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Enclosure Design & Construction
L Slot with only a couple inches after bend?
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<blockquote data-quote="Umbra" data-source="post: 8484999" data-attributes="member: 658055"><p>My brother does Pro Audio and rather than buy a $700 prebuilt with a $150 sub in it he's going to buy a serious sub and build the enclosure. He's not a DJ. I know he does a lot of sound reinforcement for live performances.</p><p></p><p>This is the sub he's looking at, a B&amp;C 18SW115:</p><p></p><p><a href="http://www.bcspeakers.com/products/lf-driver/18-0/8/18sw115" target="_blank">B&amp;C Speakers</a></p><p></p><p>As per their 5.3 cuft and 35Hz tuning recommendations, here's my Torres design:</p><p></p><p><a href="http://imgur.com/Uzb6lTb" target="_blank"><img src="http://i.imgur.com/Uzb6lTbh.png" alt="" class="fr-fic fr-dii fr-draggable " style="" /></a></p><p></p><p>Its still in the early stages and I haven't figured out the bracing yet, so I'll have to adjust accordingly. I think I've got plenty of port area. I made the box a little bigger so I could make an L - shaped port, rather than a straight port with just a few inches from the back wall.</p><p></p><p>I know a port with too little clearance raises the tuning. Is the golden rule to put at least the width of the port's worth of space between the end of the port and the back wall? Between a straight port and an L port with only a couple of inches along the back wall after the bend, is their any advantages or disadvantages between the two? Which would you do? I floated the idea of aeros by him and he didn't seem that into it.</p><p></p><p>All I know about box design is from car audio; I don't know much about pro audio. Right now the sub and port are forward facing only because that's how the JBL prebuilt I'm using as a reference and many others has it. If there's anything I'm overlooking please let me know.</p><p></p><p>Thanks for any help you might be able to provide.</p></blockquote><p></p>
[QUOTE="Umbra, post: 8484999, member: 658055"] My brother does Pro Audio and rather than buy a $700 prebuilt with a $150 sub in it he's going to buy a serious sub and build the enclosure. He's not a DJ. I know he does a lot of sound reinforcement for live performances. This is the sub he's looking at, a B&C 18SW115: [URL="http://www.bcspeakers.com/products/lf-driver/18-0/8/18sw115"]B&C Speakers[/URL] As per their 5.3 cuft and 35Hz tuning recommendations, here's my Torres design: [URL="http://imgur.com/Uzb6lTb"][IMG]http://i.imgur.com/Uzb6lTbh.png[/IMG][/URL] Its still in the early stages and I haven't figured out the bracing yet, so I'll have to adjust accordingly. I think I've got plenty of port area. I made the box a little bigger so I could make an L - shaped port, rather than a straight port with just a few inches from the back wall. I know a port with too little clearance raises the tuning. Is the golden rule to put at least the width of the port's worth of space between the end of the port and the back wall? Between a straight port and an L port with only a couple of inches along the back wall after the bend, is their any advantages or disadvantages between the two? Which would you do? I floated the idea of aeros by him and he didn't seem that into it. All I know about box design is from car audio; I don't know much about pro audio. Right now the sub and port are forward facing only because that's how the JBL prebuilt I'm using as a reference and many others has it. If there's anything I'm overlooking please let me know. Thanks for any help you might be able to provide. [/QUOTE]
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L Slot with only a couple inches after bend?
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