Re xxx 15 or ???

john Silver Member Username: John253a Aust. Post Number: 102 Registered: May-11	Posted on Monday, March 12, 2012 - 12:55 GMT i have 4.3 cuft including sub and port (if i use 3/4") looking to run 1200wrms any susgestions on port tuning, normaly i tune around 37hz this is for a daily driver
...Rovin... Platinum Member Username: Rovin 1 15 = 153 DBs ...Trinidad & T... Post Number: 17224 Registered: Jul-05	Posted on Wednesday, March 12, 2008 - 15:50 GMT with such a sub why tune so high shud be more like very low 30s ...
Admin Moderator Username: Admin Post Number: 10978 Registered: Dec-03	Posted on Monday, March 12, 2012 - 19:25 GMT Bumping up, because there was a date issue on the above post.
joe durkham Gold Member Username: Joe1234 Post Number: 1308 Registered: May-09	Posted on Tuesday, March 13, 2012 - 00:52 GMT John I thought you were after a 4th order. And the re xxx 15 is recommended for 4 cubic feet and 33Hz tuning. That monster sub needs a tough box.
john Silver Member Username: John253a Aust. Post Number: 104 Registered: May-11	Posted on Tuesday, March 13, 2012 - 02:49 GMT done some sums 2.9 cuft box 1.0 cuft port 0.3 cuft sub 1" mdf port 12"x12"x12" tune to 29hz sound about right
john Silver Member Username: John253a Aust. Post Number: 105 Registered: May-11	Posted on Tuesday, March 13, 2012 - 03:14 GMT joe sold the truck so no need for 4th order got myself and hsv e3 yous call it a pontaic g8 on steroids http://www.hsv.com.au/e3/GTS/
john Silver Member Username: John253a Aust. Post Number: 106 Registered: May-11	Posted on Tuesday, March 13, 2012 - 06:03 GMT
john Silver Member Username: John253a Aust. Post Number: 110 Registered: May-11	Posted on Tuesday, March 13, 2012 - 12:37 GMT if i tuned to 35 with 12x12x8 port ill get around 3cuft
joe durkham Gold Member Username: Joe1234 Post Number: 1310 Registered: May-09	Posted on Tuesday, March 13, 2012 - 20:00 GMT I did a box for a RE XXX 15" recently, it meets Re Audio spec, take a look: Enclosure Specifications: Fb = 33 Hz Vb = 4.013 ft^3 External Height = 16.5 in External Width = 35.75 in External Depth = 20.5 in Port Width = 4 in Cut Sheet List: * All Dimensions in Inches. * Wood Thickness is 3/4 for all Parts. External Enclosure Parts: 2 x Front & Back (3 parts) = 35 3/4 x 16 1/2 Left & Right Sides = 18 1/4 x 15 Top & Bottom = 35 3/4 x 18 1/4 L Port Internal Assembly Parts: Front to Back = 14 1/4 x 15 Extension = 8 1/4 x 15
john Silver Member Username: John253a Aust. Post Number: 111 Registered: May-11	Posted on Tuesday, March 13, 2012 - 23:21 GMT So port length is 15x4x26"long Ill run it throught winisd and see how close it is to what i can fit I can go out a bit more on box but i still want a box I work your out to be close to 5.6cuft no port/sub So my 4.3 is a bit shy Any recomendations on port size for my odd shaped box Unless i run port accross front and out front i cant go bigher then 14" high and 14" long width is no ploblem It would like going in 4" and accross 20" and back again 8" and 15" high with the opening at front An s shaped port Ill draw it up when i finish work and show you
joe durkham Gold Member Username: Joe1234 Post Number: 1313 Registered: May-09	Posted on Wednesday, March 14, 2012 - 11:37 GMT WinISD can do square ports but slot ports require end correction calculations in most cases. The box I left you has 4 cubic feet of internal volume not 5.6. Does that box you are planning on need to be that shape?
john Silver Member Username: John253a Aust. Post Number: 114 Registered: May-11	Posted on Wednesday, March 14, 2012 - 12:37 GMT yes it does to fit behind back seat and under back parcel shelf, if i go out any further i wont be able to access batteries and spare tyre as the factory battery is located in rear wheel arch well inside boot

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