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<blockquote data-quote="helotaxi" data-source="post: 2792633" data-attributes="member: 550915">Unless you have a sub with a really low Fs in a really big sealed box, you will totally hamstring its output going sealed especially in the sub bass region which is what you ant is to play in the first place.&nbsp; In most cases you will be low passing it less than 1 octave above the F3 and the peak output will be reduced by 3-6dB.&nbsp; In an SQ oriented system where the LPF is typically set even lower you will need a ton of power or cone area to get the subs to blend with the front stage.&nbsp; Enter the ported box with a boost in efficiency in the region below the F3 of the sealed and peak output is not affected by a low LPF.&nbsp; If the box is right for the sub, group delay isn&#039;t an issue either.&#039;03 model XXX 2 cf @ 28hz.&nbsp; Accurate as hell and blended quite well with my front stage running 100 watts per side.&nbsp; This was with only 400 watts on the sub.&nbsp; Response was nice and flat, too.</blockquote>

[QUOTE="helotaxi, post: 2792633, member: 550915"] Unless you have a sub with a really low Fs in a really big sealed box, you will totally hamstring its output going sealed especially in the sub bass region which is what you ant is to play in the first place. In most cases you will be low passing it less than 1 octave above the F3 and the peak output will be reduced by 3-6dB. In an SQ oriented system where the LPF is typically set even lower you will need a ton of power or cone area to get the subs to blend with the front stage. Enter the ported box with a boost in efficiency in the region below the F3 of the sealed and peak output is not affected by a low LPF. If the box is right for the sub, group delay isn't an issue either. '03 model XXX 2 cf @ 28hz. Accurate as hell and blended quite well with my front stage running 100 watts per side. This was with only 400 watts on the sub. Response was nice and flat, too. [/QUOTE]

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