Help designing a Rear loaded full range horn for KEF sp1014

Naudio

Member
2007-09-21 12:15 am
hi i am starting a new project

the plan is to build two fair sized full range rear loaded horns, using the following drive units,

[IMGDEAD]http://b.imagehost.org/0976/B9e8_T_CGk_KGrHqJ_l8Ey_jC_VjTBM5-Mi_SbQ_12.jpg[/IMGDEAD]


[IMGDEAD]http://d.imagehost.org/0774/B200_SP1014.gif[/IMGDEAD]

i have previous experiance of designing a tapped horn for a eminence alpha 12 using a nice little program called horn responce.

i plan to crossover the drivers at about 3500hz to a yet to be purchaced tweeter

i am looking to design 2 speakers that go loud and sound great whilst covering40 (or35)hz to 20000hz

what i am looking for is some kinda DIAGRAM or a rear loaded horn and how each part relates to the IMPUT prahimiters in horn responce because im feeling abit stuck atm, maths isnt my strong point


im looking for a relitively simplistic design like one of the above

[IMGDEAD]http://b.imagehost.org/0543/rougth_horn.jpg[/IMGDEAD]

the wifi in this cafe is about to go down so i have to leave it as it is, any help with this and its feesabilaty would be greatly appreaciated, thanks
 
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A tapered quarter wave tube would suit this driver ?
 

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Naudio

Member
2007-09-21 12:15 am
why would it not be suited, could i not design the horn in such a way that the driver would be?

i thought these drivers would work well even if the compression ratio isnt to high

i took these drivers out of transmition line speakers and i realy had my mind set on making horns for em

any more opinions
 

Naudio

Member
2007-09-21 12:15 am
Ok so as it may be possible..

i would like to have a play and see what i can come up with

is there anywhere i can get a diagram of a basic rear loaded horn, with each bit marked to correlate to the input fields in horn response, so i can see what input field in the program = what part of the horn design. this would be greatly appreciated for me and anyone else looking to design horns, thanks,

i am expecting they will turn out fairly large this is not an issue was thinking kinda 1.2m high should give a horn path of 1/4wavelength of 40hz
 
i am expecting they will turn out fairly large this is not an issue was thinking kinda 1.2m high should give a horn path of 1/4wavelength of 40hz

With a mass corner = ~2*25/0.57 = ~88 Hz based on published specs, you're only loading a little over 1/2 octave, so probably better overall to use a double bass reflex (DBR) alignment and save yourself all the extra design/woodworking effort.

GM