Xcentric
GT Owner
Ha! For the conspiracy theorists re sound waves: Consider that the McIntosh puts out frequencies greater than most of our aging ears can hear and, at maximum volume, pressures that can cause permanent hearing loss. AND...the subwoofer is mounted against the bulkhead! I'll bet the window vibrates enough to make its own sound.
Yes, an opera singer live or on Memorex tape can shatter a wine glass if the volume (pressure) is high enough. But, that is because the curvature of the glass allows the waves to be focused. You just have to maintain the natural resonance frequency (the ring when you tap a glass with a fingernail) long and loud enough.
Sound waves can't crack flat glass, because there is no focus point. Two exceptions: The sound is so intense (e.g., from an explosion) that it creates massive over-pressure. In which case, your body would also have big problems. Or, the glass has a crack that the sound vibrations (or any stress) can propagate.
I think I shot down my own hypothesis of hardened adhesive. The urethane adhesive appears to be the expanded foam type. On my car it is soft to the touch on the engine side. I can compress it with a fingernail.
Yes, an opera singer live or on Memorex tape can shatter a wine glass if the volume (pressure) is high enough. But, that is because the curvature of the glass allows the waves to be focused. You just have to maintain the natural resonance frequency (the ring when you tap a glass with a fingernail) long and loud enough.
Sound waves can't crack flat glass, because there is no focus point. Two exceptions: The sound is so intense (e.g., from an explosion) that it creates massive over-pressure. In which case, your body would also have big problems. Or, the glass has a crack that the sound vibrations (or any stress) can propagate.
I think I shot down my own hypothesis of hardened adhesive. The urethane adhesive appears to be the expanded foam type. On my car it is soft to the touch on the engine side. I can compress it with a fingernail.
