LF18X401 in scoop? |
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moyojojo
New Member Joined: 25 May 2011 Status: Offline Points: 8 |
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Posted: 05 January 2022 at 6:14pm |
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Hello,
Did anyone tried to put this driver in scoop? Thanks for reply.
Edited by moyojojo - 05 January 2022 at 6:14pm |
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levyte357-
Old Croc Joined: 27 July 2012 Location: UK, South East Status: Offline Points: 8128 |
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As suggested previously, I would suggest you sell that driver, if intending to use Scoops. This is a free plan, from the very generous "Mykey Wattco", that will work with many of the best Scoop drivers. https://forum.speakerplans.com/fane-scaled-up_topic74640_page1.html This Mod will increase the number of drivers that will sound good, in this cab. https://forum.speakerplans.com/fane-scaled-up_topic74640_page6.html "So by taking 450 and reducing it to 425mm will give you a bigger chamber and throat without messing with anything else. This would give you the sound that most scoop lovers are looking for these days 70 litres minus driver 18'' = roughly 11 litres would leave 59 litres and a throat size of 849 Chamber and throat are close to Wattco scoop territory" Edited by levyte357- - 06 January 2022 at 9:55am |
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Global Depopulation - Alive and Killing.
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bob4
Old Croc Joined: 29 February 2004 Location: Finland/Germany Status: Offline Points: 1842 |
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Wow, an unprecedented moment in the scoop section! In proper Christmas spirit, Lev is making it snow for everyone! Thank you for the link Lev, interesting reading Happy New Year!
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levyte357-
Old Croc Joined: 27 July 2012 Location: UK, South East Status: Offline Points: 8128 |
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Eh, stop that.. !!!
Just doing, what I tell everyone to do, when someone asks for help.. Tell them to search Scoop Forum, for all the treasure that is here !! |
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Global Depopulation - Alive and Killing.
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moyojojo
New Member Joined: 25 May 2011 Status: Offline Points: 8 |
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Ha xd More explanation here: https://forum.speakerplans.com/topic106748_post1057061.html#1057061 So, maybe another question - what cabinet should I use for this RCF? |
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smitske96
Young Croc Joined: 16 February 2016 Location: The Netherlands Status: Offline Points: 1085 |
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@levytout
of curiousity.
Why would that small descrease shift the 'boundary' for the chamber that much? |
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levyte357-
Old Croc Joined: 27 July 2012 Location: UK, South East Status: Offline Points: 8128 |
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Was Mykey who originally stated this. But would "imagine", reducing the rear baffle shifts the throat, and includes additional bit of chamber volume.
Edited by levyte357- - 07 January 2022 at 2:19pm |
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levyte357-
Old Croc Joined: 27 July 2012 Location: UK, South East Status: Offline Points: 8128 |
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Do you not get the "strong hints", sir !? For Dub Reggae, Scoops are one of the "optimal" cabs. You have a great free design here. Look for drivers, with BL, Vas, Qts, Qes similar to Void V18-1000,PD1850 MK2, PD1852, to use in this cab.
B&C 18TBX100 will also work, but won't be as loud, or as sturdy, as the above. Edited by levyte357- - 07 January 2022 at 2:26pm |
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Global Depopulation - Alive and Killing.
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jammin75
Old Croc Joined: 08 July 2012 Location: west midlands Status: Offline Points: 2375 |
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sorted
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feel the vibes !!! "Who Feels it Knows it" Strong like Lion
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levyte357-
Old Croc Joined: 27 July 2012 Location: UK, South East Status: Offline Points: 8128 |
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You naughty man !!! |
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Global Depopulation - Alive and Killing.
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jammin75
Old Croc Joined: 08 July 2012 Location: west midlands Status: Offline Points: 2375 |
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scoop owners drink wray and nephew reflex owners wud be on the captain morgan !!
Edited by jammin75 - 07 January 2022 at 6:15pm |
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feel the vibes !!! "Who Feels it Knows it" Strong like Lion
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toastyghost
The 10,000 Points Club Joined: 09 January 2007 Location: Manchester Status: Offline Points: 10920 |
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You're only decreasing the area through the bend by 0.02 litres, but there will be an increase in the compression ratio as this is in effect the throat for the horn. Making a change to the coupling chamber adjusts the roll-off in the upper region of the horn's output, which will affect the summation (or cancellation) with the pressure directly radiating from the front of the driver. Often that's modelled as a series compliance, when in reality it's more of a transmission line which is affected by the driver's placement along the initial chamber. Anyway, a key thing for 'scoops' is that the horn's geometry sizing parameters are pretty much uncoupled from the choice of driver, for an exponential flare profile. The primary factors are simply the desired cut-off frequency, and the amount of SPL increase desired over a simple direct radiator in an infinite baffle. Contrary to popular opinion here, a scoop or rear-loaded horn is pretty well understood, acoustically. Part of the disconnect between sims and ‘perceived reality’ seems to be twofold - people rarely build what they simulate, and even more rarely qualify/refine the model with measurements of the box that's been built. Anyway, that aside, this is a great resource in fairly plain English for this type of box: http://www.quarter-wave.com/Horns/Horn_Theory.html Try to your way through them in turn, even if you're impatient, like me |
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