posted
Ummm... I am thinking that from the above posts people don't understand how an ABC box works... although that's not exactly new knowlege.
I'll freely admit that I'm not sure exactly how they work. Despite a lot of thinking and a lot of knowlege about how resonant systems work.
1.9* tuning frequency? Where on earth did you find that one?
I won't ever bother to make an ABC box, just because from what I do understand from it I know I can acheive a more effective result anyway using the last of the systems on the link I posted. And yes I do mean know. I may not be perfect at it yet, hence why I've not posted any suggestions on designing them, but I will once some more testing is done.
As far as the original question goes, try it using a pair of PVC ports, then compare the sound to a similar setup with the ports tuned the same. Try around a 15% tuning difference in the first instance. Any more than that and with even a medium Q ported system the lower port will do very little in the way of performance.
Colin
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posted
I know I'm a little late in posting to this thread, but the multiple port thing...
It will work, but it's way more trouble to figure out than it's worth.
Limited frequency offset as well, the speaker unloads easily if there is more than 10Hz between tuning frequencies. In my opinion it's not worth the effort, there isn't enough benefit from the extra port.
quote:Originally posted by Mabeita: I know I'm a little late in posting to this thread, but the multiple port thing...
It will work, but it's way more trouble to figure out than it's worth.
Limited frequency offset as well, the speaker unloads easily if there is more than 10Hz between tuning frequencies. In my opinion it's not worth the effort, there isn't enough benefit from the extra port.
Some people use perspex panels in their boxes though
-------------------- *hmm need to think of a new sig*
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