Mid-bass horn (easy to build)

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arcgotic

Member
Joined 2004
demerzzel.blogspot.com/
I just bought 2pcs of 12pe32. I want to cross them lower than in John's 100hz horn, so i did some Hornresp sim.
Because of its length, 123cm without back chamber, i will bend it.
An externally hosted image should be here but it was not working when we last tested it.

Should i do a smooth curved bend, as in for example Imperial horn, or a 90degrees sharp bend?

Thanks!
https://postimg.org/image/86dg11nfd/
 
carpenter

carpenter

Member
Joined 2002
inlowsound.com
arcgotic said:
I just bought 2pcs of 12pe32. I want to cross them lower than in John's 100hz horn, so i did some Hornresp sim.
Because of its length, 123cm without back chamber, i will bend it.
An externally hosted image should be here but it was not working when we last tested it.

Should i do a smooth curved bend, as in for example Imperial horn, or a 90degrees sharp bend?

Thanks!
https://postimg.org/image/86dg11nfd/
Click to expand...

Smooth is preferable if you can swing it...
 
GM

GM

Member
Joined 2003
arcgotic said:
Should i do a smooth curved bend, as in for example Imperial horn, or a 90degrees sharp bend?
Click to expand...

Depends on how high in frequency [Fh] you want to use the horn, i.e. the 'sharper' and/or longer before the bend, the lower its usable [Fh] and the more reflections back to the throat [St], which shows up as [increased] response 'ripple'. In short, for the widest, smoothest practical gain bandwidth [BW] use the Nautilus shell as a guide same as W.E. did: https://www.google.com/search?q=w.e...ved=0ahUKEwjWl9WSy8vPAhWGTCYKHTE2A20Q_AUIBigB

GM

edit: Harry Olson's BLH shows how to do it with just board panels: https://www.google.com/patents/US2224919
 
Last edited:
J

jayam000

Member
Joined 2009
arcgotic said:
I just bought 2pcs of 12pe32. I want to cross them lower than in John's 100hz horn, so i did some Hornresp sim.
Because of its length, 123cm without back chamber, i will bend it.
An externally hosted image should be here but it was not working when we last tested it.

Should i do a smooth curved bend, as in for example Imperial horn, or a 90degrees sharp bend?

Thanks!
https://postimg.org/image/86dg11nfd/
Click to expand...

how you calculated Vtc 900?
 
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