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<blockquote data-quote="Immacomputer" data-source="post: 5095714" data-attributes="member: 570419">Clamshells can offer an increased gain due to increased loading on the drivers and transmission line/horn effects. The drivers in a clamshell pressure load each other and the line which can allow for greater mechanical power handling and increased output.Don&#039;t think of clamshells acting like a bandpass because that really isn&#039;t the case unless you mass load the end of it with a port. Clamshells will are more closely related to 1/4 wave theory enclosures than to bandpass theory. In 1/4 wave theory, you have a high pressure zone that turns into a high velocity zone. The high pressure zone is the far back of the clamshell and the high velocity zone in the mouth or opening of the clamshell. This pressure transfer can cause 1/4 wave resonances that will be based on the length and geometry of the clamshell. Long clamshells will have lower resonances (like bass tunnels and Tommy&#039;s truck) while shorter clamshells have higher frequency resonances.</blockquote>

[QUOTE="Immacomputer, post: 5095714, member: 570419"] Clamshells can offer an increased gain due to increased loading on the drivers and transmission line/horn effects. The drivers in a clamshell pressure load each other and the line which can allow for greater mechanical power handling and increased output. Don't think of clamshells acting like a bandpass because that really isn't the case unless you mass load the end of it with a port. Clamshells will are more closely related to 1/4 wave theory enclosures than to bandpass theory. In 1/4 wave theory, you have a high pressure zone that turns into a high velocity zone. The high pressure zone is the far back of the clamshell and the high velocity zone in the mouth or opening of the clamshell. This pressure transfer can cause 1/4 wave resonances that will be based on the length and geometry of the clamshell. Long clamshells will have lower resonances (like bass tunnels and Tommy's truck) while shorter clamshells have higher frequency resonances. [/QUOTE]

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