P. Audio C18-650el in PD1850 horn |
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streetsounds
Registered User Joined: 12 July 2008 Location: Santa Rita Status: Offline Points: 301 |
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BISAG - ASA? where is this place Pards!
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Bass matters...
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Silas ))))))
Young Croc Joined: 10 January 2008 Location: SUFFOLK Status: Offline Points: 1003 |
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right well i have them loaded in my 186's and they sound good. Not as lovely and drawing as the pd's but they dont half move some air.
Well chufffed
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heinrich
Registered User Joined: 21 February 2007 Location: Calindagan Status: Offline Points: 280 |
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BISAG-ASA............alaska!
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.....power is nothing without control....
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tv00
Old Croc Joined: 10 August 2009 Location: Denmark Status: Offline Points: 1886 |
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whow the specs for this driver changed a lot! now its 22,76 BL & claims 1200W rms aes, but still same poor xmax
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www.facebook.com/babysoundsystem
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Andy Kos
Old Croc Joined: 15 May 2007 Location: Southampton Status: Offline Points: 3035 |
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The Xmax on the C18-650EL is a little low...
BUT P-Audio use the 'true' mathematical calculation for Xmax: ie Voice Coil Winding Height - Gap Depth _______________________________ 2 25.5 - 15 _______ 2 which gives you 5.25 mm. Another popular 18" driver has Voice Coil Height of 22, magnet gap depth of 11mm, which gives a calculated Xmax of 5.5mm, yet it's published specs are 8mm Xmax. With a strong magnet, the field will extend outside the gap, so many manufacturers use Klippel measurements to determine at what point the magnet field no longer provides linear response, which in some cases can be 2 or 3 mm bigger than the calculated Xmax. Potentially, the P-Audio could be used beyond 5mm excursion, ultimately the limiting number would be what most manufacturers would call Xlim (or Xdamage) which is the point at which excursion can cause mechanical damage due to the voice coil hitting the back plate or other similar mechanical limit. Unfortunately very few manufacturers publish this info, so it's hard to know. One thing is for sure, you cant just look at the Xmax quoted by different manufacturers and compare it directly, as there are different calculations used which can cause variations of as much as 50% for what should be the same number if they stuck to the true mathematical calculation. Ideally, everyone should publish calculated Xmax, which is mathematical, and then measured Xmax deduced by Klippel Analysis or other similar method, and stick to a standard measurement method. To some extent, Xmax is becoming misquoted in order to make drivers seem better Edited by Andy Kos - 17 November 2014 at 7:11am |
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just a guy with a warehouse and a few speakers... www.bluearan.co.uk
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SMP
Young Croc Joined: 16 March 2013 Location: East London Status: Offline Points: 1226 |
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??? Xmax = the linear region of cone movement it is not controlled by the magnet either but by the output stage of an amplifier jeez basic stuff not very well understood eh? we have some P-Audio we are field trialing in enclosures designed for 1850's seem to work quite well 2 single 18 units do very nice job for a 300 percap venue we will be ordering 16 drivers as they seem to do the job best thing is suck it n see I guess |
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Andy Kos
Old Croc Joined: 15 May 2007 Location: Southampton Status: Offline Points: 3035 |
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Just curious - Which driver is it you are using? |
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just a guy with a warehouse and a few speakers... www.bluearan.co.uk
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SMP
Young Croc Joined: 16 March 2013 Location: East London Status: Offline Points: 1226 |
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right now cannot recall but you have sent us 4 so far it is an 18 (takes a kwik look at an empty Carton) "E18-600"
seem to be fairly good we were looking for a kwik load to deal with an urgent need & you are kwik of the mark for shipping. I would like to try some others too but as yet had no time to invest in further research. but all in all pretty good for a cheap driver. I am sure there are others worth trying when it gets a bit slack after new year I will have the time just not now. I am all ears to any suggestions you may have as it is one of your product lines. so feel free to make suggestions you may have |
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Mircea Bartic
Old Croc Joined: 18 February 2005 Location: Romania Status: Offline Points: 2581 |
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C18-650EL has an X-lim of 22mm / direction
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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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Mark James
Old Croc Joined: 15 January 2006 Location: rig side Status: Offline Points: 5309 |
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is that the mk1? i thought it was more like 4mm lol personaly id only use these in the 186 horn i will be reporting back in a couple of weeks on how they went at an actual event hopefuly well because iv nearly got 8 of the things lol
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me so horny me love you long throw
horn loaded for her pleasure |
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Mircea Bartic
Old Croc Joined: 18 February 2005 Location: Romania Status: Offline Points: 2581 |
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yes, the MK1
there were several 1850 horn built in Romania using this woofer. Most are still working today. This is still one of my favorite woofers of all time. Perfect overall combination of Tonality and performance Edited by Mircea Bartic - 27 April 2016 at 10:09am |
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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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Mark James
Old Croc Joined: 15 January 2006 Location: rig side Status: Offline Points: 5309 |
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wow if they survive the 1850 then il guess the 186 is a safe bet i hope
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me so horny me love you long throw
horn loaded for her pleasure |
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