Thinking of "what would be best shape for a subwoofer box?" i came to idea of a barrel, with its sides (or covers) "replaced" with speakers:
I have stereo bass amplifier which is fed from single signal source. So there are 2 possible ways to connect a terminals to an amplifier channels:
- With zero phase offset: this would double the pressure inside (lower or higher than air), if is compared than a single speaker in a barrel
- With inverse phase offset: this would cancel out internal pressure. When front speaker's diaphragm would be pushed forward, back would be also pushed forward.
I am interested what scheme is used and why - what consequences inner pressure would introduce to bass sound, what effect would create those two schemes?