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Need some basic help with a 15" Type-R and a ported box
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<blockquote data-quote="miska_man" data-source="post: 6942368" data-attributes="member: 624895"><p>Hi, I'm new to car audio within the last 6 months or so and already have somewhat of a system going. After ready miscellaneous information spewed around the interwebz, I figured joining a forum might be a better idea.</p><p></p><p>I'm on my second box (custom designed and built by me and friends to fit in MY cars trunk). Right now it's sealed, but I'm in the process of redoing it to make it ported. My <strong>goal</strong> is LOUD and IMPRESSIVE on a budget.</p><p></p><p><span style="font-size: 14px">Basically what I'm trying to </span><span style="font-size: 14px"><strong>figure out is the proper port length</strong></span><span style="font-size: 14px"> to accomplish my </span><span style="font-size: 14px"><strong>goal</strong></span><span style="font-size: 14px">, but I keep on coming up with different numbers in WinISD and other calculators. Right now I have a </span><span style="font-size: 14px"><strong>3" OD round port (2.45" ID)</strong></span><span style="font-size: 14px"> and my goal is to tune to </span><span style="font-size: 14px"><strong>30hz.</strong></span><span style="font-size: 14px"> Can anyone give me some recommendations or tips/hints?</span></p><p></p><p>My current setup consists of the following:</p><p></p><ul> <li data-xf-list-type="ul">Alpine Type-R 15" (750RMS, 2000 max)<br /> </li> <li data-xf-list-type="ul">Kenwood KAC-9104D (supposedly an 1800 watt amp, looks like it's limited to 900watts at 1ohm) was running a 4 ohms, when the box is finished I plan on 1ohm<br /> </li> <li data-xf-list-type="ul">4 gauge Rockford Fosgate wiring<br /> </li> <li data-xf-list-type="ul">Rockford Fosgate battery terminals<br /> </li> <li data-xf-list-type="ul">Cheapo Sony Xplod headunit (want to upgrade to an Alpine)<br /> </li> <li data-xf-list-type="ul">5.5 cubic ft external, 4.3 cubes internal volume box; 3/4" MDF custom built (36"x24"x11")<br /> (made to fit under my rear shelf which is 12.5" from floor)<br /> </li> <li data-xf-list-type="ul">Big three upgrade in the works (4 gauge combined with stock wiring)<br /> </li> </ul><p></p><p>Woofer is firing upwards (won't fit under shelf firing backwards/forwards) and I want to have my port facing into the cabin through a hole in the rear armrest (Is this a good idea?)</p><p></p><p><img src="http://i118.photobucket.com/albums/o88/miska_man/Video700m00s.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p><img src="http://i118.photobucket.com/albums/o88/miska_man/P1011397.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p><img src="http://s118.photobucket.com/albums/o88/miska_man/?action=view&amp;current=P1011400.jpg&amp;newest=1" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p><img src="http://i118.photobucket.com/albums/o88/miska_man/P1011375.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p><img src="http://i118.photobucket.com/albums/o88/miska_man/P1011379.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p></blockquote><p></p>
[QUOTE="miska_man, post: 6942368, member: 624895"] Hi, I'm new to car audio within the last 6 months or so and already have somewhat of a system going. After ready miscellaneous information spewed around the interwebz, I figured joining a forum might be a better idea. I'm on my second box (custom designed and built by me and friends to fit in MY cars trunk). Right now it's sealed, but I'm in the process of redoing it to make it ported. My [B]goal[/B] is LOUD and IMPRESSIVE on a budget. [SIZE=14px]Basically what I'm trying to [/SIZE][SIZE=14px][B]figure out is the proper port length[/B][/SIZE][SIZE=14px] to accomplish my [/SIZE][SIZE=14px][B]goal[/B][/SIZE][SIZE=14px], but I keep on coming up with different numbers in WinISD and other calculators. Right now I have a [/SIZE][SIZE=14px][B]3" OD round port (2.45" ID)[/B][/SIZE][SIZE=14px] and my goal is to tune to [/SIZE][SIZE=14px][B]30hz.[/B][/SIZE][SIZE=14px] Can anyone give me some recommendations or tips/hints?[/SIZE] My current setup consists of the following: [LIST] [*]Alpine Type-R 15" (750RMS, 2000 max) [*]Kenwood KAC-9104D (supposedly an 1800 watt amp, looks like it's limited to 900watts at 1ohm) was running a 4 ohms, when the box is finished I plan on 1ohm [*]4 gauge Rockford Fosgate wiring [*]Rockford Fosgate battery terminals [*]Cheapo Sony Xplod headunit (want to upgrade to an Alpine) [*]5.5 cubic ft external, 4.3 cubes internal volume box; 3/4" MDF custom built (36"x24"x11") (made to fit under my rear shelf which is 12.5" from floor) [*]Big three upgrade in the works (4 gauge combined with stock wiring) [/LIST] Woofer is firing upwards (won't fit under shelf firing backwards/forwards) and I want to have my port facing into the cabin through a hole in the rear armrest (Is this a good idea?) [IMG]http://i118.photobucket.com/albums/o88/miska_man/Video700m00s.jpg[/IMG] [IMG]http://i118.photobucket.com/albums/o88/miska_man/P1011397.jpg[/IMG] [IMG]http://s118.photobucket.com/albums/o88/miska_man/?action=view&current=P1011400.jpg&newest=1[/IMG] [IMG]http://i118.photobucket.com/albums/o88/miska_man/P1011375.jpg[/IMG] [IMG]http://i118.photobucket.com/albums/o88/miska_man/P1011379.jpg[/IMG] [/QUOTE]
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Need some basic help with a 15" Type-R and a ported box
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