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"NEW" PLANS CV earthquake sub-horn +infra upgrade!

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kawmic View Drop Down
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Joined: 15 April 2013
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Post Options Post Options   Thanks (0) Thanks(0)   Quote kawmic Quote  Post ReplyReply Direct Link To This Post Posted: 15 April 2013 at 1:04pm
jeg har 4 stk jbl 128h 12 " basser. synes de mangler noget i følsomhed(91db).
kunne godt tænke mig bedre følsomhed, the de kun er på 100watt vedvarende.
Kunne et sådant hornsystem være godt til dem?
måske med 2 eller flere enheder i?
Venlig hilsen Michael
kawmic@gmail.com
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SvempaPrim View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote SvempaPrim Quote  Post ReplyReply Direct Link To This Post Posted: 15 April 2013 at 1:29pm
English please.
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kawmic View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote kawmic Quote  Post ReplyReply Direct Link To This Post Posted: 15 April 2013 at 1:40pm
sorry. i was writing in danish, because i saw it was a danish poster. 
ok. nevermind. here goes:

I have 4 pieces jbl 128h 12 "woofers. seems they lack something in sensitivity (91dB).

I'd like better sensitivity,because they are only 100watt.

Could such a horn system be good for them?

Maybe with 2 or more units?

Sincerely, Michael
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joahed01 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote joahed01 Quote  Post ReplyReply Direct Link To This Post Posted: 15 October 2014 at 10:13am
Hi, i have an acousto-pro P18110A (specs: VAS 423, Qts 0,54, Qes 0,57, Qms 8,7, Fs 30, Re 6,2, Sens 98dB, Le 1,6 mH, Pmax 300, sd 1288cm2). I would like to make an L48 and use your new plans but i think this speaker needs more chamber space.....you have made 79l this speaker needs about 460l cab if i do an basreflex cab (i have that but i would like to try L48SE).
Is it possible, and what size must my internal enclosor be, and can i in the case that it will work use the unused spaces in your new plan (young croc).
Best regards Jocke
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tv00 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote tv00 Quote  Post ReplyReply Direct Link To This Post Posted: 15 October 2014 at 10:31am
Hello there, sorry I didn't see all these posts until now.
If you're doing a new build I wouldn't recommend this design.

I made a smaller rearchamber to control excursion, in this case we used mouth extensions (see thread elsewhere for details).

But if you were to use these boxes without mouth extensions I would suggest making a port in front, no matter if it is the long or short version. The port and horn can be simmed in hornresp using the "combined response" function. This makes it a ported hybrid horn.

This way you get two good things, cooling & low end extension. The port shoud be tuned to work just below the horn cutoff. Best freq is found in hornresp, go for a smooth response downwards, if you get a bump in the low end make the port tunning lower, if you get a dip, make it higher.

I will suggest these mods only for people who already have the old boxes.
@joahed01: In a brief look the driver doesn't look to suited for a horn, but perhaps a ported hybrid.
If you're ever around Copenhagen you're welcome to come have a look

www.facebook.com/babysoundsystem
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Niclas Seifen View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Niclas Seifen Quote  Post ReplyReply Direct Link To This Post Posted: 30 March 2020 at 4:39pm
@tv00
the pictures you posted, arent visible anymore,
could you post them again or pm them to me?
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VECTORDJ View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote VECTORDJ Quote  Post ReplyReply Direct Link To This Post Posted: 02 April 2020 at 2:19pm
A+   Can You post photos of the install??? VECTORSONICS
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