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<blockquote data-quote="mrogowski" data-source="post: 3206369" data-attributes="member: 569061">I&#039;m actually surprised at how many folks *aren&#039;t* using Sonotubes et al for their car audio projects.&nbsp; They are widely used for Home Theatre sub projects - large ones for the enclosure (18&quot;, 20&quot; 24&quot;) and the smaller units for the ports (6&quot;, 8&quot; 10&quot;).Chad:As per what the other poster stated, you create a &quot;plug&quot; for the ends - two pieces of MDF; one larger than the diameter of the tube and the second that fits inside the tube.&nbsp; Glue the two together and there you have it.&nbsp; Instant enclosure in a couple of hours.&nbsp; //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gifHere&#039;s an on-line Sonotube Calculator I use periodically to determine tube sizes for enclosures:<a href="http://www.quux.net/roo/diy/sonosub/sonocalc.html" target="_blank">http://www.quux.net/roo/diy/sonosub/sonocalc.html</a>Sonotube ports:Sonotubes are great for ports - they are cheap and come in a variety of sizes.&nbsp; As a couple of folks have mentioned, some brands have the &quot;extended&quot; sizes - one tube fits inside the other.&nbsp; These provide excellent choices of sizes since a &#039;6&#039; tube measures 6&quot;, &#039;6+&#039; tube measures ~6.5&quot;, &#039;8&#039; tube measures 8&quot;, &#039;8+&#039; measures ~8.5&quot;, etc.Collo has extensive information on his site regarding port flaring.&nbsp; Very interesting read.&nbsp; He has also created Sonosub design software which is very good:<a href="http://www.subwoofer-builder.com/flare-testing.htm" target="_blank">http://www.subwoofer-builder.com/flare-testing.htm</a>Regarding trying to flair a Sonotube, I think you would have problems since you are only dealing with cardboard, and we all know what happens to cardboard when it gets wet.Best,Mark</blockquote>

[QUOTE="mrogowski, post: 3206369, member: 569061"] I'm actually surprised at how many folks *aren't* using Sonotubes et al for their car audio projects. They are widely used for Home Theatre sub projects - large ones for the enclosure (18", 20" 24") and the smaller units for the ports (6", 8" 10"). Chad: As per what the other poster stated, you create a "plug" for the ends - two pieces of MDF; one larger than the diameter of the tube and the second that fits inside the tube. Glue the two together and there you have it. Instant enclosure in a couple of hours. [IMG]//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif[/IMG] Here's an on-line Sonotube Calculator I use periodically to determine tube sizes for enclosures: [URL="http://www.quux.net/roo/diy/sonosub/sonocalc.html"]http://www.quux.net/roo/diy/sonosub/sonocalc.html[/URL] Sonotube ports: Sonotubes are great for ports - they are cheap and come in a variety of sizes. As a couple of folks have mentioned, some brands have the "extended" sizes - one tube fits inside the other. These provide excellent choices of sizes since a '6' tube measures 6", '6+' tube measures ~6.5", '8' tube measures 8", '8+' measures ~8.5", etc. Collo has extensive information on his site regarding port flaring. Very interesting read. He has also created Sonosub design software which is very good: [URL="http://www.subwoofer-builder.com/flare-testing.htm"]http://www.subwoofer-builder.com/flare-testing.htm[/URL] Regarding trying to flair a Sonotube, I think you would have problems since you are only dealing with cardboard, and we all know what happens to cardboard when it gets wet. Best, Mark [/QUOTE]

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