Pics new CNC'd back loaded horn using 4 inch drivers

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SUCCESS



Playing first time, amazing.



I was struck by the detail/accuracy and bass response.



Being small, the speakers vanish, and produce a wonderfully large sound stage.



Cymbals can be a little splashy...but overall, a great sound for sure.



Artists like Jack Johnson, Diana Krall and Angus & Julia Stone amazing...as was Eric Clapton unplugged.



The big valve amp needed careful volume adjustment, as I didn't want to blow the drivers.



Do you like my kitchen stools used angle toe-in?



Tomorrow, I'll run the mic over them.
 

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Sanding complete, and second side panel added. Dampening to rear of chamber.

Driver cut-out to do, plus oil with a Teak proof tint added.

Heavy unit...looking forward to listening to them.

Thinking of using the left over CNC'd wood to make a concrete version of the horn.

Andrew
 

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That looks really awesome. And I totally enjoy the music you ran thru this speaker.

Thanks.

Finished sanding tonight....one cab started with dark Bees Wax. The finish is very soft to the touch, smooth.

Driver cut outs tomorrow, then fit cable, terminals, drivers....done.

A nice high end speaker, yet compact. Kits available.
 

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Very nice.

Good to see someone rounding the ports off on corners to get better transmission.

I see too many projects with ports with right angled square corners. They used to use right angled corners in trenches during the first world war to stop blasts travelling the full length.
The right angled corner just returns the blast the way it came.
An externally hosted image should be here but it was not working when we last tested it.
 
Very pretty indeed. :)

I see too many projects with ports with right angled square corners. They used to use right angled corners in trenches during the first world war to stop blasts travelling the full length.
The right angled corner just returns the blast the way it came.

I fear you've somewhat missed the point. A smooth pathway in a back horn promotes maximum efficiency over its entire operating bandwidth, primarily affecting the shorter frequencies at the top end of that range. However, there are equally valid alternatives, one of which is to design the horn to include and use sharp bends, edges and CSA shifts at specific points in the expansion path as a functional part of the low-pass filter. So if you see them in a back horn, it does not necessarily mean it is a poor design. It might actually be the reverse.
 
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Thanks.

Finished sanding tonight....one cab started with dark Bees Wax. The finish is very soft to the touch, smooth.

Driver cut outs tomorrow, then fit cable, terminals, drivers....done.

A nice high end speaker, yet compact. Kits available.

Point us to the kits, pronto! :)

btw, what's the -3db like for the bass if placed about a foot from a back wall?

thanks!
 
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