dominguez1, I appreciate what you've done with this thread and I think it's really very useful. I'm not trying to invalidate all the good work you've done here, and I couldn't if I tried.
Because these scores are a reasoned estimate, I think there's enough reasonable objection that the FV15HP's rating is inaccurate, and should be revised downward significantly where it chuffs at 12.5Hz and 16Hz, or not rated at those frequencies at all because they aren't usable at the output quoted for the equivalency without significant negative externalities.
Also, dominguez, as to "tactile feeling," or one sub configuration doing a better job at shaking/resonating, it has nothing to do with the type of sub you have. It's just a function of output at the resonant frequency of your materials/floor/walls/couch/whatever is shaking.
In a room that remains constant, it is not possible for your room to prefer shaking/resonating for ported over shaking/resonating for sealed, so let's not muddy the waters for the nubes.
It's not at all about the sub's configuration, not even one iota. It's solely about total overall output at the frequency(s) that resonate your materials/floor/walls/couch/whatever is shaking.
Also, to BeeMan, I'm not sure how you missed this on Rythmik's FV15HP webpage
, but it clearly states:
FV15HP uses our new high power H600PEQ3 servo amplifier and DS1510 driver. DS1510 features anodized aluminum cone, a 3" voice coil, and 200 oz magnet. Its linear excursion range has increased to +/- 20mm (from +/-15mm of DS1500). The entire subwoofer is 12lbs heavier. It also comes with grill and the above photo is shown with grill taken off.
I think we can all agree the driver in the FV15HP has 20mm of excursion, hence my desire to simulate ported subs with 20mm useable stroke.
Josh Ricci, in testing the FV15HP, said this about the ports:
The FV15HP is medium to large sized for a commercial HT subwoofer with two 3" flared ports and the 15" driver all mounted to the front panel.
which is why I modeled using a single 3" round port. Modeling helped me see the relationship between size and length of ports and the tuning. It's really important to get this right, and keep port air velocity below 26m/s (the point at which chuffing is audible).