Originally Posted by brandonnash
If its your room that's causing this problem you can add and add and still probably have a problem. If you take a corvette and add horsepower to it it should go faster, but it will have a limited top speed if its trying to haul 2 tons of concrete behind it.
Maybe so, and if that's the case, then it's sad that I can't go to any other room.
I tried boosting the signal 18dB (and dropping the receiver's output and lowering the gain knob a bit). No diff really. The driver starting making bad noises at the same SPL (I am right in front of the driver, can barely feel it).
The whole subwoofer visibly shakes a bit with lower freqencies, so maybe it needs a bit of work?
I remember these speakers outside in a pavillion (size of a basketball court) once. There were 2 of them, one on each side widthwise, each with a 12" driver and a horn. There was a QSC amp with 200w/ch at the speaker impedance rating. They were playing a song and turned it up a bit, and I could strongly feel it from the other side of the pavillion.
I understand they were Klipsch pro speakers and probably had high sensitivity.
It's funny because here I am with a large 18" subwoofer on a 2000w amp in a 2500 cubic foot (with a large opening into 8000 cubic feet) room and I have yet to feel it.
I also remember, not far from that same pavillion, a building where they had maybe 12 15" drivers and a few 12s spread across the front of a stage in a very large room (200x80x40 feet, I bet, probably larger).
They played Breathe Into Me by Red and I could easily feel it when it was at normal volume. Then they played this rap song and it was awesomely loud, the bass. I could feel the bass after I left the building, and I could hear the bass long after I stopped being able to see the building.
Then I also remember, in another room, even larger than the first, they have 4 18" subwoofers which can easily be felt as well. It is owned by the same people.
Not only could I feel it in these situations, but it sounded great too, especially 2nd room.
So then I go back to, why can 2 12s on 400w total be felt outside on opposite ends of a pavillion when I cannot feel an 18" in a small room with a 2000w amp backing it?
I currently have the subwoofer turned off as it seems to cause "more harm than good."