Reply to thread

Message

<blockquote data-quote="Kukuraai" data-source="post: 8554283" data-attributes="member: 672530">Hey all, I drew up a design for a vented enclosure for a 12&quot; Polk subwoofer in my car, and before building it I wanted to run it through people with experience to see if anything immediately stands out as a problem. This is my first build so bear with meSo the outside dimensions are 28&quot; x 15&quot; x 14&quot;, using .75&quot; MDF. The net volume is 1.54 cu. ft., and the port is slotted at 12.5&quot; x 2&quot;, tuned to 27.4Hz at 54.75&quot; long. The sub is a Polk Audio MM1240DVC, and the suggested ported box volume is 1.58 cu. ft.. I put in the values to Speaker Box Lite for android and came up with a few graphs.Ignore the green line, the red is the ported box I designed and the blue is a 0.8 cu. ft. sealed enclosure, which is what I used to have the sub in.<a href="http://m.imgur.com/zJiy9sq" target="_blank">Imgur: The most awesome images on the Internet</a><a href="http://m.imgur.com/Nagk7RU" target="_blank">Imgur: The most awesome images on the Internet</a><a href="http://m.imgur.com/g8wTEKg" target="_blank">Imgur: The most awesome images on the Internet</a>I&#039;m not really familiar with phase response, does this all look good? My goal was to get a smoother (less punchy), deeper sound from my sub. The sealed enclosure I have sounds tight and clean, but I wasn&#039;t satisfied with how early it rolled off. I wanted to try and create a vented enclosure that was much deeper but still relatively responsive, and clean sound is also important.Also here&#039;s a rough sketch of the design itself. On the final design i planned on putting angles in the corners of the vent to allow the air to travel more smoothly.<a href="http://m.imgur.com/yX1UZRy" target="_blank">Imgur: The most awesome images on the Internet</a></blockquote>

[QUOTE="Kukuraai, post: 8554283, member: 672530"] Hey all, I drew up a design for a vented enclosure for a 12" Polk subwoofer in my car, and before building it I wanted to run it through people with experience to see if anything immediately stands out as a problem. This is my first build so bear with me So the outside dimensions are 28" x 15" x 14", using .75" MDF. The net volume is 1.54 cu. ft., and the port is slotted at 12.5" x 2", tuned to 27.4Hz at 54.75" long. The sub is a Polk Audio MM1240DVC, and the suggested ported box volume is 1.58 cu. ft.. I put in the values to Speaker Box Lite for android and came up with a few graphs. Ignore the green line, the red is the ported box I designed and the blue is a 0.8 cu. ft. sealed enclosure, which is what I used to have the sub in. [URL="http://m.imgur.com/zJiy9sq"]Imgur: The most awesome images on the Internet[/URL] [URL="http://m.imgur.com/Nagk7RU"]Imgur: The most awesome images on the Internet[/URL] [URL="http://m.imgur.com/g8wTEKg"]Imgur: The most awesome images on the Internet[/URL] I'm not really familiar with phase response, does this all look good? My goal was to get a smoother (less punchy), deeper sound from my sub. The sealed enclosure I have sounds tight and clean, but I wasn't satisfied with how early it rolled off. I wanted to try and create a vented enclosure that was much deeper but still relatively responsive, and clean sound is also important. Also here's a rough sketch of the design itself. On the final design i planned on putting angles in the corners of the vent to allow the air to travel more smoothly. [URL="http://m.imgur.com/yX1UZRy"]Imgur: The most awesome images on the Internet[/URL] [/QUOTE]

Verification