Reply to thread

Message

<blockquote data-quote="spltuscon" data-source="post: 6438917" data-attributes="member: 611863">Basically what was said above...Transmission line is typically tapered from an area greater than the sd of the sub down to the sd at the Terminus (the opening). You can vary the ratio of the line to change the acoustic properties of the enclosure. The line length is based on the 1/4, 1/2, or 3/4 length of the &quot;tuning frequency&quot; (ideally tuned to the drivers fs or just above). You can also stuff the line to slow down the sound waves and get a longer effective line length. Stuffing the line also lowers the impedance spike.Sound wise, they are very clean and tight, similar to a sealed box (good transient response) but the output is very similar to a ported box. The low end roll-off is much shallower than a ported box also, so they do very well on the lows.Of coarse there is more to it, but that&#039;s the basics //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif</blockquote>

[QUOTE="spltuscon, post: 6438917, member: 611863"] Basically what was said above... Transmission line is typically tapered from an area greater than the sd of the sub down to the sd at the Terminus (the opening). You can vary the ratio of the line to change the acoustic properties of the enclosure. The line length is based on the 1/4, 1/2, or 3/4 length of the "tuning frequency" (ideally tuned to the drivers fs or just above). You can also stuff the line to slow down the sound waves and get a longer effective line length. Stuffing the line also lowers the impedance spike. Sound wise, they are very clean and tight, similar to a sealed box (good transient response) but the output is very similar to a ported box. The low end roll-off is much shallower than a ported box also, so they do very well on the lows. Of coarse there is more to it, but that's the basics [IMG]//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif[/IMG] [/QUOTE]

Verification