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Pd 1850 tuned lower?

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Mark James View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Mark James Quote  Post ReplyReply Direct Link To This Post Posted: 09 July 2014 at 6:52pm
errrr bl on the void is closer to 34.88 i believe and the fs is 34 point something hz and is the pd1850 realy got a qms of 15+???? got to be a typo surely?
me so horny me love you long throw
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Post Options Post Options   Thanks (0) Thanks(0)   Quote prestigedjsdk Quote  Post ReplyReply Direct Link To This Post Posted: 09 July 2014 at 6:56pm
Well I have to apologies to you all.
I HAVE the cubo 18 ext with pd 1850´s in them.
But i did not think they went down deep enough. Lots of spl but not very deep.
And I know that "tuning"/modifying a horn is making a completely new box, but what i meant was if I could get the same kind of sol and throw from the pd´s just lower.
But what i have found this afternoon is that error was in amp rack.
I drove the 2 cubo´s with a brigded crown ma 2400 which should enough power for them, and I have asked on other (danish) forums who said power would not change the sound only volume.
BUT today i installed my newly bought crown ma5000vz instead, I only drove the 2 cubos in stereo mode 3/4 on the throttle knobs and I did not even get to 0 db on the mixer because the sound was REALLY loud. This test was only done i my garage so it is not that reliable, BUT I have however done that test to all my speakers system, just for test and so, but this was clearly the loudest setup I have ever had. Not as deep as my old 4order bandpass double 18´s but the spl on the whole scale more then makes good for that. So I guess the saw is gonna make another couple of cubo´s soon and then I have 2 more blown pd 1850 which need new cardboard and then I am ready to make some noise.
Should i go stereo or parallel mono then on the crown?
But I am sorry for my earlier posts, I did not think the bigger amp would that much difference.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote prestigedjsdk Quote  Post ReplyReply Direct Link To This Post Posted: 09 July 2014 at 7:00pm
a stack of 6 1850 horns is WAY overkill for my events
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Post Options Post Options   Thanks (0) Thanks(0)   Quote cravings Quote  Post ReplyReply Direct Link To This Post Posted: 09 July 2014 at 7:12pm
if you only want singles a side, and you're not happy with cubo extendeds with pd1850s, then you want reflex boxes with modern drivers in them probably. pd1850 is not what you need it seems.
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Mark James View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Mark James Quote  Post ReplyReply Direct Link To This Post Posted: 09 July 2014 at 7:26pm
might not be the extra power you might ave made a cabling error [usualy you would wire the cable differently when running in sterio channels and in bridge] or the smaller amp may have a fault you sure one cab wasnt out of phase with the other when you bridged? its a common mistake :P glad your getting it sorted tho :-]
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prestigedjsdk View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote prestigedjsdk Quote  Post ReplyReply Direct Link To This Post Posted: 09 July 2014 at 7:35pm
yes i am shire there was no phase error, testet or several times. Well the idéer was only having one cab a side. but the cubos are not bigger than most reflex boxes so i will go with 2 cubos a side soon.

Any comments on parallel mono go stereo mode? 
Seems parallel mono should give a lot more power? 
How much watt is the limit in pd 1850 cubo extended? 
Are there any diffent ways of stacking 2 a side that works better?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Geigertron Quote  Post ReplyReply Direct Link To This Post Posted: 09 July 2014 at 10:36pm
If the 1850's are 8 ohm then prob parallel mono is best, don't forget to use a LPF
http://www.crownaudio.com/media/pdf/legacy/103169.pdf

1850's can soak up at least 1.5k

I'm thinking of building the jth-18 at some point, have not had a chance to hear a cubo yet...
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Post Options Post Options   Thanks (0) Thanks(0)   Quote bee Quote  Post ReplyReply Direct Link To This Post Posted: 09 July 2014 at 11:47pm
Originally posted by Mark James Mark James wrote:

errrr bl on the void is closer to 34.88 i believe and the fs is 34 point something hz and is the pd1850 realy got a qms of 15+???? got to be a typo surely?
 
ooops sorry posted specs for the v1200.... changed.... specs still differ... qms of 1850 is as of the pd website, could be a typo...


Edited by bee - 09 July 2014 at 11:54pm
https://www.elements-audio.com
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bee View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote bee Quote  Post ReplyReply Direct Link To This Post Posted: 09 July 2014 at 11:56pm
Originally posted by prestigedjsdk prestigedjsdk wrote:

yes i am shire there was no phase error, testet or several times. Well the idéer was only having one cab a side. but the cubos are not bigger than most reflex boxes so i will go with 2 cubos a side soon.

Any comments on parallel mono go stereo mode? 
Seems parallel mono should give a lot more power? 
How much watt is the limit in pd 1850 cubo extended? 
Are there any diffent ways of stacking 2 a side that works better?
 
the best I found was horn on floor, there was no gain by coupling the mouths, glad you got the cubos making proper noise....
https://www.elements-audio.com
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Post Options Post Options   Thanks (0) Thanks(0)   Quote patryk1305 Quote  Post ReplyReply Direct Link To This Post Posted: 10 July 2014 at 12:19am
Originally posted by bee bee wrote:

Originally posted by Mark James Mark James wrote:

errrr bl on the void is closer to 34.88 i believe and the fs is 34 point something hz and is the pd1850 realy got a qms of 15+???? got to be a typo surely?

 
ooops sorry posted specs for the v1200.... changed.... specs still differ... qms of 1850 is as of the pd website, could be a typo...


I would say there is no significant difference in spec apart from the qms.
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bee View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote bee Quote  Post ReplyReply Direct Link To This Post Posted: 10 July 2014 at 12:36am
Originally posted by patryk1305 patryk1305 wrote:

Originally posted by bee bee wrote:

Originally posted by Mark James Mark James wrote:

errrr bl on the void is closer to 34.88 i believe and the fs is 34 point something hz and is the pd1850 realy got a qms of 15+???? got to be a typo surely?

 
ooops sorry posted specs for the v1200.... changed.... specs still differ... qms of 1850 is as of the pd website, could be a typo...


I would say there is no significant difference in spec apart from the qms.
 
how do you work that out, specs differ a lot.... there are cabs I would use the v1000 over the 1850 and vice versa.....
https://www.elements-audio.com
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Mark James View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Mark James Quote  Post ReplyReply Direct Link To This Post Posted: 10 July 2014 at 11:17am
they are pretty similar but as bee said there are some apps where one as the edge usualy if one is good in a cab to the other would be providing it fits USUALY
if thats te case i would suggest getting the smaller amp checked out and check te cables you used for bridge as i said they should not be wired te same as for normal operation [im sure te ma do bridge on both channel + pins no?]
me so horny me love you long throw
horn loaded for her pleasure
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