xtro style single kick bin...advice...?

Hi all,

I am in the process of making 4 single kick bins based on the xtro 15" horn, something like an fsv15 that I found here on the forum, to go on top of my 4 punishers and under my midtop cabs(phase pluged 8" fiberglass horn + 1" loaded with 8pe21 and de500) that i finished a month ago. I was about to build the xtro as it is but I really have a transportation issue. I know that the xtro is quite a compact cab for what it is but there's no much space left for it. I can just about fit the puns, midtops and my amprack on my friends mini-van so splitting the xtro into single sections is the ideal solution for me so that they can easily fit in another car or so.

I have made two designs and the plots seem good. Though I don't really get wich one is right. Do I measure the end of the throat and s1 parallel to the baffle and slowly bend the horn till the horn's mouth like in plan B or I just take a vertical measurment and an immediate bend from 45 to 0 like plan A?????

Also would such a design sound ok up to 330hz or do I completely miss the xtro straight horn advantages by having a 45 degree refraction???

Here are the plans and plot.


plan A


plan B


black=A, grey=B

thanks in advance guys
any advice appreciated

Plan A is right.. for the throat dimensions you have to take the smallest area between the driver and the start of the horn expansion, which in this case is clearly the vertical measurement down from the end of the chamber panel/ start of flare.

In your second plan, if you look at where you have taken the 14cm measurement, the  actual area would again be calculated at the most constricted point... so again measured vertically down at the beginning of the flare, giving a much smaller throat area.

Thanks for the input guys.
 
Jethrocker , that's what I thought also about plan A being right. For plan B input parms I kept s1 the same and just decreased Vtc , but as you say that would be quite wrong. I should have kept Vtc the same and change s1 to a vertical measurment something like 10x47=470 instead of 14x47=658 and horn lenght should be something around 46 instead of 49. Though that would give quite a different responce.
 
Here are the input parameters.


for plan A


for plan B as it is actually on the plan with the throat chamber ending at the 14cm marking parrallel to the baffle and not vertical

and here are the params and spl responce for plan B after what Jethrock suggested.

What driver are you considering for this? The same as the 15 in the Xtro?

Also watching this thread with interest. Would like to know how it turns out in real testing as would definately like some over some punishers if they perform well 

Keep us posted!