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V-plating 1850s or 186s for free dBs

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Disco Stu View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Disco Stu Quote  Post ReplyReply Direct Link To This Post Posted: 05 May 2008 at 1:56am
It should work with any horn subs except maybe USBs or HD15s because the path isnt very long so the benefit at low frequencies would be minimal.

The taller the horns the more lengths gets added to the horn path and the larger the mouth is

Stu
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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: 05 May 2008 at 4:18pm
Originally posted by Disco Stu Disco Stu wrote:

It should work with any horn subs except maybe USBs or HD15s because the path isnt very long so the benefit at low frequencies would be minimal.

The taller the horns the more lengths gets added to the horn path and the larger the mouth is

Stu


I don't see why it wont work for HD15 or USB? You will increase the horn length this way a bit.
Wont be drastic improvement but it will affect it.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Disco Stu Quote  Post ReplyReply Direct Link To This Post Posted: 05 May 2008 at 10:56pm
Marjan, of course it will work but just not very well. The tests seem to show that the coupling doesnt become as effective above 70Hz-80Hz and since the horns on HD15/USB are so short the cutoff is around there anyway.

Stu
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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: 06 May 2008 at 1:19am
What i was trying to say is that they will that way go a bit lower.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Heathrow_B_line Quote  Post ReplyReply Direct Link To This Post Posted: 06 May 2008 at 7:18am
i would rather strap the cabs securely with a thick ratchet strap then worry about gaining something from v plating
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Disco Stu View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Disco Stu Quote  Post ReplyReply Direct Link To This Post Posted: 06 May 2008 at 11:16am
Originally posted by Heathrow_B_line Heathrow_B_line wrote:

i would rather strap the cabs securely with a thick ratchet strap then worry about gaining something from v plating


Why? you can still fit a strap around cabs that are v-plated, if the plate is attached securely with bolts through the edges of the cab, as some people have done, it should actually help to hold the cabs together better.

Stu
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Post Options Post Options   Thanks (0) Thanks(0)   Quote toastyghost Quote  Post ReplyReply Direct Link To This Post Posted: 06 May 2008 at 12:09pm
Originally posted by Disco Stu Disco Stu wrote:

Originally posted by Heathrow_B_line Heathrow_B_line wrote:

i would rather strap the cabs securely with a thick ratchet strap then worry about gaining something from v plating


Why? you can still fit a strap around cabs that are v-plated, if the plate is attached securely with bolts through the edges of the cab, as some people have done, it should actually help to hold the cabs together better.

Stu


Or strap down either side seperately, behind the plate. It's not too difficult, and having the v-plate might actually make a good base for a DIY tilt-board.
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Disco Stu View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Disco Stu Quote  Post ReplyReply Direct Link To This Post Posted: 06 May 2008 at 12:19pm
There are other things you can do too, like put a metal or wooden foot in the centre at the front of the V-plate to further stiffen it and use it as a platform for vocalists/dancers or PA tops.

It has been reported that the V-plating cuts down the amount of bass which appears to emerge from the rear of the stack as well so this may be of benefit to those who have problems with feedback on the decks caused by the subs.

Stu
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Post Options Post Options   Thanks (0) Thanks(0)   Quote soundsystemdan Quote  Post ReplyReply Direct Link To This Post Posted: 09 May 2008 at 9:50pm
Originally posted by Disco Stu Disco Stu wrote:

It should work with any horn subs except maybe USBs or HD15s because the path isnt very long so the benefit at low frequencies would be minimal.
So this may apply to the ES18-PBH as well? although it is a bit bigger than the other two. Do recall correctly that the 186 has a little bit of bandpass action as well?

and...
what about scoops.Evil%20Smile
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Disco Stu View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Disco Stu Quote  Post ReplyReply Direct Link To This Post Posted: 10 May 2008 at 12:08am
I think the only way to find out is to try, its not an expensive thing to make, could even make it out of MDF I suppose! I think cabs with a taller profile stacked on their sides will have the best result with the coupler but if Bill suggests that it gets +2.5dB on a pair of Tuba 24s which are 24" or 600mm high, I expect it probably would work on short horns as well, just how well the jury will be out on until someone actually does it. I dont use horn subs so it wont be me first!

Stu
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Post Options Post Options   Thanks (0) Thanks(0)   Quote smithers Quote  Post ReplyReply Direct Link To This Post Posted: 18 May 2008 at 1:02pm
posted this in the scoop section, but i thought i'd post it here too for you 1850/186 guys to look at just in case you dont frequent the scoop section.

http://www.speakerplans.com/forum/forum_posts.asp?TID=17034

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Post Options Post Options   Thanks (0) Thanks(0)   Quote bgavin Quote  Post ReplyReply Direct Link To This Post Posted: 24 August 2008 at 7:54pm
Originally posted by Disco Stu Disco Stu wrote:



Heres an image from the BFM site of a chart of V-coupled Tubas vs stacked. The scale is rather too small for my liking but you get the idea.
Stu
 
These measurements are the ones I took on November 11, 2007.  I gave the measurement data to Bill, who adapts the data to his display format.  The V-Coupling technology does indeed work, as shown above.  The boost is most apparent below the 60 Hz power range, but it is quite usable. 
 
BTW, the V-Coupler is a copyrighted technology.  Theft of this intellectual property for commercial purposes will land the individual in a lot of legal hot water.
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