Hey guysWell, I tried that tiny 0.7L rear chamber today, and its even better now!
![](http://members.wasp.net.au/~macky888/HORNS/NEW/BACKYARD/EXCELLENT.gif)
That 300-750Hz valley is now not not so deep, and also the bottom end now has a nice steep rolloff just like the top end.
I did some offaxis measurements as well, and its remarkably smooth in most off axis positions too.
Sure was a "squeeze" to get the back volume 0.7L, used quite a few blocks to take up room around the driver.
![](http://members.wasp.net.au/~macky888/HORNS/NEW/BACKYARD/Jam102.jpg)
![](http://members.wasp.net.au/~macky888/HORNS/NEW/BACKYARD/Jam103.jpg)
Above two show the rear chamber
![](http://members.wasp.net.au/~macky888/HORNS/NEW/BACKYARD/Jam105.jpg)
![](http://members.wasp.net.au/~macky888/HORNS/NEW/BACKYARD/Jam104.jpg)
Perfect fit!
Am very happy with the horn. Thanks for the nice comments and suggestions Bill and Wayne.
Adrian