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<blockquote data-quote="Zylo" data-source="post: 374455" data-attributes="member: 547289">I do realize that SQ, and even SPL is 10% equipment, 90% install..I have a 2003 F150 extended cab, and I am currently going over a few design issues.I think I may go with a fiberglass bottom to maximize the space available.. but not to sure as of yet. (there is a ledge that I will be building over)What are some basic things I will need to look for to build a SQ-related box? (75/25 SQ/SPL)I have a bunch of plywood in my possesion so I can rig up some &#039;test&#039; boxes to check fitment, and such.Should I downfire the subwoofer? It will most likely be a 15&quot; Brahma or SI 15&quot;, maybe a JL 15W3 (less mounting depth.. I think).. if the 15&quot; doesn&#039;t fit, I will go with 2 SI Magnums, or a Brahma 12..Downfiring sounds so good, because I am shooting for a stealthy install for security purposes (daily driver) and it keeps the sub well hidden, and free from damage incase someone does break in.How does box alignment affect SQ? (to keep it simple, I&#039;ll use the Brahma 15)For example:a B15 in a .707Qtc box (2.85 ft^3)vs.a B15 in a .800Qtc box (1.89 ft^3)I&#039;d rather have a more pronounced lower-end that higher frequency response.. cutoff at 80.. 125 at most.Also, if the role of a sealed box is to keep the backwave seperated from the front wave.. what about dynamatting the inside of the box? stupid idea??I hope bolding the questions helped make it easier to read..Thanks for looking, and thanks in advance for any tips/advice!!&nbsp; //content.invisioncic.com/y282845/emoticons/smash.gif.499e08a4a35ffaf54f4c8194fb8fe8ed.gif</blockquote>

[QUOTE="Zylo, post: 374455, member: 547289"] I do realize that SQ, and even SPL is 10% equipment, 90% install.. I have a 2003 F150 extended cab, and I am currently going over a few design issues. I think I may go with a fiberglass bottom to maximize the space available.. but not to sure as of yet. (there is a ledge that I will be building over) [B]What are some basic things I will need to look for to build a SQ-related box? (75/25 SQ/SPL)[/B] I have a bunch of plywood in my possesion so I can rig up some 'test' boxes to check fitment, and such. [B]Should I downfire the subwoofer?[/B] It will most likely be a 15" Brahma or SI 15", maybe a JL 15W3 (less mounting depth.. I think).. if the 15" doesn't fit, I will go with 2 SI Magnums, or a Brahma 12.. Downfiring sounds so good, because I am shooting for a stealthy install for security purposes (daily driver) and it keeps the sub well hidden, and free from damage incase someone does break in. [B]How does box alignment affect SQ?[/B] (to keep it simple, I'll use the Brahma 15) For example: a B15 in a .707Qtc box (2.85 ft^3) vs. a B15 in a .800Qtc box (1.89 ft^3) I'd rather have a more pronounced lower-end that higher frequency response.. cutoff at 80.. 125 at most. [B]Also, if the role of a sealed box is to keep the backwave seperated from the front wave.. what about dynamatting the inside of the box? stupid idea??[/B] I hope bolding the questions helped make it easier to read.. Thanks for looking, and thanks in advance for any tips/advice!! [IMG]//content.invisioncic.com/y282845/emoticons/smash.gif.499e08a4a35ffaf54f4c8194fb8fe8ed.gif[/IMG] [/QUOTE]

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