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<blockquote data-quote="keep_hope_alive" data-source="post: 7472887" data-attributes="member: 576029">the main issue with 4&quot; in the a-pillar is PLD.&nbsp; they are so close that you&#039;ll need time alignment to delay them so your sound stage doesn&#039;t pull to the closest side.harshness is the result of phase interference from specular reflections and diffraction.midbass in the kick is difficult due to airspace.&nbsp; midbass in the door is easier.midrange in the kick is nice due to minimal PLD.&nbsp; but you want time alignment between the kick mid and door midbass, and you&#039;re building a 1-seat car.tweeters can set stage height, which is why they are commonly at ear level.&nbsp; but aiming is based on testing.&nbsp; each car is different.some prefer to aim kick mids just behind the opposite passenger, near the b-pillar.&nbsp; some near the dome light.&nbsp; testing will determine which is best.also note that &quot;beaming&quot; will determine at what point a driver will become highly directional. this is why smaller (4&quot;) midrange drivers are preferred in 3-way systems.&nbsp; you want your mid to have the widest frequency response possible.<a href="http://www.paradigm.com/all-about-sound/the-low-down-on-dispersion" target="_blank">The Low-Down on Dispersion - Welcome to the New Official Paradigm® Website.</a></blockquote>

[QUOTE="keep_hope_alive, post: 7472887, member: 576029"] the main issue with 4" in the a-pillar is PLD. they are so close that you'll need time alignment to delay them so your sound stage doesn't pull to the closest side. harshness is the result of phase interference from specular reflections and diffraction. midbass in the kick is difficult due to airspace. midbass in the door is easier. midrange in the kick is nice due to minimal PLD. but you want time alignment between the kick mid and door midbass, and you're building a 1-seat car. tweeters can set stage height, which is why they are commonly at ear level. but aiming is based on testing. each car is different. some prefer to aim kick mids just behind the opposite passenger, near the b-pillar. some near the dome light. testing will determine which is best. also note that "beaming" will determine at what point a driver will become highly directional. this is why smaller (4") midrange drivers are preferred in 3-way systems. you want your mid to have the widest frequency response possible. [URL="http://www.paradigm.com/all-about-sound/the-low-down-on-dispersion"]The Low-Down on Dispersion - Welcome to the New Official Paradigm® Website.[/URL] [/QUOTE]

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