MT121 & FANE LONGTHROW COMBO, any advice welcome, |
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Mikkel
Young Croc Joined: 17 May 2013 Location: Huddersfield Status: Offline Points: 549 |
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Hah beat me to it! |
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Hz so good
Registered User Joined: 04 September 2017 Location: Unknown Status: Offline Points: 47 |
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thanks for all your advice, how would I measure the horn length on say a Martin b115 or fane long throw compared to say Es18 bph, do you measure both horns or one? An what do you measure the external perimeter affecting that horn excluding the mouth, say for example I had a single folded horn and it measured 1m x 1m exactly would I be right in assuming that you measure the rear panel at 1m and then the straight edge of the horn at 1m giving me a horn length of 2m? Or am I way off here? Thanks in advance
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Keen
Young Croc Joined: 30 May 2011 Location: Brisbane, Aus Status: Offline Points: 1203 |
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designs like the b115, where the horns splits, you would only measure one side.
It's relatively simple measuring horn length. Start from the center of the driver following the middle point between walls until the mouth. This example uses a tapped horn, but you get the idea |
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Hz so good
Registered User Joined: 04 September 2017 Location: Unknown Status: Offline Points: 47 |
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Nice one cheers for that,
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Hz so good
Registered User Joined: 04 September 2017 Location: Unknown Status: Offline Points: 47 |
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Thought Ide put this fane idea to bed but just out of interest, would it be possible to scale up the drawings by say 25% to accommodate an 18" driver, and coupling 4 together,
The plans for the 15 horn only go down to 60hz, any ideas what could be achieved by going to 18, thanks in advance, cheers
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bitSmasher
Old Croc Joined: 23 June 2012 Location: Melbourne Status: Offline Points: 2296 |
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Out of interest, what design is that? Looks like a scaled down MTH30 - I'm curious about it... Edited by bitSmasher - 06 December 2017 at 8:00am |
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https://www.instagram.com/batteryacidsoundsystem/
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SouthwestCNC
Young Croc Joined: 27 November 2015 Status: Offline Points: 830 |
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As said above, Youre going to need multiples of to get low. scaling a flh kick bin which really designed to be run to 90-400/500hz to go lower it would have to be huge. Driver size increase wont make any odds.. Only way to go lower is to use a longer horn design. So you need a sub design to run under it. The upside to that fane is you don't actually need a midtop. You could just use a coaxial horn and get better point source in the mf/hf. |
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mini-mad
Old Croc Joined: 13 July 2012 Location: london Status: Offline Points: 6903 |
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That isn't scaled.. it IS an mth30. I had one in my bar til about a month ago and would play dance music on it with a pair of sx100 tops and it would pound nicely all night long. I have been contemplating over the past two years to just scale it up to a 15" for fun just to see how it sounds as I do love the design and the 12" version I already have is made of 15mm OSB as it was ment to just be a test bin. But have used it for a good 18months without problem. |
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If it sounds like a gorilla is trying to escape, turn it down.
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DMorison
Old Croc Joined: 14 March 2007 Location: Aberdeen Status: Offline Points: 1647 |
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No it's not. How do you think a 274mm baffle is supposed to support a 12" (nominally 30cm, hence the name) driver?
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Hz so good
Registered User Joined: 04 September 2017 Location: Unknown Status: Offline Points: 47 |
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Ide av thought that going to 18" plus 25% size increase when put in a block of four or so would have yielded some results, just had a play on calculator that fane increased by 25% is pretty big, like 576mm high 1398mm wide and 1183mm front to back, horn lengths around 1500mm give or take, total horn mouth areas in the region of 3900mm per cab,
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SouthwestCNC
Young Croc Joined: 27 November 2015 Status: Offline Points: 830 |
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id still be surprised if it plays as low as you'd like 1500mm horn length is still short for sub. Got the horn resp parameters for it?
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Hz so good
Registered User Joined: 04 September 2017 Location: Unknown Status: Offline Points: 47 |
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No I'm not familiar with horn resp I've emailed you an updated drawing with bigger dimensions on if that helps, cheers
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