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Message: <blockquote data-quote="tinmanchris217" data-source="post: 6306044" data-attributes="member: 610505">Efficiency is the relationship between the acoustic power output vs. the electrical power input.  That's where the difference comes from.SPL boxes mess with the Total Q of the sub+box system.  High Q (small box) systems tend to create peaks in frequency response.  If the response peaks at +4dB, you'll easily outperform a sealed setup with bigger cone area.Even setups with low Q can outperform sealed setups, in SPL, transient response, and low freq response.  It's all about tuning the box to fit the woofer and you're vehicle.  That's why most people advocated ported... because it's the "simplest" alignment that offers significant benefits.</blockquote>

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