Hi, I love the impact and dynamics of horn, but to get to 40 hz they get pretty big. So I was wondering, if it is possible to put vents in a W-Horn like this
or would I lose the compression and therefore it does not function like a horn anymore.
I found a picture where it seems that idea is applied
Would certainly be nice to get the lows hornloaded through the vent. But then it would have been done decades ago, I guess, so maybe there is no such thing as free lunch😉
Regards Sebastian
or would I lose the compression and therefore it does not function like a horn anymore.
I found a picture where it seems that idea is applied
Would certainly be nice to get the lows hornloaded through the vent. But then it would have been done decades ago, I guess, so maybe there is no such thing as free lunch😉
Regards Sebastian
Sebastian,
It has been done decades ago, though the ports were put in the front of the compression chamber. Compared to the horn output, the port output with such a small chamber volume is rather anemic.
Doing it as your plan shows would be possible, but the port output won't be reinforced by the horn, since Fb would be below Fc. With the port feeding in to the horn, it may actually be out of phase and reduce output in a narrow band, you would need to model it in a program like Akaback to determine if it would be an improvement.
Art
There is a La Scala mod which is basically this idea. Possibly, it works well because the La Scala is a short and comprised horn, so anything is an improvement.
Pretty sure a web search would at least give you some ideas.
Pretty sure a web search would at least give you some ideas.
There is a La Scala mod which is basically this idea. Possibly, it works well because the La Scala is a short and comprised horn, so anything is an improvement.
Pretty sure a web search would at least give you soon ideas.
Pretty sure a web search would at least give you soon ideas.
Porting into the throat area is not the best idea (as Art already said).
A block of four vented LaScala type horns with RFC 15PBZ40 woofers.
A block of four vented LaScala type horns with RFC 15PBZ40 woofers.
Hi Sebastian
I just came across this old thread, and am wondering if not Roy from Klipsch actually has a patent doing just what you proposed! Klipsch also offers subwoofers with that principle!
Roy even uses that approach in the new Jubilee Klipsch Flagship at only 35.000$ per speaker!
I am not sure that it is a good idea!? Funny that the "old" Jubilee bass-bin has been discontinued! Well............?
Steffen
I just came across this old thread, and am wondering if not Roy from Klipsch actually has a patent doing just what you proposed! Klipsch also offers subwoofers with that principle!
KPT-1802-HLS
THE INDUSTRY'S ONLY FULLY HORN-LOADED, VENTED SUBWOOFER FOR THE GRANDEST AUDITORIUMS
Roy even uses that approach in the new Jubilee Klipsch Flagship at only 35.000$ per speaker!
I am not sure that it is a good idea!? Funny that the "old" Jubilee bass-bin has been discontinued! Well............?
Steffen
See also US290040 of James Novak (app '55, grant '59) of the Muter Co which might've then swallowed Jensen (?).
BFM's experiences report it's okay in midhorns if you keep Fb an octave under Fc and that trying to do the same with LF needs Vrc so big that "normal" fronthorns with sealed RC and lower Fc horn makes more sense. Looks like Roy went big and active and brute-forced it, but haven't seen Jube hard-data anywhere yet (and didn't read the patent).
BFM's experiences report it's okay in midhorns if you keep Fb an octave under Fc and that trying to do the same with LF needs Vrc so big that "normal" fronthorns with sealed RC and lower Fc horn makes more sense. Looks like Roy went big and active and brute-forced it, but haven't seen Jube hard-data anywhere yet (and didn't read the patent).
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