Yes exactly. You seem to understand reflex cabinets alot more than others do.
Unlike looking at graphs and making assumptions. You actually have a graph and a real working cab matching that graph. And know how it really sounds.
Many look at a graph and assume no low end with low tuned cab. And tune high for " more bass" when yes your fundamental is 40hz and the reflex can be used to actually protect the speaker. Unlike the typically people thinking they have more bass with high tuned cabinets.
Sometimes you get what you get with 2 drivers. Efficiency is very high with these drivers but if you need more sometimes it's really just a case of needing 3 more dB or double the effective area. 2x12 to a 4x12 to not get fart out.
Likewise I assumed you were high tuned to 80hz and as you seen I thought your fart out was from over excursion below Fb.
Now we know your at very typical 3.8 to 4 cubic for 2x12 and tuned to 30hz.
I'm still getting the feeling this driver is high efficiency driver that does well in small enclosures and possibly be great for floor monitor applications.
Drivers like this again are useful for bass applications. But with typical expert advice they are gonna place them in typical high tuned Butterworth alignments. And say blah blah blah this isn't a good speaker for bass.
Like I mentioned before. The driver will most likely do well in a very small enclosure. This will increase power handling and reduce the deep bass you are hearing. Likewise exactly making it perfect candidate possible for extended bass shelf. Which means low tuning of the reflex to protect the speaker for the application... bass. Fundamental bandwidth at 33 or 44hz and making the enclosure very small for power handling.
At 3.8 cubic feet, you have roughly 1.9 cubic feet per driver. Which is a very good design for most 12s with a different bandwidth efficiency. This is why there is very little Q in the model and the high tuners aren't seeing the graph they assume won't have " bass" in reality it does. And to add more Q the same instinct would be to high tune to see there pretty little graph. In reality...what they get is a to large to highly tuned reflex.
Even auto calculate programs don't give you good alignments for drivers such as this for bass applications. It will give you a larger high tuned box to get the needed Q to be close to a Butterworth response.
As I mentioned before. For high efficiency like this you dramatically reduce the volume to raise system Q. You do not raise tuning.
If your at 1.9 cubic feet per driver. It's even possible to get higher Q around 1.4 to even 1 cubic feet per driver to raise system Q. Which is very small for typical 12. But again bandwidth efficiency is different for this driver.
So again you raise cabinet Q response with a smaller enclosure. Not tuning. And then again use 35 to 45 Hz tuning to use the reflex to protect the woofer for its intended application.
Hence being closer to a extended bass shelf. Not a Butterworth.
I'll assume a Butterworth would be around 1.4 to 1.6 cubic feet and grossly high tuned to 65hz or higher. And would give people the pretty graph they wanna see.
In reality for bass. Most likely .9 to 1.2 cubic per driver would help power handling. And a low tuned bass shelf around 28 to 37 Hz will protect the woofer and give better transients.
This is why I asked what a -3dB or -6dB EBS or Extended bass shelf is for this driver.
Your looking at cone excursion graphs for power handling. And already more wise than most. Max SPL just applys max thermal power to the driver. Makes a pointless graph. Your applying lower power levels and viewing actual real world fundamental behavior at xmax and actually observing the reflex function for the intended purpose...bass. You are very wise.
