Ported Enclosures

aLeXv305 Bronze Member Username: Alexv305 Tavernier, FL USA Post Number: 99 Registered: Oct-05	Posted on Tuesday, April 25, 2006 - 15:51 GMT When designing a ported enclosure, how many square inches of space do I use in a port? on ROE it says to use 50 SQ IN, but would it be safe to use more or less?
WrEaK HaVoC(.'~DAYE£?~'.) Gold Member Username: 54danny54 Betsy layne, Kentucky..GO... USA duh Post Number: 2219 Registered: Nov-04	Posted on Tuesday, April 25, 2006 - 15:52 GMT depends on the sub and cubic foot of ya enclosure
aLeXv305 Bronze Member Username: Alexv305 Tavernier, FL USA Post Number: 100 Registered: Oct-05	Posted on Tuesday, April 25, 2006 - 15:56 GMT Is there some sort of rule to determine now much space you need per cubic inch of total enclosure volume or something?
marshall white Gold Member Username: Southernrebel Monroe, Louisiana USA Post Number: 2750 Registered: Mar-04	Posted on Tuesday, April 25, 2006 - 16:01 GMT a decent rule is 10-14sq inches of port per net cuft of box went using slot-ports ex...3cuft net box---~30sq inches. this when tuning for daily drivin though (30-38hz)...tuning for SPL it totally different. in some cases, bigger isnt alway better for SPL hint-hint
aLeXv305 Silver Member Username: Alexv305 Tavernier, FL USA Post Number: 103 Registered: Oct-05	Posted on Tuesday, April 25, 2006 - 16:05 GMT yea i know that a smaller port tunes the enclosure to a higher freq, i jus needed to know how to design a ported enclosure so it sounds right the first time. lol i dont want to have to rebuild it two or three times. also what tuning freq should i use on alpine type r 12s and treo tsx 12s. both are going to be used for SQL..
aLeXv305 Silver Member Username: Alexv305 Tavernier, FL USA Post Number: 104 Registered: Oct-05	Posted on Tuesday, April 25, 2006 - 16:06 GMT ^^I meant shorter port with same length and width..just a shorter depth a smaller port in general will cause the whistling effect.
marshall white Gold Member Username: Southernrebel Monroe, Louisiana USA Post Number: 2752 Registered: Mar-04	Posted on Tuesday, April 25, 2006 - 16:16 GMT for daily driving...i would recommend ~2-2.25cuft tuned to 32hz w/ ~20-24sq inches of port....per sub. maybe alil smaller box for the R's...like 1.8-2cuft maybe) if you do a single chambered box w/ 2 12's...try 4.25cuft w/ 42sq inches of port. (tune to 32hz)

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