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<blockquote data-quote="cx-7heaven" data-source="post: 7978022" data-attributes="member: 579914"><p>Ya, for an 18, you want at least a pair of deep stroking 15 pr's. You can't just toss in a PR in a system and expect it to do amazing things. If you are running ported, then a pr is out of the question, it needs to be a sealed setup. Second, a pr is a great help for a box that is very small for the sub you are running. If you are running a 6 cu.ft. sealed box for that 18, I'm not sure if that is a small box for that sub, more investigation is in order. Also, you want a PR to have a wall to reflect off of, they seem to work better that way.</p><p></p><p>As far as a recommendation goes, I bought one of these about 8 months ago and it works very well for me:</p><p></p><p><a href="http://www.sonicelectronix.com/item_38142_Earthquake-Sound-SLAPS15.html" target="_blank">Earthquake Sound SLAPS12 (SLAPS 15) 15" Audio Passive System</a></p><p></p><p>You can make an offer for around 105 for it and they will accept it. The downside to this particular one is that it comes with very little in the way of an owners manual, it is assumed that you already know what you are doing. I will link a thread I created in the DIYMA forum that has the spreadsheet that Earthquake created for tuning it. I had to get a hold of them, and it took a while to get it so here you go:</p><p></p><p><a href="http://www.diymobileaudio.com/forum/technical-advanced-car-audio-discussion/123186-tool-tune-earthquake-slaps-google-page-rankings.html" target="_blank">A tool to tune the Earthquake SLAPS PR's - DIYMA Car Audio Forum</a></p><p></p><p>good luck</p></blockquote><p></p>
[QUOTE="cx-7heaven, post: 7978022, member: 579914"] Ya, for an 18, you want at least a pair of deep stroking 15 pr's. You can't just toss in a PR in a system and expect it to do amazing things. If you are running ported, then a pr is out of the question, it needs to be a sealed setup. Second, a pr is a great help for a box that is very small for the sub you are running. If you are running a 6 cu.ft. sealed box for that 18, I'm not sure if that is a small box for that sub, more investigation is in order. Also, you want a PR to have a wall to reflect off of, they seem to work better that way. As far as a recommendation goes, I bought one of these about 8 months ago and it works very well for me: [URL="http://www.sonicelectronix.com/item_38142_Earthquake-Sound-SLAPS15.html"]Earthquake Sound SLAPS12 (SLAPS 15) 15" Audio Passive System[/URL] You can make an offer for around 105 for it and they will accept it. The downside to this particular one is that it comes with very little in the way of an owners manual, it is assumed that you already know what you are doing. I will link a thread I created in the DIYMA forum that has the spreadsheet that Earthquake created for tuning it. I had to get a hold of them, and it took a while to get it so here you go: [URL="http://www.diymobileaudio.com/forum/technical-advanced-car-audio-discussion/123186-tool-tune-earthquake-slaps-google-page-rankings.html"]A tool to tune the Earthquake SLAPS PR's - DIYMA Car Audio Forum[/URL] good luck [/QUOTE]
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