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Alternative driver for X-tro...? |
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mobiele eenheid 
Old Croc 
Joined: 15 August 2004 Location: Netherlands Status: Offline Points: 1563 |
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 Posted: 30 November 2005 at 2:48pm |
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A sub almost always radiates in 2 pi, but a top radiates more likely in 4 pi. The lowsection of the Xtro consists of 2 BPH. So the simulation of a single BPH in 2 pi will be close to the actual performance of the Xtro's lowsection. |
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Mircea Bartic
Old Croc
Joined: 18 February 2005 Location: Romania Status: Offline Points: 2589 |
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Posted: 30 November 2005 at 3:31pm |
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the thing is that I consider that a sub should still couple with the
ground within 1 wavelenght of the frequency band, so I modeled the
x-tro in 1 pi because even at 200Hz the top is still close enough to
the ground to benefit from half space conditions
1pi= 2 midbass horns in halfspace= 1 x-tro positioned above 2 punishers I maybe wrong  , but tests until now seem to confirm my teory |
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general manager & head designer at nexus-acoustics research
http://www.facebook.com/nexus.acoustics.research Ex Nexus_3 |
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PoteirosCorp
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Joined: 31 August 2004 Status: Offline Points: 178 |
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Posted: 30 November 2005 at 9:54pm |
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Funny thing, kappa and sm115 give me the almost the same results
The sad par is te 3mm excursion at 90hz for the kappas (and the Xmax is 1.6) Here's the pic for the kappa  For the beyma is "the same", it just moves 2hz from bottom end and 3hz for upper end. Cheers |
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mobiele eenheid
Old Croc
Joined: 15 August 2004 Location: Netherlands Status: Offline Points: 1563 |
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Posted: 01 December 2005 at 8:05am |
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What tests?
At 2,83V/1mtr but how about at full power? |
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Mircea Bartic
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Joined: 18 February 2005 Location: Romania Status: Offline Points: 2589 |
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Posted: 01 December 2005 at 1:21pm |
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tests made with a horn loaded cabinet (not xtro)
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general manager & head designer at nexus-acoustics research
http://www.facebook.com/nexus.acoustics.research Ex Nexus_3 |
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mobiele eenheid
Old Croc
Joined: 15 August 2004 Location: Netherlands Status: Offline Points: 1563 |
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Posted: 01 December 2005 at 3:14pm |
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I mean; What did those test involve (what was the setup, conditions, etc.) that you can say they confirm your theory? |
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Mircea Bartic
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Posted: 01 December 2005 at 4:03pm |
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there was a hd15 type bass suspended in air
I ve discovered that you don't have to put the sub right on the ground to gain the extra dB (I did not have a measurement system at that time so No actual numbers.) I did the test after I saw that many of the sound companies lift their subs on tables during the concert  |
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general manager & head designer at nexus-acoustics research
http://www.facebook.com/nexus.acoustics.research Ex Nexus_3 |
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Rengade Project
Young Croc 
Joined: 12 December 2004 Location: United States Status: Offline Points: 601 |
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Posted: 01 December 2005 at 11:30pm |
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Do any of the McCauley 15" have suitable parameters for the famed Xtro.
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MUSIC SWEET,www.myspace.com/renegadeproject
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Mark James
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Joined: 15 January 2006 Location: rig side Status: Offline Points: 5306 |
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Posted: 26 February 2006 at 4:09pm |
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whats the prices individualy then? Edited by coner - 26 February 2006 at 8:37pm |
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Jay Lawless
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Posted: 26 February 2006 at 5:07pm |
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@Nexus
i've only used hornresp to try out some bass horn ideas, how do you compare two designs like that? |
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Previously known as NeverWinter
Background: Automotive, Live and Home Custom Design. mid/high level based design and feild experience. Bass specialist |
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Mike Severloh
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Posted: 27 April 2006 at 9:38am |
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Hi all ! For a couple of years now my drumfills (drum monitor loudspeakers) are 15inch mids from 100-1000Hz. So I recon the speakers tested suite the xtro, too. Good results were achieved by using the old RCF L15P801 in Monacor/Harmonic Design horns 22x22x15", the older JBL 2220H and the very old JBL2220A, in PublicAudio- horns sized 17x17x11".
Next will be B&C 15PLB76 (short excursion, ferrite), and 15NDL76, in the larger horns. The short ones will stay horn monitors for good, but AJHorn 5 suggests the JBL speakers near perfect in the larger ones as well. I also consider B&C 15NW76, BMS 15S420, 15P200, 15N620 and 15N820 very interesting for this low/midrange use. The SAMMI SR15A380 should be fine, too. Maybe someone expirienced the Bxx in horns like the xtro already, pls let us know. @Rengade Project: I did not have the chance to test McCauley 15" yet.
Cheers.
Mike Severloh. |
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Mike Severloh
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Posted: 27 April 2006 at 9:47am |
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Hi again, I forgot the BMS 15S320, the older Solton CRAAFT 15XR600 (very lightweight moving parts), and the ancient workhorses JBL D130, and RCF L17P/64 AF(used successfully live in the PublicAudio horns).
Mike. |
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maybe wrong 
, but tests until now seem to confirm my teory 
