Hi All,
At the moment I'm experimenting with a axisymetric horn on a coax driver, which is an off the shelf device. The device is quite loud (it's intended for PA use), but is way too harsh to me to be usable.
I've dismantled the device to check on the design (see attached picture) And I've found one thing which could certainly be the cause of some problems. The throat of the horn has a quite large (38mm wide, 45mm height) piece which is almost straight, this is the part which goes through the magnet of the LF driver. Then the real horn starts with a quite abrupt bent, all possible HOM generators.
My idea was to create (having it tooled from aluminium) a throatpiece which turns the original throat (black line) into the modified throat (red line), basically narrowing the throat entrance so it can expand to the horn flare.
I have run some BEM simulations on this, as seen in the picture, and the results look quite promising, smoother FR, smoother off axis response and even higher output.
My question is: before I get the piece tooled, which will obviously cost some money, I would like to know if I am really missing something here and if it, for some reason is a very bad idea to do this. (compression, distortion, heat, diafragma destruction etc.)
many thanks in advance,
Kees
At the moment I'm experimenting with a axisymetric horn on a coax driver, which is an off the shelf device. The device is quite loud (it's intended for PA use), but is way too harsh to me to be usable.
I've dismantled the device to check on the design (see attached picture) And I've found one thing which could certainly be the cause of some problems. The throat of the horn has a quite large (38mm wide, 45mm height) piece which is almost straight, this is the part which goes through the magnet of the LF driver. Then the real horn starts with a quite abrupt bent, all possible HOM generators.
My idea was to create (having it tooled from aluminium) a throatpiece which turns the original throat (black line) into the modified throat (red line), basically narrowing the throat entrance so it can expand to the horn flare.
I have run some BEM simulations on this, as seen in the picture, and the results look quite promising, smoother FR, smoother off axis response and even higher output.
My question is: before I get the piece tooled, which will obviously cost some money, I would like to know if I am really missing something here and if it, for some reason is a very bad idea to do this. (compression, distortion, heat, diafragma destruction etc.)
many thanks in advance,
Kees