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V18-1200 Test Results. |
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mykey 
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Joined: 18 August 2005 Location: UK/Indonesia Status: Offline Points: 9680 |
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 Posted: 18 June 2007 at 11:32am |
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I'm thinking it has something to do with not liking the small opening (throat) rather than not liking small chamber's?
I PM'd you about it Edited by mykey - 18 June 2007 at 12:52pm |
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Rog
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Rogers Archive Posts Joined: 23 March 2010 Status: Offline Points: 2166 |
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Posted: 18 June 2007 at 12:35pm |
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Yes you did,
and I'm replying here.
Yep, the throat or start of the horn will effect how well the horn works with the driver you use. You are trying to match the front chamber size, the throat area and drivers T/S's so that all are in harmony and you get the best proformance. Its a juggling act and can explane why I've found the V18-1200 to work well in samll front chambered scoops, but Tek and Lev found it didn't work in the RX18 scoop. Its not all about the camber size. Throat area will also effect how well the design works. Smaller throats should give a wider bandwidth but reduced output.
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Tekasis
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Joined: 03 July 2006 Status: Offline Points: 6492 |
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Posted: 18 June 2007 at 5:24pm |
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Apologies Rog, I read it thinking you meant that was the total power spec of the amp.
What I still can't get my head around is, the way how these drivers sounded so powerful using just 775w, at a level which I normally wouldn't have to play at constantly, why would someone want to put 1200w or more into these drivers ?
Even when using the baby Peavey CS1000X which I think at 8ohm is only delivering about 325w maybe even less, basically tickling it, just before the amp clip light came on, the boxes are still performing hard.
We've connected four v18-1000's to one side of a Peavey CS4000 amp which I think each driver gets around 500w each, & the result is still good. So what am I doing/thinking incorrectly ? Am I not using the amps & drivers safely by not giving myself enough headroom ?
If 4 of these v18-1200's are connected to one channel of the Inf8_v2's (2ohm) how much will each driver be getting ?
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Tekasis
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Joined: 03 July 2006 Status: Offline Points: 6492 |
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Posted: 18 June 2007 at 5:37pm |
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The scoops SL now have, do they have that triangle at the bottom of the rear board in the chamber to reduce the throat, or is that not needed on larger chambered scoops bins ?
Strange!
It cannot have anything to do with the padding around the rear of the driver can it ? otherwise the standard v18-1000 wouldn't sound so good loaded in it, so it could be to do with the t/s of the driver. (The Vas + other stuff)
If Tony 'A.S.S' gets hold of one he could see what he comes up with in his variety of RX cabs.
Edited by Tekasis - 18 June 2007 at 5:38pm |
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Rog
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Rogers Archive Posts Joined: 23 March 2010 Status: Offline Points: 2166 |
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Posted: 19 June 2007 at 2:19am |
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Tek,
Each driver will get 950 watts if you hang 4 from each side. In reality it will be a bit more than this as I've been very conservative with the output power ratings.
No, the SL scoops don't use the triangle to define the start of the thoat like the super scooper does.
The more power you can give anyhing the better. But 500 watts from a peavey is better than nothing. Ha ha, well almost.
No, its not the padding or wading around the driver that would cause it to perform badly. Sounds like Tony has designed the RX18 for very tight drivers with low Vas and low Qts. The V18-1000 is very tight so its why it seems to like the RX18. V18-1200 is not so tight so it would appear that the RX18 does not like it. Maybe the RX18 has a small throat, in which case it would need a tighter driver to overcome the higher compression ratio. Oh dear, what have I done, I've entered a new thing to worry about in scoops.
Edited by Rog Mogale - 19 June 2007 at 2:21am |
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mykey
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Joined: 18 August 2005 Location: UK/Indonesia Status: Offline Points: 9680 |
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Posted: 19 June 2007 at 2:54am |
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Rog
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Rogers Archive Posts Joined: 23 March 2010 Status: Offline Points: 2166 |
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Posted: 19 June 2007 at 3:24am |
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Oh, so you are calling the triangle bit a dogleg?
The triangle bit will make the front chamber and throat smaller and the horn length longer. Good for use with some drivers.
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mykey
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Posted: 19 June 2007 at 3:55am |
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yes
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jethrocker
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Posted: 19 June 2007 at 3:10pm |
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yes mykey, we thought you meant that bit.. so now we're clear on that?
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Tekasis
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Posted: 19 June 2007 at 10:49pm |
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RiddimKid
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Posted: 20 June 2007 at 3:53am |
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Sexy
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mykey
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Posted: 20 June 2007 at 4:08am |
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Rog Mogale wrote:
