LV12R vs. LVX12 vs. L22 for HT in Small Sealed Room

[RythmikAudio]

LV12R was designed before Edge of Tomorrow as release. The design objective is to get as much extension as possible and yet does not cause the driver to overexcursion (under constant strength signal) With all of movies I tested out, like "How to Train your Dragon" and others, LV12R is fine.

But EOT is something else. Sure we can come up with an aggressive roll-off contouring that can allow let customers sail through that opening scene. But what is the catch? After that 10 seconds, customers need to go back to the back panel to flip the extension to a different position for the rest of the 1 hour and 1/2 movies, or it will have less bass extension. Also the bad sound is primarily due to the wind noise. If I can be a movie critic for just a minute, I think the opening scene with 5db or 10db too hot down to 10hz serves no purpose. It could have stopped at 15hz and still make the point and yet let everyone enjoy the rest of movies with just one extension setting. If customers think this is ok to flip switch during a movie, we can design the filter into the next release of LV12R. The extension filter setting will then be LOW-music (same as HIGH now) and LOW-HT (same as LOW now) and then this EOT special switch.

Rumble filter on sealed subs is a different story. Sealed sub does not have this problem that ported subs have that below the port tuning frequency, the enclosure back pressure is decoupled from the driver and therefore the driver and port makes 180 degress out of phase outputs. Therefore the rumble filter in sealed subs protects the cone from over excursion with overloaded subsonic signal and yet still allows us hear some part of subsonic effect.