I’m looking to set up a home theatre and home party system. I Already have a swarm of 12” servo subs and looking to cover the 70-80hz to 300hz range with a horn loaded midbass.
I’ve been admiring the William Cowan Horn Sub Jr which is designed as a corner loaded sub but it occurred to me that this would make a nice free standing stereo midbass horn due to the clean wide bandwidth.
http://www.cowanaudio.com/
I Have not plugged the numbers into horn resp yet but I imagine a narrower single 10” or 12” version with a midrange horn and high frequency horn on top would make for a nice PA style speaker similar to the funktion one Res units.
I am a big fan of the FLH sound for midbass for electronic music, and I’m putting this idea out there for critique.
I prefer FLH over tapped horn as I think it fits better with the design I have in mind with respect to bandwidth.
Looking forward to some feedback, cheers
I’ve been admiring the William Cowan Horn Sub Jr which is designed as a corner loaded sub but it occurred to me that this would make a nice free standing stereo midbass horn due to the clean wide bandwidth.
http://www.cowanaudio.com/
I Have not plugged the numbers into horn resp yet but I imagine a narrower single 10” or 12” version with a midrange horn and high frequency horn on top would make for a nice PA style speaker similar to the funktion one Res units.
I am a big fan of the FLH sound for midbass for electronic music, and I’m putting this idea out there for critique.
I prefer FLH over tapped horn as I think it fits better with the design I have in mind with respect to bandwidth.
Looking forward to some feedback, cheers
As built that horn had nice and flat response from below 60Hz to above 300Hz, half space. I would build it as a dual 10", standard width. The Hornresponse parameters presented should help you select a suitable driver. The drivers I used were 32Hz Fs, 0.39 Qt and 63L VAS. In your application Fs in the 40's would likely work fine.
Hi William, so glad you chimed in. It occurred to me that directivity may be very narrow higher up. Not sure if this can be accurately predicted in hornreap? Thank you
The only problem is the nice flat response in the 60Hz to above 300Hz range will have a a 1/4 wave cancellation dip somewhere in the middle of the response due to the mouth distance to the back wall.
That problem could be mitigated by putting the mouth next to the wall, but then the directional upper response may not be pointing where you want it.
That problem could be mitigated by putting the mouth next to the wall, but then the directional upper response may not be pointing where you want it.
Hello Art, I guess we can’t model this in hornresp because it doesn’t take the folding into account?
And here is the modelling for the driver:
And using 2.0 x Pi
Not quite as smooth as the Etone driver but not sure if it’s worth messing with the design or changing to a different driver to try and improve.
Looks pretty good to me!
And using 2.0 x Pi
Not quite as smooth as the Etone driver but not sure if it’s worth messing with the design or changing to a different driver to try and improve.
Looks pretty good to me!
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Note that S5 is trying to take into account the interaction with the corner and will be smaller if the speaker is firing into the room. Your drive voltage is a bit high too.
Also you are right about the directivity at the top end of the passband. Directivity control was never a concern in this design, it is a high output subwoofer.
Also you are right about the directivity at the top end of the passband. Directivity control was never a concern in this design, it is a high output subwoofer.
Thanks William, I will adjust S5; What would you recommend S5 if the horns are placed in corners firing outwards? The actual mouth area or should I still take the corners into account?
I have started simulating a conical midrange horn loaded with a 10" B&C driver for a crossover of around 200hz and 800hz to a waveguide above.
I would appreciate feedback, thanks
Edit: 200hz might be optimistic for directivity match between bass and mid horn unless I increase the size of the midhorn?
I think I should also find drivers with lower Fs for the bass horn and a dedicated midrange driver for the midrange horn.
I have started simulating a conical midrange horn loaded with a 10" B&C driver for a crossover of around 200hz and 800hz to a waveguide above.
I would appreciate feedback, thanks
Edit: 200hz might be optimistic for directivity match between bass and mid horn unless I increase the size of the midhorn?
I think I should also find drivers with lower Fs for the bass horn and a dedicated midrange driver for the midrange horn.
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Hornresp assumes a horn mouth flush with boundaries, which is not generally a real world situation.
The folding of the horn is not the problem I was writing about, it was Speaker Boundary Interference Response (SBIR).
At 1/4 of a wavelength distance from the horn mouth to the wall there will be a cancellation at that frequency.
Here is a web page with a SBIR calculator:
http://tripp.com.au/sbir.htm