Originally Posted by SRT6nTulsa
Glass breaking is urban legend. As an old IASCA / USAC enthusiast, I never saw it, even with vehicles hitting 172db.
A broken mount may cause it. MAYBE. But it is no more likely than it breaking over a speedbump. Pressure won't do it.
Don't worry.
Not TOTALLY an urban legend Tulsa, you have to take into account the kind of glass being used, because in most vehicles in high-end competition (Bass Race, dB Drag, etc.) the windows are replaced with plexi/safety glass for JUST that reason. I used to be a dB Drag and MECA guy myself (IASCA was just too restrictive.). The shop I worked at during that time had a patron with an Olds Bravada we sponsored, he broke out his rear panel...
To break glass with speakers you need a couple conditions to be met:
- Good "seals" on everything (which any vechicle with a system should have)
- Low tuned subs (In order to break glass you have to match the "resonant frequency" of the glass, which for back hatches/windshields is usually very low, 30-40 hz range
- around 163 dB and high SPL's...they're two different things.
A Famous quote: "You're born when you turn the key, Life starts at 163 dB"
Hope this helps someone thinking about trying to blow out their vehicle.