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Database simulation |
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bitzo 
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Joined: 20 November 2007 Location: Italy Status: Offline Points: 977 |
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 Posted: 09 September 2008 at 8:31pm |
 very good work.
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bitcore
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Joined: 12 February 2007 Location: United States Status: Offline Points: 168 |
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Posted: 13 September 2008 at 5:00pm |
But what's wrong with wanting to replace a blown driver in an AB-36 you already own with a different driver, say a PAudio SD18, but you want to model it's response to see how well it would work first... I believe the whole copyright issue is to prevent people from making money off a patented design. Once your product is out, there's nothing stopping anyone from taking a tape measure to the insides and simulating a response... I'm sure many aspects of QSC's amps are patented, but they make repair schematics available on their website. Edited by bitcore - 13 September 2008 at 5:06pm |
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bitzo
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Joined: 20 November 2007 Location: Italy Status: Offline Points: 977 |
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Posted: 20 September 2008 at 9:01pm |
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when cerwin vega release its plans on its site, I'll post the simulation...however you can find the plans on the net and you can try to do the simulation by yourself. It's not harder, I use inkscape openoffice calc to get the data from the plans, free tool you have only to try mate :)
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sKs01
Old Croc 
Joined: 11 April 2008 Location: sheffield Status: Offline Points: 1744 |
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Posted: 05 October 2008 at 3:10pm |
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hmmmmmmm the jbl 15"scoop seems to be off, it says it gets down to 20Hz @87db 1w1m, however it deffinatley doesn't get down that low, i know from hearing it, where am i going wrong?
with eminence kappa 15 lf input http://i228.photobucket.com/albums/ee304/sKa01/jbl15input.png output http://i228.photobucket.com/albums/ee304/sKa01/jbl15readoutspl.png |
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You're a big man, but you're in bad shape. With me it's a full time job. Now behave yourself.
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bitzo
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Joined: 20 November 2007 Location: Italy Status: Offline Points: 977 |
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Posted: 06 October 2008 at 1:33pm |
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sorry there was a typo....s2 is not 77,5 but 775.
I correct it now, thanks sks01 |
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sKs01
Old Croc
Joined: 11 April 2008 Location: sheffield Status: Offline Points: 1744 |
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Posted: 06 October 2008 at 8:28pm |
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not a problem and thanks for this its really helpful, how long does it take you to reverse engineer these figures btw, im trying to create a sim for the hog and its hurting my head somewhat, ill try again tomorrow unless someone else fancys a crack at it?
http://groups.msn.com/SpeakerBuildingpics/shoebox.msnw?action=ShowPhoto&PhotoID=93 |
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You're a big man, but you're in bad shape. With me it's a full time job. Now behave yourself.
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Deadbeat
Old Croc
Joined: 12 March 2008 Location: Singularity Status: Offline Points: 3167 |
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Posted: 06 October 2008 at 8:39pm |
PM Mykey, he's simmed it. When I create a sim for plans, I like to unfold the horn on paper or on CAD. You have to approximate the bends. |
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Away on extended leave.
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bitzo
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Joined: 20 November 2007 Location: Italy Status: Offline Points: 977 |
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Posted: 07 October 2008 at 10:04am |
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eheheheh in this days I'm doing the simulation too ;). We can post our data and discuss about that...however I don't use cad cause I'm not able in it but some loosing or encreasing some cm in the lenght don't change so much the sims.
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LjudLahger
Young Croc 
Joined: 31 July 2008 Location: Sweden Status: Offline Points: 838 |
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Posted: 04 November 2008 at 4:32pm |
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X-tro? Bass and mid?
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bitzo
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Joined: 20 November 2007 Location: Italy Status: Offline Points: 977 |
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Posted: 05 November 2008 at 12:41pm |
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do you want it? Do it! I learnt by myself hornresp, I use freeware tool. Mate, you don't need money only time and will.
cheers |
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bitzo
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Posted: 02 December 2008 at 8:25pm |
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Stipe hog scoop
s1=750 con=112.8 s2=1062 con=42 s3=1770 con=51 s4=2544 con=47 s5=5700 vrc=0 lrc=0 fr=0 tal=0 vtc=49456 atc=86 measure taken from http://www.speakerplans.com/forum/forum_posts.asp?TID=8887&PN=1 I've modeled this like a proper scoop but it's not only a scoop because the woofer is inside the orn mouth and works like a tapped horn. Edited by bitzo - 18 August 2009 at 10:54am |
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bitzo
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Posted: 03 December 2008 at 9:09am |
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Mikey Bull-X short scoop
s1=800
s2=3020
exp= 170 vrc=0lrc=0 fr=0 tal=0 vtc=110000 with optional panel A vtc=91000 with optional panels A&B vtc=71000
atc=1800
posted by Mykey http://www.speakerplans.com/forum/forum_posts.asp?TID=20926 Edited by bitzo - 18 August 2009 at 10:49am |
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bitzo wrote: