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Car Audio Discussion
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SQ Subwoofers
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<blockquote data-quote="keep_hope_alive" data-source="post: 8659081" data-attributes="member: 576029"><p>There are many factors that determine how much "SQ" you can get out of a sub, and sub selection is lower on the list of important items. The enclosure and sub combo will determine the low end extension that can be produced and the sub/enclosure placement in the vehicle determine what you actually hear. </p><p></p><p>The Sundown SA-12 can be an excellent budget SQ sub and one I may personally run in the near future (replacing an expensive sub). If you'd like to now more about why I mention Sundown, there is a good interview with the owner here where he discusses his testing procedures and what the latest version has to offer:</p><p></p><p>[MEDIA=youtube]RTyl2TJdnEU[/MEDIA]</p><p></p><p></p><p></p><p>Dayton Audio also makes good products for the price point. That said, JL Audio does an excellent job and their products are highly recommended.</p><p></p><p>The idea that you need a sealed enclosure for SQ is a misnomer. Ported enclosures can improve/extend frequency response and increase overall enclosure efficiency. Both of which can help with SQ goals. But the placement of the enclosure determines what cancellation you will get. Consider wavelengths of interest and how the rear of the vehicle produces a reflection that can cancel the direct path. Certainly, take time to play around with placement, and don't be surprised if rear corner loading (facing into the corner) sounds the best. One good way to test is to listen to tracks with bass that "walks the scale" - meaning it varies from high to low frequencies while you listen for consistent output. If some notes are louder than others (and conversely some are quieter) then you may be hearing phase interference (cancellation or addition).</p></blockquote><p></p>
[QUOTE="keep_hope_alive, post: 8659081, member: 576029"] There are many factors that determine how much "SQ" you can get out of a sub, and sub selection is lower on the list of important items. The enclosure and sub combo will determine the low end extension that can be produced and the sub/enclosure placement in the vehicle determine what you actually hear. The Sundown SA-12 can be an excellent budget SQ sub and one I may personally run in the near future (replacing an expensive sub). If you'd like to now more about why I mention Sundown, there is a good interview with the owner here where he discusses his testing procedures and what the latest version has to offer: [MEDIA=youtube]RTyl2TJdnEU[/MEDIA] Dayton Audio also makes good products for the price point. That said, JL Audio does an excellent job and their products are highly recommended. The idea that you need a sealed enclosure for SQ is a misnomer. Ported enclosures can improve/extend frequency response and increase overall enclosure efficiency. Both of which can help with SQ goals. But the placement of the enclosure determines what cancellation you will get. Consider wavelengths of interest and how the rear of the vehicle produces a reflection that can cancel the direct path. Certainly, take time to play around with placement, and don't be surprised if rear corner loading (facing into the corner) sounds the best. One good way to test is to listen to tracks with bass that "walks the scale" - meaning it varies from high to low frequencies while you listen for consistent output. If some notes are louder than others (and conversely some are quieter) then you may be hearing phase interference (cancellation or addition). [/QUOTE]
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