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aperrado
Registered User Joined: 10 January 2008 Location: california Status: Offline Points: 315 |
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Im hard to learn but still asking
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tb_mike
Old Croc Joined: 01 October 2004 Location: New Zealand Status: Offline Points: 2744 |
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CV is just like any company where the marketing department have taken over - giving you a number '30hz' for the newbie spec hunters,with 'must use 6 or 8 bins' in small print. 30hz is a little optimistic even with 8 I would think.If the target market is who I think it is,I dont think people will be buying 8 at once to use in a cluster. |
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mykey
Old Croc Joined: 18 August 2005 Location: UK/Indonesia Status: Offline Points: 9680 |
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stick one of these in it and run, this driver is closest to the original CV drivers from days gone bye, it has the thick rubber surround like the original CV driver too
I heard this in a folded horn at a show and thought someone had turned on a wind turbine
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levyte357
The 10,000 Points Club Joined: 10 May 2004 Location: UK, London Status: Offline Points: 11743 |
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With the standard driver, 6x would probably get you 30hz, but not at usefull SPL. However, rebuild the cab using material other than the original kitchen towels, brace it up Tony A.S.S stylee, and put in manly driver, you'll easily get 40hz with 2x cabs per stack. Or maybe we should just "bore it out" to 6.5ft horn, increase horn mouth. and tune throat chamber to PD1850/V18-1000. As this cab is so much easier to build than WSX. Could someone measure/indicate the indicate "actual" horn segments from plan? |
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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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mykey
Old Croc Joined: 18 August 2005 Location: UK/Indonesia Status: Offline Points: 9680 |
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I don't know where you guys are getting 5.5ft from, I just did a rough calc of the 1850 horn and I make it close to 4.8ft it maybe less
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levyte357
The 10,000 Points Club Joined: 10 May 2004 Location: UK, London Status: Offline Points: 11743 |
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http://www.audioasylum.com/scripts/t.pl?f=hug&m=40882 High Efficiency Speaker AsylumRe: On apparent discrepancies between mouth size and reported response of bass horns
In Reply to: On apparent discrepancies between mouth size and reported response of bass horns posted by pk on January 11, 2003 at 03:04:56:
Well, I don’t know about the respected bit, but I’ll try and explain where I’m coming from with my horn designs. If you look at the 1850 horn on the speakerplans site you will see that the response does drop off like a rock below its cutoff point. The horn length is 1.59 meters or 62.59 inches. This equates to a full wavelength frequency of 216.77 Hz. So divide by 4 to get the quarter wavelength figure of 54.19 Hz. Again if you look at the plot you will see it fall sharply below 54 Hz, I also quote the cutoff frequency and state that the design is good down to 54 Hz. I also assume that at least 2 horns will be used in a stack and preferably 4. So I can’t see the problem or see why you could have a problem with this. If I quote that 2 horns have a cutoff of 30 Hz then I would be lying, but I don’t do this. |
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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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justamadman
Registered User Joined: 13 May 2007 Location: United Kingdom Status: Offline Points: 1118 |
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o.k guys enough banter, I'm going to have a have a crack later this week with 3 mates, I'll get the ply cut 1st and then do one each.
going to borrow 4 1850s out of a mates scoops and run all 4 bins of 2 RMX 2450s bridged. just an experiment really, wanna see if moded ones will beat my mates originals, if they're any good we'll probably put them too use. pics and reports to follow |
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in front of the bass bins baby
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jethrocker
Old Croc Joined: 07 June 2006 Location: Chiapas, Mexico Status: Offline Points: 1942 |
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Nice...don't forget to double check those measurements before you cut your ply...don't want to be held responsible if sketchup is a bit off.
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justamadman
Registered User Joined: 13 May 2007 Location: United Kingdom Status: Offline Points: 1118 |
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will do, not much of a problem though. ahhhhh the perks of having friends at lumber companies
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in front of the bass bins baby
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levyte357
The 10,000 Points Club Joined: 10 May 2004 Location: UK, London Status: Offline Points: 11743 |
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I would very strongly recommend you dont do that. RMX2450 does not like 4ohm bridge when dealing with prolonged sub heavy material. Will thermal eventually. If you just want to test them, bridge a couple of ep2500/RMX2450 and run 1x cab on each amp. (8 ohm bridge). That should provide DSB. (Dirty Stinking Bass) If you want to test all 4x, I would recommend a "Pro" big man amp, that can do "min", 1.6kwpc @ 4ohms. Edited by levyte357 - 10 March 2008 at 7:04pm |
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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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justamadman
Registered User Joined: 13 May 2007 Location: United Kingdom Status: Offline Points: 1118 |
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how about an infi8 2 per channel???
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in front of the bass bins baby
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tom smith
Registered User Joined: 17 June 2007 Status: Offline Points: 23 |
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errrrrr, hope your paying for all this yourself because i'm not in a any position to contribute. as for the 1850s they've got rid and put in voids............ why don't you ask Mr. lockdown if you can use his infinite 8??? |
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