Luda Posted November 20, 2006 Report Share Posted November 20, 2006 Im building a box soon wofr my two alpine Type Rs. and i would like some more input on how to go about this. Im looking @ about 2.5CUFT before displacement. somewhere around 2.2 after. this is per sub. so the total box will be about 4.4CUFT after displacement. im thinking of 80in per sub of port tuned to 28HZ. now is 28 to low for these subs? how would i figure out what the optimum port freq would be? i have all t he T/S specs.. i just dont know what all of them mean. and then any other hints of building a good loud box? 2005 Grand PrixSource: StockFronts: Stock 6.5 ComponentsRears: Stock 6x9Subwoofer: FI BTL 12" Fully optionedSubwoofer amplifier: Kenwood KAC-7203 bridged @ 4ΩEnclosure: 3.41cuft tuned to 33hz Link to comment Share on other sites More sharing options...
Grtrat1 Posted November 20, 2006 Report Share Posted November 20, 2006 Why do you want to tune soo low? Most bass songs are using between 35 and 40hz notes. Most of the pros here will tell you to tune it around 34 or 35 hz. Link to comment Share on other sites More sharing options...
SPLGEO Posted November 20, 2006 Report Share Posted November 20, 2006 The box I had for mine was was 2.7 before dis. 2 4" areo ports (www.partsexpress.com) tuned to 31hz for awile.. it hit but i tuned it up.. until i got rid of everything.. to about 40 hz.. and It was great for everything. 1995 Geo Prism . FI BTL 12 P chamfer, 3rdmagnet HIXMAX COIL 1/0 big 3 HIFONICS COLOSSUS 1.7 cubs tuned to 60hz in the works 2xTruck battery 1125 cca. Link to comment Share on other sites More sharing options...
Luda Posted November 23, 2006 Author Report Share Posted November 23, 2006 i just analyzed alot of my library and 34hz look like a good freq. 2005 Grand PrixSource: StockFronts: Stock 6.5 ComponentsRears: Stock 6x9Subwoofer: FI BTL 12" Fully optionedSubwoofer amplifier: Kenwood KAC-7203 bridged @ 4ΩEnclosure: 3.41cuft tuned to 33hz Link to comment Share on other sites More sharing options...
SoloKicker Posted November 24, 2006 Report Share Posted November 24, 2006 keep that size and port area, and tune between 33 and 37, my 15's are at 36 and i love it. Link to comment Share on other sites More sharing options...
stratusrt01 Posted November 24, 2006 Report Share Posted November 24, 2006 did you say 80 square inches of port per sub? IMHO, that's way too much per sub. I would give each sub about 40 square inches, 80 if you only do one port for both subs would be fine though. Link to comment Share on other sites More sharing options...
Dale Posted November 25, 2006 Report Share Posted November 25, 2006 Talk to Ray. He could design one for you. But, it will cost you He'll also tell you that 28 Hz is a tad low. Link to comment Share on other sites More sharing options...
SoloKicker Posted November 25, 2006 Report Share Posted November 25, 2006 yeah 30- 40 sq in PER sub Link to comment Share on other sites More sharing options...
Luda Posted November 25, 2006 Author Report Share Posted November 25, 2006 I was talking 80 sqin total. I am running 2 separate amps, 1 per sub. so should i do a dual chamber box and a port per sub, or would a 1 chamber with a shared port still be good? and im thinking about tuning to 35hz, since alot of the songs i listen to are around dbs there. 2005 Grand PrixSource: StockFronts: Stock 6.5 ComponentsRears: Stock 6x9Subwoofer: FI BTL 12" Fully optionedSubwoofer amplifier: Kenwood KAC-7203 bridged @ 4ΩEnclosure: 3.41cuft tuned to 33hz Link to comment Share on other sites More sharing options...
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