|
Audio Asylum Thread Printer Get a view of an entire thread on one page |
For Sale Ads |
40.138.166.12
In Reply to: RE: What the world needs is a good 10-12" LF driver for horns !! posted by Rafaro on January 31, 2016 at 12:41:55
" What I and the world needs is a good 10-12" LF driver designed for horns."
Is too vague to approach scientifically. Even if dealing with a "perfect horn", the issue is one needs to know the low and high cutoff at a minimum and realistically some other data too before one can figure out what the ideal driver for that horn looks like.
If you want to find the ideal driver for a given horn and bandwidth or the ideal horn parameters for a given driver and bandwidth, study this paper.
http://users.ece.gatech.edu/mleach/papers/HornPaper/HornPaper.pdf
Then, since what people usually build are horns that are not ideal, then model what your considering in Akabak or horn resp which appears to be good. With akabak one can model nearly anything one can dream of as parsed into something like a pspice like model and it's easy to change the driver or horn values.
Essentially all of the Synergy horn and Tapped horn products at work were designed using it and it's free!
Best,
Tom Danley
Follow Ups:
Hello Tom and groupThe design is a sub bass horn of 1/4 wavelength (WL) at 17 Hzs but in reality I am interested in PA live sound setting and maximal SPL at 35 Hzs. By using a horn of 1/4 WL at 17 Hzs response should increase about 4-5 dB at 35 Hzs because at that freq and above the horn will be operating as a 1/2 WL horn. Will keep mouth sized to Perimeter=1/4 of a 35Hz WL not to 17 Hzs. This will limit fundamental to about same level as 2nd and 3rd harmonic at 35 Hz for a very SOLID 35. This truncated 1/2 WL horn idea came from analysing TUBA sound spectrums. An upper freq response of 100 Hzs or more is sufficent
To keep cab size reasonable will use a 10" driver. Therefore need a 10" driver with high BL, EBP (over 130) and the most Xmax. Fs should be around 25-30 Hzs if used to reach 17Hz but as really just want response for PA use at 35 Hzs drivers with Fs about 45 will give a better power response at 35 Hz. Any suggestions appreciated.
Modeling this design in the long past showed a maximal response needed an Xmax of about 30mm. Off the top of my head horn length was 192", with a doubling rate of 42", Throat was 19 sq ". Mouth size could be adjusted up to 8 feet wide since the outer panels are hinged but will keep mouth Perimeter= 1/4 of a 35Hz WL
Hope the details help
Rafaro
Edits: 02/18/16 06/09/16
Try car audio woofers.This 10" has allegedly an Xmax of 25mm or more (Xdamage 4" p-p), Fs is 43Hz and costs £400 in the UK.
Edits: 02/06/16 02/06/16
Post a Followup:
FAQ |
Post a Message! |
Forgot Password? |
|
||||||||||||||
|
This post is made possible by the generous support of people like you and our sponsors: