jcm1689 Posted June 25, 2007 Report Share Posted June 25, 2007 Thats pretty realistic. All other factors constant, SPL is a product of cone area and power. x2 if your hitting those kinda numbers off of less cone area and less power i dont see any reason why you wouldnt be able to hit 150 with the new setup. Quote R.I.P. KOOLAID KING --- Thomas Johnson 04/02/1986 - 06/09/07 THUNDER CAR AUDIO Chris's 91 hatch - 2 18" BTL's, 2 T40001BD's, 153+ dbs Chris's 2005 BMW 525i Chris's 2002 Ford Ranger 2004 Silverado Blow Through 1999 Silverado - 4 15" SSD's Fiberglass Top Infinity G20 *RIP KOOLAID KING* Dodge Stratus - 2 12" Power HX2's, Fiberglass Baffle Link to comment Share on other sites More sharing options...
sean 371 Posted June 25, 2007 Report Share Posted June 25, 2007 SPL is the result of tunning a box just right based on the accoustics of the car (xmax helps some ways, but not mainly for spl- when a subwoofer is in a box and is playing the tunning point, that is when the woofer moves the least), if you match quarter waves right with port tunning, the system will be done just right, and will get good numbers So basically you'd measure from the port to the back of the car (or whatever the air is reflecting off), and then to the windshield (or wherever the meter is), and find whatever frequency that distance is the quarter wave of? Isn't that the same as tuning to the car's resonant frequency? Quote A couple links to some box builds: Tahoe Box 1, Tahoe Box 2, Nissan Titan, VW GTI, Mini-Bump, Hummer H2, Ford F-150 My own car builds (current setup --- under construction): Overall Thread, Kickpods, Dash, Back Doors Subwoofer Wall Link to comment Share on other sites More sharing options...
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