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<blockquote data-quote="hispls" data-source="post: 8453522" data-attributes="member: 614752">Optimize the box.&nbsp; For starters over build it, and build it bigger than you think you need.&nbsp;&nbsp; You can then easily add material to round corners or angle the rear (which can gain significantly)....or just add material to shrink the box if needed.Extreme reinforcing of panels next.&nbsp; If you don&#039;t care about competing where doing so would put you in extreme/modified classes welding some steel to the roof and doors or adding 1/4&quot; of fiberglass would be big.&nbsp; Fill behind plastic trim with caulking and similar so that nothing rattles or flexes.&nbsp;&nbsp; Even just heavy deadening to reduce the noise floor amounts to the same as free output as far as seeming audibly louder.Really throwing 1200$ at another 8K amp and another 1000$ into batteries won&#039;t gain you more than 2dB.&nbsp;&nbsp; A very poor investment compared to other options, particularly since if you don&#039;t reinforce panels they will sound awful and probably break anyway particularly if you try to double power.</blockquote>

[QUOTE="hispls, post: 8453522, member: 614752"] Optimize the box. For starters over build it, and build it bigger than you think you need. You can then easily add material to round corners or angle the rear (which can gain significantly)....or just add material to shrink the box if needed. Extreme reinforcing of panels next. If you don't care about competing where doing so would put you in extreme/modified classes welding some steel to the roof and doors or adding 1/4" of fiberglass would be big. Fill behind plastic trim with caulking and similar so that nothing rattles or flexes. Even just heavy deadening to reduce the noise floor amounts to the same as free output as far as seeming audibly louder. Really throwing 1200$ at another 8K amp and another 1000$ into batteries won't gain you more than 2dB. A very poor investment compared to other options, particularly since if you don't reinforce panels they will sound awful and probably break anyway particularly if you try to double power. [/QUOTE]

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