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<blockquote data-quote="its_bacon12" data-source="post: 3727012" data-attributes="member: 558729">i thoguht subs gave uummmmpphh //content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gifok.&nbsp; speed travels 343 m/s ideally.&nbsp; most situations, its less, some more.&nbsp; lets keep it constant.(343m/s x 40 inches) / 12 inches/ft = ~1143 ft/secnow. take the length of your ear to the speaker you want to find out whether its directional or not.&nbsp; back dash of a sedan, say.. 3.5 feet(1143 ft/sec) / 3.5 feet = 326.57/sec and we all know a number/time is frequency.&nbsp; your back dash becomes directional (if its 3.5 feet away from your ear) at 326.5 hz, because at 326.5 hz, the wavelength is 3.5 feetanything over that starts to ruin your front soundstage image.&nbsp; now, this is considered upper midbass to most people.&nbsp; unless you are trying to let people in your backseat hear the fullrange sound, anything over that draws back your soundstage.that range from say 80-320 hz will give you 2 full octaves of rearfill that most likely will give you more uummmmpphh in your front soundstage.this is not perfect by any means, nor near perfect, but will sound much better than full range coax&#039;s in the back (up front anyways)</blockquote>

[QUOTE="its_bacon12, post: 3727012, member: 558729"] i thoguht subs gave uummmmpphh [IMG]//content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif[/IMG] ok. speed travels 343 m/s ideally. most situations, its less, some more. lets keep it constant. (343m/s x 40 inches) / 12 inches/ft = ~1143 ft/sec now. take the length of your ear to the speaker you want to find out whether its directional or not. back dash of a sedan, say.. 3.5 feet (1143 ft/sec) / 3.5 feet = 326.57/sec and we all know a number/time is frequency. your back dash becomes directional (if its 3.5 feet away from your ear) at 326.5 hz, because at 326.5 hz, the wavelength is 3.5 feet anything over that starts to ruin your front soundstage image. now, this is considered upper midbass to most people. unless you are trying to let people in your backseat hear the fullrange sound, anything over that draws back your soundstage. that range from say 80-320 hz will give you 2 full octaves of rearfill that most likely will give you more uummmmpphh in your front soundstage. this is not perfect by any means, nor near perfect, but will sound much better than full range coax's in the back (up front anyways) [/QUOTE]

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