Stasys V2 topic?

Has this topic been moved? I cannot find it anymore?

I would imagine forum moderators chose to stick to their usual policy of not discussing or sharing plans for in production boxes.

Still wondering if that sketchup file was fully correct, but it seemed to match all details as can be seen in the video of the inside. Still bit strange design, the rearchamber is vented twice, ports of different length, normally this does not work an ports behave as 1.

Thanks for your reply,

So the horns are tuned to cover a certain range, which requires a certain horn length. By porting the rearchamber in these horns they start to act as a port, but with wrong tuning, the additional ports in the rearchamber correct this tuning. Is this how you think it works?

Best regards,

Walt

Nice to see you here again Walt.

If there are a number of ports that vent from a single rear chamber then their combined area becomes the new total area for the port. If the ports are of different lengths, you take the average of the mean distances to make the new single port length. You now have an area and a single length.

Of course things are not so simple as multiple ports emanating from different places will reduce the total port volume and require additional length for the same tuning frequency as a single port.

Ports that exit into larger ducts known as horns do not effect their operation as much as you would think. It is after all a larger space with different conscripts.
 

Contour wrote: So the horns are tuned to cover a certain range, which requires a certain horn length. By porting the rear chamber in these horns they start to act as a port, but with wrong tuning, the additional ports in the rear chamber correct this tuning.

The horns which are in front of the drivers have the required throat dimension, length, expansion and mouth size required to fulfil their goal. The ports which are there to introduce a new single lower tuning frequency to aide the horns output require the maximum area possible. The frontal area of the enclosure is already "busy" so any alternative paths for venting have to take place to get an even percentage of horn area vs port area.   

The horns are still horns, that just so happen to have a lower frequency injected into them. They don't alter the injected lower frequency as it's outside of their operational range. It's just a corridor to the vent.



Edited by Aman Gebru - 07 January 2017 at 2:05pm