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<blockquote data-quote="Dark Fears" data-source="post: 7796375" data-attributes="member: 642856">Actually this isnt a bs spec. Earthquake Sound is a very well respected and known company, breaking db records with their magma series subs in the 90&#039;s, I have one of the dbxi-15D&#039;s in my bimmer, and it hits extremely hard and low. I recently placed a cigarette pack 3&quot; from the center of the cone and it does indeed knock it out of my hand. There are many many videos on youtube of these types of demonstrations, people breaking cd&#039;s by holding them up against the port etc. Your amazon figures are incorrect as they do not make a dbxi 15 series for their home theater. very simple to do the research guys, watch them in action instead of spouting off.You may have been mistaken by the fact they use some of the dbxi&#039;s technology inside of the driver, but it isnt a dbxi, it is indeed a seperate unique woofer they use inside the MKVI-15I have owned manymany subwoofers over the years, and the dbxi is an incredible subwoofer.To answer the initial question more fully, the object of any speaker is to convert audio signals in the form of electrical signals into mechanical energies which produce sound/sound waves. In the case of the subwoofer mentioned, more xmax /longer throw will in theory produce higher levels of spl (sound pressure level) at lower frequencies.</blockquote>

[QUOTE="Dark Fears, post: 7796375, member: 642856"] Actually this isnt a bs spec. Earthquake Sound is a very well respected and known company, breaking db records with their magma series subs in the 90's, I have one of the dbxi-15D's in my bimmer, and it hits extremely hard and low. I recently placed a cigarette pack 3" from the center of the cone and it does indeed knock it out of my hand. There are many many videos on youtube of these types of demonstrations, people breaking cd's by holding them up against the port etc. Your amazon figures are incorrect as they do not make a dbxi 15 series for their home theater. very simple to do the research guys, watch them in action instead of spouting off. You may have been mistaken by the fact they use some of the dbxi's technology inside of the driver, but it isnt a dbxi, it is indeed a seperate unique woofer they use inside the MKVI-15 I have owned manymany subwoofers over the years, and the dbxi is an incredible subwoofer. To answer the initial question more fully, the object of any speaker is to convert audio signals in the form of electrical signals into mechanical energies which produce sound/sound waves. In the case of the subwoofer mentioned, more xmax /longer throw will in theory produce higher levels of spl (sound pressure level) at lower frequencies. [/QUOTE]

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