2013 at 12:51pm
It is possible to go that high because they use a custom made driver that you can not buy anywhere.
Same with the mid driver that has that axe shaped phase plug mounted directly to the driver.
Marjan Milosevic
MM-Acoustics
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corell View Drop Down
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Points: 1159 		Post Options Post Options   Thanks (0) Thanks(0)   Quote corell Quote  Post ReplyReply Direct Link To This Post Posted: 25 August 2013 at 2:04pm
am i the only one thinking that there is allready a diy design for exactly that purpose, but just nobody builing it?
MKH 230 , maybe a single version on hornplans free.fr
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MarjanM View Drop Down
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Points: 7845 		Post Options Post Options   Thanks (0) Thanks(0)   Quote MarjanM Quote  Post ReplyReply Direct Link To This Post Posted: 25 August 2013 at 2:09pm
Also i dont consider the 12 inch par of res4 as a "kick". It starts at like 120Hz and up.
Marjan Milosevic
MM-Acoustics
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doober View Drop Down
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Points: 1123 		Post Options Post Options   Thanks (0) Thanks(0)   Quote doober Quote  Post ReplyReply Direct Link To This Post Posted: 25 August 2013 at 10:46pm
It shouldn't be too difficult to make a similar low mid horn. The horn will need to be around 85cm long, thus needing a fold. A suitable driver will have a high resonance, low Qts, therefore will be a quite light cone with smallish coil and low power handling. You don't want a high power, high xmax, large voicecoil driver.
Blahblahblah
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MarjanM View Drop Down
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Points: 7845 		Post Options Post Options   Thanks (0) Thanks(0)   Quote MarjanM Quote  Post ReplyReply Direct Link To This Post Posted: 25 August 2013 at 10:51pm
Why when you can have the same in a strait horn of about 50cm with a high power big xmax driver?
Marjan Milosevic
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doober View Drop Down
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Points: 1123 		Post Options Post Options   Thanks (0) Thanks(0)   Quote doober Quote  Post ReplyReply Direct Link To This Post Posted: 26 August 2013 at 9:58pm
A 50cm horn will only load to around 175hz. It is of course possible to get more low end out with a brute force approach, but this is different to the f1 design which Janovic likes.
Blahblahblah
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MarjanM View Drop Down
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Points: 7845 		Post Options Post Options   Thanks (0) Thanks(0)   Quote MarjanM Quote  Post ReplyReply Direct Link To This Post Posted: 26 August 2013 at 10:52pm
Depends on the driver used. High xmax driver with bigger back chamber will go much lower. 
Marjan Milosevic
MM-Acoustics
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janovic_x View Drop Down
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Points: 80 		Post Options Post Options   Thanks (0) Thanks(0)   Quote janovic_x Quote  Post ReplyReply Direct Link To This Post Posted: 29 August 2013 at 10:55am
Thanks for your replies!
I think the mkh230 looks like something i look for, but its a little bit too big (depth), but perhaps.... lets see ;)

@MarjanM:
What is a "high" XMas Driver for a 50cm Horn? I mean, what is "high" xmas for a mid driver?
For example, the MT130 is a "40cm Horn" and goes down to 120 Hz with the PD121 (2,7mm XMas)!
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