Originally Posted by eljaycanuck
212 / 215 clearly represents the # of drivers and the size of the drivers. BPS likely stands for "bi-polar sealed".
So, a single ported 15" sub might be something like:
- UPV115 (uni-polar vented)
- SPV115 (single-polar vented)
- FFV115 (front-firing vented)
- DFV115 (down-firing vented)
- BFV115 (bottom-firing vented)
No thanks or royalties are required, but if Reaction insists on sending me a complimentary BPS215 (or two), I won't say no.
Ahhhh, great names eljay !
Here's where we are at with a vented 15":
We've experimented with the idea.
The cabinet size would be about the same as the BPS 215 , so it's doable but would not be any less expensive to produce.
But everything we've tested and modeled ends up not gaining anything significant in terms of average output. Maybe 2 - 3 db advantage near port tuning, but above that:
The BPS 215 would start to surpass above 35hz. Even as much as 6db at the 40-80hz range. We could throw much more excursion and much more power at the problem but you start to get diminishing returns.
Not to mention that means escalating cost.
We would be able to increase CEA output numbers at 20hz, but I'm not interested in winning drag races.
The ported version would have a flatter naked curve.
I am intrigued by the idea of a vented 18". I'm just not sure Jim and I are up for the visits to the chiropractor after moving around those boxes lol.
The BPS 215 has a compelling amount of output for the under $1000 category. It's actually really solid at 20hz and absolutely pounds in what I think of as the "money octave" region between 30-60hz.
Where most sub bass content resides.
I think that after some folks hear it it will be seen as a great alternative to a vented unit with it's headroom and output. Even those with large rooms.
BTW a pair of BPS 212s is within a few db of max output of the 215. Not quite as powerful but very formidable with nearly 2000cm2 of sd.
When we do come out with a ported model it has to offer an advantage in performance or value that the other units don't cover.