Originally Posted by mwmkravchenko
There is indeed a net benfit to be had by using a second driver changing the tap position and altering the flare.
But this is no longer the elegant solution that this fine thread is about.
Maybe a thread showing what GM has designed would be in order? Come on Greg you know you have a good design there!
Hmm, unfortunately, your clarification leaves me wondering what constitutes an 'elegant solution'. To my way of thinking, the small dual driver design is one, though this has nothing to do with my original point.
WRT the single driver one, it's small enough that I didn't need to fold it up to tell that some space would have to wasted to make the driver fit, but again, it had nothing to do with my point, i.e. while super low Vas drivers can be made to work in THs, the math says they really need two or more to get the net Vb required for good acoustic loading same as occurs when using them in any other vented alignment.
Regardless, if Mike's design is doubled, then it increases it ~3 dB and of course if available power is increased it could be double that and then some depending on the frequency, so it depends on the needs of the app whether the extra bulk/cost can be justified or better to use a different driver/alignment.
Do you mean the dual driver one? No one seems to have any interest and I'm not going to spend any time on folding any design I don't plan to build for myself.