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<blockquote data-quote="cb1000r" data-source="post: 8113781" data-attributes="member: 644976">Umm motorcycle pipes and subwoofer output are different things entirely, on a moto pipe (i assume we are talking 4stroke) the ideal exhaust is reverse cone, and it has to be spot on to work exactly like it should, it actually uses backpressure to its advantage, not the case with your sub. Looka t GP bikes to see what I am talking about.1.5&quot; thick is not a problem at ALL with enclosure design, in fact less flex is better (usually), in car audio its all based on your particular vehicle, one persons gain can be your loss.&nbsp; On your other statements how in the hell do you design .5mm flex into your enclosure and how do you think this gives you 1.25mm extra flexibility in your foam, what ever the hell that even means.&nbsp; Where did you get this info...?&nbsp; and if flex is so good for subs why do world record holders and people who compete use fiberglass, concrete and any other method they canf or their class to eliminate flex in an enclosure or on their car?There are other things I would go over OP, how much port area do you have? port length and net airspace?&nbsp; Your construction method seems sound, let us see the dimensions.&nbsp; Small port, too high or too low tuning could be the problem, let us see the dims.</blockquote>

[QUOTE="cb1000r, post: 8113781, member: 644976"] Umm motorcycle pipes and subwoofer output are different things entirely, on a moto pipe (i assume we are talking 4stroke) the ideal exhaust is reverse cone, and it has to be spot on to work exactly like it should, it actually uses backpressure to its advantage, not the case with your sub. Looka t GP bikes to see what I am talking about. 1.5" thick is not a problem at ALL with enclosure design, in fact less flex is better (usually), in car audio its all based on your particular vehicle, one persons gain can be your loss. On your other statements how in the hell do you design .5mm flex into your enclosure and how do you think this gives you 1.25mm extra flexibility in your foam, what ever the hell that even means. Where did you get this info...? and if flex is so good for subs why do world record holders and people who compete use fiberglass, concrete and any other method they canf or their class to eliminate flex in an enclosure or on their car? There are other things I would go over OP, how much port area do you have? port length and net airspace? Your construction method seems sound, let us see the dimensions. Small port, too high or too low tuning could be the problem, let us see the dims. [/QUOTE]

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