best choice for a 12" horn plans |
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_Natty_
Young Croc Joined: 01 April 2007 Status: Offline Points: 664 |
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Posted: 11 November 2016 at 11:51am |
Im looking for a decent horn for a 12"
ideal cuts are from 200 to 1000/1200kHz to put over a es18bph kicks. the speaker should be b&c 12hpl76 http://www.bcspeakers.com/products/lf-driver/archive/12hpl76 or the new one b&c 12ndl76 http://www.bcspeakers.com/products/lf-driver/12-0/8/12ndl76 depends from what ill find ready in stock. What ive found around are: mt121 mt122 fx12 mt130 mt-121-tda Altec m17 jbl4512 f12cwh smt212 celestion expo upper i will go for some 2" and some 1" but in different boxes... i can set delay and different sloope for the xovers. does any one tryed yet one ofthe above combination? or some one know wich one are more suitable for my needs? cheers
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VECTORDJ
Young Croc Joined: 11 June 2006 Location: United States Status: Offline Points: 515 |
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Double stacked M17 or 4512 will rock. The horn shape will add 3-5 dB compared to a DR box. VECTORSONICS
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bee
Old Croc Joined: 14 June 2011 Location: Middlesex Status: Offline Points: 4553 |
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your be lucky to get the es18 up to 200hz, I found they start to honk from around 140hz like most 18" bph designs. You may be better using a 15" bph if you need to hit 200hz.
That said with a bit of eq the mt121 will play from 150hz to 900hz the mt130 from about 180hz to 1k smt212 from about 180hz to1.2k mt121 from 160hz to 900hz mt 121-tda from 160hz to 900hz
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https://www.elements-audio.com
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Aman Gebru
Registered User Joined: 01 February 2014 Location: Delhi Status: Offline Points: 350 |
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If you don't mind running 4 way another possibility is, Altec 816A from 140Hz to 250Hz, then MT121 from 250Hz to 1.2kHz, and a 1.5" comp from 1.2kHz up.
The compromise will be around 1kHz where the MT121 will start to suffer from a narrowing of dispersion, but not many will notice or care around this frequency. |
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_Natty_
Young Croc Joined: 01 April 2007 Status: Offline Points: 664 |
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thanks for all the replies... many point of view as I expected :) my sound is allready 5way active. so the goal is to found a decent 12" horn plan that fit the 12ndl76 b&c. around 150/200hz to 800/1,2khz. The Xpoint for ES could be lower, i will make some test asap, i need even to going forward in this project becuase the system now is far from me!
that's the most interesting thing! what im looking for is just the 12" horn from al plan to combine with my 2" and 1". I will put just 2 2" and 2 1" that are enough, the others cabs will be with fake flares... i used some times to put 4 12" and even with 3 2" the 2" are too much! a second goal it to have all the 12" on the same horizzontal line. I cant go upper because otherwise imo the driver will be too far from the ground, and ive no way to "direction" them on the ground. A third goal is to have a shape that can avoid "comb filter" so i'll go for trapezoidal shape. For that reason i'd like to understand if the internal volume of a sealed horn is almost influent like for the normal sealed boxes... next step will be founding the right value for winisd and making some simulation i guess! |
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_Natty_
Young Croc Joined: 01 April 2007 Status: Offline Points: 664 |
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first simulations -please check my inputs if all are corrects!- done with 12hpl76 b&c
mt121 spl chart: mt 121 tda version inputs: spl: |
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mobiele eenheid
Old Croc Joined: 15 August 2004 Location: Netherlands Status: Offline Points: 1568 |
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@Natty: You should use directivity, that's easiest for TDA's version and sim in 4,0 pi as well.
Johan |
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bee
Old Croc Joined: 14 June 2011 Location: Middlesex Status: Offline Points: 4553 |
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as above, ill check the sims I have in HR as this plot looks wrong.
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https://www.elements-audio.com
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bee
Old Croc Joined: 14 June 2011 Location: Middlesex Status: Offline Points: 4553 |
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MT121
s1=360.8
s2=872.2 con=25.3 s3=1944 con=21 vrc=17.6 lrc=14.8 fr=0 tal=0 atc=1108 vtc=615.75 |
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https://www.elements-audio.com
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bee
Old Croc Joined: 14 June 2011 Location: Middlesex Status: Offline Points: 4553 |
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MT121 TDA version
s1=360.8
s2=1944 con=47.8 vrc=17.6 lrc=14.8 fr=0 tal=0 atc=1108 vtc=615.75 |
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https://www.elements-audio.com
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SouthwestCNC
Young Croc Joined: 27 November 2015 Status: Offline Points: 830 |
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removed
Edited by SouthwestCNC - 16 November 2016 at 6:05pm |
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SouthwestCNC
Young Croc Joined: 27 November 2015 Status: Offline Points: 830 |
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removed
Edited by SouthwestCNC - 16 November 2016 at 6:06pm |
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