tuba 36 and low fs driver

[wingman]

Hi
Why can´t i use a low fs driver in a horn ?
(i´m told i can´t)

i have a ravemaster Rvxt1524
http://www.speakertrade.com/site/pro...oduct=Rvxt1524

it is alot like the Delta 15lf http://www.loudspeakersplus.com/html/delta15lf.html

Except m driver have a lower fs.

any how i would like to make a horn if possibel.
but i don´t know much about calc. a horn.

[mike.e]

Yes,you can because the rear chamber will bump the resonance up,and the horn will drop it down due to the air mass loading the cone.

Take the 'labhorn' for example - www.prosoundweb.com

Email me for horn design info.

[Rademakers]

Why can´t i use a low fs driver in a horn ?

You can use a low Fs driver in a horn.

One of the old rules of thumb is that you need a driver with a high EBP. EBP = fs/Qts, so a low fs will result in a lower EBP, could be the reason why you got told not to use a low fs driver. It however stays only a rule of thumb since the're also designs these days (with low fs drivers) that perform very well.

Mvg Johan

[Lusifar]

The design of the particular horn you're mentioning require the T/S specified by Bill Fitzmaurice in the plans...
You could alter any parameter, but it may require a total redesign of rearchamber, flarerate and so on..

As you know, the design is a tuned high impedance bandpass and I trust Bill's recommendations regarding drivers are correct..

Rajeev and other users on his forum has hands on experience with this design, and will gladly help you recommending suitable drivers and other tips..

Forum is located at : http://audioroundtable.com/BillFitzmaurice/



/Hornblower