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Point source array - Caterpillar

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tamuks View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote tamuks Quote  Post ReplyReply Direct Link To This Post Posted: 12 May 2012 at 9:16pm
gud work there mykey .just out of curiosity can you show us the drivers for theese cabs coz l think u must have made custom horn flares for your coiax 12s loved the piglet to the extent of making mine as for the 12s try making some which u can put on trypoid stands and make the bass cabs spherical as well .can get good market for weddings and commecial functions hey . luv the work looks like u gonna need a nice long flight case for those beautys
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Post Options Post Options   Thanks (0) Thanks(0)   Quote mk2_ginger_biscuit69 Quote  Post ReplyReply Direct Link To This Post Posted: 12 May 2012 at 9:31pm
he already has done sphere subs, midtops etc, its a cool looking range!

''Remember that the object of a subwoofer is to enhance the output of your main speakers, not overpower it''

''Dubstep - an elongated electronic fart''
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Post Options Post Options   Thanks (0) Thanks(0)   Quote njw Quote  Post ReplyReply Direct Link To This Post Posted: 12 May 2012 at 9:49pm
   How funky would a few of those look hanging around the ceiling of a club painted in a vivid colour, or even better, uv white!, I think you're on to a winner there MykeyThumbs Up.

Edited by njw - 12 May 2012 at 9:53pm
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Wrek0ne Quote  Post ReplyReply Direct Link To This Post Posted: 12 May 2012 at 11:54pm
Mykey do you have a website up and running at the moment? 
Poll this!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote mykey- Quote  Post ReplyReply Direct Link To This Post Posted: 13 May 2012 at 6:21am
Originally posted by toastyghost toastyghost wrote:

If it's going to be flown, would inputs not make more sense at the top of the array (or both top and bottom for flexibility)? I'd rather run cabling across the truss or similar and have it be as invisible as possible if using something that looks as nice as these do!
They have a anchor point just below the socket, so the cable will run along the anchor .....be it chain or wire bond. But will give it a thoughtTongue thanks. These are now going to be Active anyway.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote mykey- Quote  Post ReplyReply Direct Link To This Post Posted: 13 May 2012 at 6:29am
Originally posted by tamuks tamuks wrote:

gud work there mykey .just out of curiosity can you show us the drivers for theese cabs coz l think u must have made custom horn flares for your coiax 12s loved the piglet to the extent of making mine as for the 12s try making some which u can put on trypoid stands and make the bass cabs spherical as well .can get good market for weddings and commecial functions hey . luv the work looks like u gonna need a nice long flight case for those beautys
Like this....was about 2 years ago. An Iron Maiden sound engineer was here on holiday and heard this, he couldn't complement me enough (let the jokes flow)

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Rawcardo View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Rawcardo Quote  Post ReplyReply Direct Link To This Post Posted: 13 May 2012 at 7:54am
Originally posted by kevinmcdonough kevinmcdonough wrote:


They wouldn't give two f*ucks about the vertical comb filtering that would result, just that it looked good and made a noise.


i was under the impression that circular bins were the best shape, just that they were hard to make.
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kevinmcdonough View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote kevinmcdonough Quote  Post ReplyReply Direct Link To This Post Posted: 13 May 2012 at 8:15am
Originally posted by Rawcardo Rawcardo wrote:

Originally posted by kevinmcdonough kevinmcdonough wrote:


They wouldn't give two f*ucks about the vertical comb filtering that would result, just that it looked good and made a noise.


i was under the impression that circular bins were the best shape, just that they were hard to make.


in terms of the acoustics of each individual cabinet (or each individual section within Mykeys 4 speaker one) then yeah, circular ones have a lot of advantages with no internal parallel walls etc. But the problem we initially spoke about comes because of the way the cabs will play together.

because he has four speaker sections in a row within this cab, essentially he's making almost a small line array, and there are very specific rules that need to be followed because of the way the sound from each speaker within the cab is going to interact with the others below and above. One of the main rules is that the physical spacing for each driver (centre to centre) should be less than half of the highest wavelength it'll be playing, to stop comb filtering (cancellations).

For low and mid frequencies this isn't too much of a problem because the spacing of the drivers is close together compared to the wavelength of those frequencies. But for upper mid and high frequencies, as the wavelength gets progressively smaller and smaller the spacing of each driver is going to get into similar distances to, and then become bigger than, it and problems will start to occur.

Line array companies spend significant time and money developing fancy wave guides and horn profiles that (attempt to) fix this and change the HF output from a single point to a complete line all the way down the cabinet so that they remove the idea of spaces between each one, its one of the main problems when designing an LA box.

but because Mykey has used coaxial drivers, he has his HF section at the centre of each one and cant (or at least its much harder! Smile ) to do this and so he'll have four individual HF sections with space between them and so will have comb filtering.


However he does claim to have at least minimised this using custom horns, and he knows his stuff so I don't doubt there will be something clever happening and it would be nice to get some more details if he is able to share without revealing too many secrets.....(hint hint!! Tongue)


k





Edited by kevinmcdonough - 13 May 2012 at 8:18am
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Tony Wilkes View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Tony Wilkes Quote  Post ReplyReply Direct Link To This Post Posted: 13 May 2012 at 9:25am
It is also worth bearing in mind that comb-filtering in the vertical plane is not so easily noticed as the horizontal plane. Very rarely do we listen to a PA whilst bobbing up and down.

The differences which would mainly be at upper HF would probably not be noticed by anyone who was not specifically listening for them, although no doubt easily measurable.

That said I personally would not equip all of my balls with a comp, probably just every other one, but this as Kevin has stated does not take into account what Mykey has done with the wave-guides.

Tony




Edited by Tony Wilkes - 13 May 2012 at 9:26am
www.forteaudio.eu - BMS - db-Mark Processors - Lexon (SAE)
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mykey- View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote mykey- Quote  Post ReplyReply Direct Link To This Post Posted: 13 May 2012 at 11:14am
my balls are equipped with pussy guides
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Tony Wilkes View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Tony Wilkes Quote  Post ReplyReply Direct Link To This Post Posted: 13 May 2012 at 12:46pm
Yes Mykey you can just see them if you look carefully, look pretty well used to me !!
www.forteaudio.eu - BMS - db-Mark Processors - Lexon (SAE)
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MarjanM View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote MarjanM Quote  Post ReplyReply Direct Link To This Post Posted: 13 May 2012 at 1:02pm
Kevin, dont forget that this is point source array. Not Line array. If Mykey use horns with15-20 degree vertical dispersion then it will all be just as it should be.
Very good job there Mykey. Now paint it yellow and put some antennas on the top one. It will be the cutest box assembly ever :-).
Marjan Milosevic
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https://www.facebook.com/pages/MM-Acoustics/608901282527713
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