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Zane is probably the only one that would know...
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<blockquote data-quote="zane" data-source="post: 7800" data-attributes="member: 540617"><p>I realize that Alpine does specify a slightly smaller enclosure than the one I reccomended, and by building it to thier spec's you really cant go wrong- thats why these companies have R&amp;D. The enclosure volume I previously stated was arrived at by nothing more than an adventuresome afternoon with a few friends of mine.</p><p></p><p>We had 2 Type R 12's pushed by a MRV1000 and were measuring db readings with different size enclosures to achieve the best performance. The car was an 86 Buick Regal. We must have used the better part of the day cutting and bolting together different enclosures- not to mention more trips to the lumberyard for mdf than I care to mention....</p><p></p><p>All enclosures were sealed - as this was a requirement by the owner of the subs, as he wanted to keep the SQ at a decent level also, while still achieving stellar SPL.</p><p></p><p>We built enclosures from .5ft^3 (per sub) all the way up to 2.5ft^3(per sub)- we used an actual SPL meter that we had previously purchased from Radio Shack for arround $40.00. We noticed the most increase in SPL- while still recording no audible difference on the SQ side of things between 1.0 -1.25ft^3. The increase was approximately 7db's.</p><p></p><p>All Volume/Gain/Bass/Treble controls were the same each time we took the measurements to retain consistency.</p><p></p><p>This is just a successful avenue that we ventured down, so I was just passing this on so others could take advantage of it also, as I have replicated this db increase in a few installs since our initial testing.</p><p></p><p>In SPL every db counts- and being able to retain the SQ while doing so- is the added plus.</p><p></p><p>take it easy,</p><p></p><p>-zane</p></blockquote><p></p>
[QUOTE="zane, post: 7800, member: 540617"] I realize that Alpine does specify a slightly smaller enclosure than the one I reccomended, and by building it to thier spec's you really cant go wrong- thats why these companies have R&D. The enclosure volume I previously stated was arrived at by nothing more than an adventuresome afternoon with a few friends of mine. We had 2 Type R 12's pushed by a MRV1000 and were measuring db readings with different size enclosures to achieve the best performance. The car was an 86 Buick Regal. We must have used the better part of the day cutting and bolting together different enclosures- not to mention more trips to the lumberyard for mdf than I care to mention.... All enclosures were sealed - as this was a requirement by the owner of the subs, as he wanted to keep the SQ at a decent level also, while still achieving stellar SPL. We built enclosures from .5ft^3 (per sub) all the way up to 2.5ft^3(per sub)- we used an actual SPL meter that we had previously purchased from Radio Shack for arround $40.00. We noticed the most increase in SPL- while still recording no audible difference on the SQ side of things between 1.0 -1.25ft^3. The increase was approximately 7db's. All Volume/Gain/Bass/Treble controls were the same each time we took the measurements to retain consistency. This is just a successful avenue that we ventured down, so I was just passing this on so others could take advantage of it also, as I have replicated this db increase in a few installs since our initial testing. In SPL every db counts- and being able to retain the SQ while doing so- is the added plus. take it easy, -zane [/QUOTE]
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Zane is probably the only one that would know...
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