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<blockquote data-quote="winkychevelle" data-source="post: 7629527" data-attributes="member: 611804">quick question. when i normally port a box i use a minimum 4 inch port. but in my current case im porting a pre-existing truck box. if i use a 3 inch port for the 1.07 cube box i can tune to 30 hz no prob. but i can only only achieve a 30 hz tune and keep the same volume.now this is a 2012 p3 shallow 10 and rockford recommends 1 cube ported to 47hz with a 4 inch port 12inches long now i know this is not optimal for my listening preferences.since this is a low excursion sub i figure i can skimp by with a 3 inch port. even if i have to sacrifice output id rather tune it lowand i have talked to rockford directly bout tuning the sub low. they just stated that i would lose output which i can live with if i can keep the sub from interfering with my mids around 70-80hz which i can do now with my 24db slope crossover but i cut out pretty much all the bassi have a good bit of power on tap considering the subs only rated at 300rms and really doesnt need that imho.opinions? this is a rockford employee order so im getting a good deal on all of this. the only other sub i will consider is the stereo integrity bm shallow which are darn near impossible to get.sorry for the long read</blockquote>

[QUOTE="winkychevelle, post: 7629527, member: 611804"] quick question. when i normally port a box i use a minimum 4 inch port. but in my current case im porting a pre-existing truck box. if i use a 3 inch port for the 1.07 cube box i can tune to 30 hz no prob. but i can only only achieve a 30 hz tune and keep the same volume. now this is a 2012 p3 shallow 10 and rockford recommends 1 cube ported to 47hz with a 4 inch port 12inches long now i know this is not optimal for my listening preferences. since this is a low excursion sub i figure i can skimp by with a 3 inch port. even if i have to sacrifice output id rather tune it low and i have talked to rockford directly bout tuning the sub low. they just stated that i would lose output which i can live with if i can keep the sub from interfering with my mids around 70-80hz which i can do now with my 24db slope crossover but i cut out pretty much all the bass i have a good bit of power on tap considering the subs only rated at 300rms and really doesnt need that imho. opinions? this is a rockford employee order so im getting a good deal on all of this. the only other sub i will consider is the stereo integrity bm shallow which are darn near impossible to get. sorry for the long read [/QUOTE]

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