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<blockquote data-quote="John_E_Janowitz" data-source="post: 6080191" data-attributes="member: 550657">Yeah I agree.&nbsp; The common thought is that more power handling = more output.&nbsp;&nbsp; In reality output is just a function of air movement.&nbsp; &nbsp; The ultra stiff, inefficient woofers just become good heaters as so much more of the power is wasted as heat in the coil.The Zapco 600W amp should be plenty for any SQ system.&nbsp; Basically my comment is that there is flat response from 15-50hz already in the case listed above.&nbsp; A single bandpass filter then would let someone pull that whole 15-50hz level straight down to match the rest of the system.&nbsp; Then it would not only be flat from 15-50hz, but also matched evenly to the rest of the system.&nbsp; The result would be flat from 15hz up to 100hz or higher.You are right.&nbsp; The cleaner the signal and the less distortion to it, the more impact.&nbsp; Take a kick drum.&nbsp; You can record the exact sound of the kick drum and if your speakers can reproduce it the same as it was recorded, it will sound the same and will retain all of the original impact, etc.&nbsp; However, if the signal is distorted, compressed, etc, it no longer sounds like the original kick drum.The AV15H has higher mass and higher motor strength.&nbsp; This will give you more output at tuning in a vented box than the X model, and will result in a peak at that point.&nbsp; Both woofers can get very loud for daily use though.In a sealed box, your low end output is primarily dominated by the enclosure.&nbsp; The next most important again is mass and motor strength.&nbsp; The H will give you more low end output in a smaller box than the X with the same input power.&nbsp; &nbsp; Overall though they are both limited to the same amount of output at a given frequency as they have the same moving area and same amount of Xmax.&nbsp; It&#039;s just a matter of what kind of enclosure volume you have available sealed.John</blockquote>

[QUOTE="John_E_Janowitz, post: 6080191, member: 550657"] Yeah I agree. The common thought is that more power handling = more output. In reality output is just a function of air movement. The ultra stiff, inefficient woofers just become good heaters as so much more of the power is wasted as heat in the coil. The Zapco 600W amp should be plenty for any SQ system. Basically my comment is that there is flat response from 15-50hz already in the case listed above. A single bandpass filter then would let someone pull that whole 15-50hz level straight down to match the rest of the system. Then it would not only be flat from 15-50hz, but also matched evenly to the rest of the system. The result would be flat from 15hz up to 100hz or higher. You are right. The cleaner the signal and the less distortion to it, the more impact. Take a kick drum. You can record the exact sound of the kick drum and if your speakers can reproduce it the same as it was recorded, it will sound the same and will retain all of the original impact, etc. However, if the signal is distorted, compressed, etc, it no longer sounds like the original kick drum. The AV15H has higher mass and higher motor strength. This will give you more output at tuning in a vented box than the X model, and will result in a peak at that point. Both woofers can get very loud for daily use though. In a sealed box, your low end output is primarily dominated by the enclosure. The next most important again is mass and motor strength. The H will give you more low end output in a smaller box than the X with the same input power. Overall though they are both limited to the same amount of output at a given frequency as they have the same moving area and same amount of Xmax. It's just a matter of what kind of enclosure volume you have available sealed. John [/QUOTE]

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