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<blockquote data-quote="tlooknbill" data-source="post: 7252160" data-attributes="member: 594447">Study the Japan earthquake tsunami&#039;s exponentially compounded wave dispersion pattern to tell you it won&#039;t matter which direction you point your subs. Low (large wave) frequencies are non-directional and need LOTS of air (tsunami LOTS of water) to create large waves from the point of source (subs) with a lot of torgue energy=(SPL=lots of power) to be heard REALLY loudly. Being in the car&#039;s cabin is too close for these waves to build up this compounded wave energy pattern to be effectively heard as loud as compared to someone listening 50 yards away.This is why neighbors complain about hearing in their homes the car booming down the street when the driver isn&#039;t aware they are THAT loud. I verified this physics lesson with a local high end car audio installer. I tested this myself when I went up to the car that had stopped at an intersection and noticed I could no longer hear that annoying low humming boom from the driver&#039;s ported subs I heard in my home. He hadn&#039;t turned down his system either.I have my two sealed 2 ohm 10&quot; subs facing toward me in my trunk as close to the back seats as possible because I need the room to put groceries in the trunk of my Nissan Sentra. I&#039;ve rearranged the subs in every direction possible and couldn&#039;t hear any difference in sound or loudness.However they are powered with maybe at the most 50 watts each RMS wired in series to present a 4 ohm load to a 250 watt Alpine amp so they don&#039;t have enough energy/torgue/SPL to project their peak compounded wave pattern outward but only a small distance which happens to be my front seat. They aren&#039;t reproducing any directional frequencies for me to detect what direction they&#039;re pointing especially since the car is acting as an additional enclosure.</blockquote>

[QUOTE="tlooknbill, post: 7252160, member: 594447"] Study the Japan earthquake tsunami's exponentially compounded wave dispersion pattern to tell you it won't matter which direction you point your subs. Low (large wave) frequencies are non-directional and need LOTS of air (tsunami LOTS of water) to create large waves from the point of source (subs) with a lot of torgue energy=(SPL=lots of power) to be heard REALLY loudly. Being in the car's cabin is too close for these waves to build up this compounded wave energy pattern to be effectively heard as loud as compared to someone listening 50 yards away. This is why neighbors complain about hearing in their homes the car booming down the street when the driver isn't aware they are THAT loud. I verified this physics lesson with a local high end car audio installer. I tested this myself when I went up to the car that had stopped at an intersection and noticed I could no longer hear that annoying low humming boom from the driver's ported subs I heard in my home. He hadn't turned down his system either. I have my two sealed 2 ohm 10" subs facing toward me in my trunk as close to the back seats as possible because I need the room to put groceries in the trunk of my Nissan Sentra. I've rearranged the subs in every direction possible and couldn't hear any difference in sound or loudness. However they are powered with maybe at the most 50 watts each RMS wired in series to present a 4 ohm load to a 250 watt Alpine amp so they don't have enough energy/torgue/SPL to project their peak compounded wave pattern outward but only a small distance which happens to be my front seat. They aren't reproducing any directional frequencies for me to detect what direction they're pointing especially since the car is acting as an additional enclosure. [/QUOTE]

Verification