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RealitySound 
Registered User
Joined: 01 February 2011
Location: Bermuda
Status: Offline
Points: 528
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 Posted: 15 March 2012 at 11:40pm |
Solid build  I'd go with the ass style brace personally. The horizontal bit is far more important that the vertical. I'd go straight back then angle up a bit where the scoop comes down from the back. As far as I know the crossbracing is alot more for stopping the box resonating/vibrating more than anything. If your feeling creative you can do a brace like the superscooper, then where its horizontal brace ends (15degrees) you can extend it up towards the back of the scoop at an angle too (like the rx18) Others may have other suggestions, but thats my 2 cents. Yamon.
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We learn something every day, and lots of times it’s that what we learned the day before was wrong.
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Ras Loud
Registered User
Joined: 08 January 2012
Location: Amsterdam
Status: Offline
Points: 679
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Posted: 15 March 2012 at 11:46pm |
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Maybe this is a stupid question, but are there actually also people who want their scoop rather resonating/vibrating and leave the mouth bracing out for that reason?
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RealitySound
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Joined: 01 February 2011
Location: Bermuda
Status: Offline
Points: 528
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Posted: 15 March 2012 at 11:59pm |
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I swear I read that somewhere too. I think some people just don't think its a big deal or just can't be bothered. When in doubt, I look at the best scoops on the market. They're all heavy as hell because there braced like crazy. Look at the rx18 for example, double 36 mm bracing throughout entire cab, and Tony drops hints constantly all around these forums that when it comes to differences between scoops innards moving things a cm here or there your not gonna get a huge difference in the output of the cabs, but bracing def does help. If u flog your scoop and touch the sides and feel it shaking/vibrating, just think that bass/pressure could be coming out the scoop instead.
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We learn something every day, and lots of times it’s that what we learned the day before was wrong.
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Ras Loud
Registered User
Joined: 08 January 2012
Location: Amsterdam
Status: Offline
Points: 679
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Posted: 16 March 2012 at 12:07am |
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Cool. Maybe we'll make a comparison after the second one is built, run one with and one without and see if we can hear a difference.
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TONY.A.S.S.
Old Croc
Joined: 21 February 2007
Location: United Kingdom
Status: Online
Points: 4613
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Posted: 16 March 2012 at 1:04am |
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Interesting thread, Just in case you're wondering about the angles of the braces in the RX18, all I did was draw a centre line between the two walls of the horn and thats where I placed the braces. This was to ensure that the open end of the horn was braced evenly.
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Plans? whad'ya mean plans! I thought you said you was a designer.
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levyte357
The 10,000 Points Club
Joined: 10 May 2004
Location: UK, London
Status: Offline
Points: 11734
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Posted: 16 March 2012 at 1:14am |
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EDITED
Edited by levyte357 - 11 May 2012 at 1:41am
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"Who am I? I'm the guy who does his job.. You must be the other guy".
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RealitySound
Registered User
Joined: 01 February 2011
Location: Bermuda
Status: Offline
Points: 528
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Posted: 16 March 2012 at 1:45am |
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Tony do you feel the angles of the horizontal brace has an impact of the direction/ or any influence of the bass/ sound pressure coming out of the mouth? I felt the superscooper brace's upward angle would throw the back pressure up towards the driver and its forward pressure causing a slight bit more cancellation than there already was versus your straight out style.
?
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We learn something every day, and lots of times it’s that what we learned the day before was wrong.
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Ras Loud
Registered User
Joined: 08 January 2012
Location: Amsterdam
Status: Offline
Points: 679
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Posted: 16 March 2012 at 9:30pm |
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Jah Tubbys also uses a horizontal brace without an angle:
http://www.flickr.com/photos/kibir-la-amlak/6781782413/in/set-72157627354577762
The only other thing I wonder about are the vertical braces inside behind the front chamber and to the back. All the old plans have only one vertical brace in the middle, but Jah Tubbys and RealitySound both double brace these sections. Am I right that this is only to make the whole construction more stable and has no influence on the sound?
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RealitySound
Registered User
Joined: 01 February 2011
Location: Bermuda
Status: Offline
Points: 528
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Posted: 16 March 2012 at 9:47pm |
I would say that is correct. The first little pig built his house out of straw because it was the
easiest thing to do.
The second little pig built his house out of sticks. This was a
little
bit stronger than a straw house.
The third little pig built his house out of bricks. All depends what you want to do, but a scoop built with bricks would play the loudest!
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We learn something every day, and lots of times it’s that what we learned the day before was wrong.
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Ras Loud
Registered User
Joined: 08 January 2012
Location: Amsterdam
Status: Offline
Points: 679
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Posted: 16 March 2012 at 9:53pm |
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Another question to Tony (maybe a little bit off topic): Do you know if there is anyone in the Netherlands who uses any A.S.S. scoops? I just realize that I already heard all kinds of scoops, but none of these as far as I can remember.
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bee
Old Croc
Joined: 14 June 2011
Location: Middlesex
Status: Offline
Points: 1710
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Posted: 16 March 2012 at 10:35pm |
the wave lengths are too big for a an angle brace to have any real effect on a scoop at the mouth.... but bracing is a must.....
@ ras loud yes, 2 braces are better than one, a single double brace should be fine (36mm), or 2 18mm braces....
one thing to remember is if your front baffle is 36mm thick, for strength and support, this is under the same stresses as the back section behind it...... a double brace gives twice the support....
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TONY.A.S.S.
Old Croc
Joined: 21 February 2007
Location: United Kingdom
Status: Online
Points: 4613
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Posted: 17 March 2012 at 1:39am |
 RealitySound wrote:
Tony do you feel the angles of the horizontal brace has an impact of the direction/ or any influence of the bass/ sound pressure coming out of the mouth? I felt the superscooper brace's upward angle would throw the back pressure up towards the driver and its forward pressure causing a slight bit more cancellation than there already was versus your straight out style.
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The braces can't have an influence on direction. They are there to make sure the open sides are held tight and the resonance high. That way there is minimal colour added. The waves emitted are too large to be influenced by the braces or the shape. If there were complete short wave lengths in the horn, then the waves would reflect off at a tangent, in other words, the in coming angle would be the same as the out going one. It helps if you have a vision of sound waves traveling and the relationship of wave length V size of object placed in front.
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Plans? whad'ya mean plans! I thought you said you was a designer.
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