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To good to be true? |
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Crazy Dane 
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Joined: 14 October 2010 Location: Denmark Status: Offline Points: 266 |
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 Topic: To good to be true?Posted: 06 December 2011 at 4:43pm |
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I just came across this plan: http://boyzpc.home.xs4all.nl/Bouwtekeningen/Overig/CW218%20sub.pdf 107,5dB sensitivity..!Is it just me or does that sound a little bit like whish thinking? |
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You can never use to much glue!!
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burningbush
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Joined: 25 May 2009 Location: Pictland Status: Offline Points: 3014 |
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Posted: 06 December 2011 at 5:05pm |
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It says -3dB at crossover, even still seems a little high. At what frequency is the sensitivity measured though?
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Hud 'at ye bam
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Crazy Dane
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Posted: 06 December 2011 at 5:26pm |
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That is my thought too..
They dont say where it is that sensitive.
My Cubo215 has a sensitivity of 107dB at 120hz, but i do cut them off at 112hz. So that doesnt meen anything to me :) |
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You can never use to much glue!!
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Saturnus
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Posted: 06 December 2011 at 6:02pm |
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Given the dimensions I'd estimate that sensitivity to be at 150Hz or higher. It's also evident that the sensitivity boost does not come from the V shape which will not give any boost at the rated frequency range but from misaligning the two cabs with different Q values. Don't try this at home kids. It will sound horrible.
Edited by Saturnus - 06 December 2011 at 6:07pm |
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kevinmcdonough
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Joined: 27 June 2005 Location: Glasgow Status: Offline Points: 2020 |
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Posted: 06 December 2011 at 11:28pm |
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yep, far too good to be true.
To me, this isn't a horn but essentially just a reflex with the drivers mounted backwards so they face into their ported chambers? You may get a db or two from the v loading of the two drivers but certainly nothing that will be even close to 107db in their pass range, its no where near the length of any sort of proper horn. k |
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salzburgsoundsystem
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Joined: 27 January 2011 Location: Austria Status: Offline Points: 111 |
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Posted: 14 December 2011 at 6:25pm |
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Maybe running 2.83 Volts into a parallel pair of four Ohm drivers... at 1 kHz?
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Noize-Guerilla
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Posted: 21 December 2011 at 12:24pm |
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Looks like the KS CW218 ,
http://www.djlukas-meyer.de.tl/KS-CW218.htm http://www.google.com/imgres?q=pozor+smeti&um=1&hl=de&client=safari&sa=N&rls=en&biw=1024&bih=873&tbm=isch&tbnid=jwkckFybVryYvM:&imgrefurl=http://www.tekknoost.de/forum/viewtopic.php%3Fp%3D31259&docid=fx5u3lLRCTFLIM&imgurl=http://lh5.ggpht.com/_I43ffsInwa8/Snag8aYBP8I/AAAAAAAABU8/u7RP3L_49tM/P8026857.jpg&w=1346&h=786&ei=r9DxTqGHNcjMtAbX1JUU&zoom=1&iact=rc&dur=412&sig=114229871638482036966&page=1&tbnh=123&tbnw=211&start=0&ndsp=16&ved=1t:429,r:0,s:0&tx=109&ty=23 Here, in Action: http://www.youtube.com/watch?v=3bmy2rv_ZpU&feature=related Greetings
Edited by Noize-Guerilla - 21 December 2011 at 12:34pm |
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