if anyone wants to test there system 5$ for a half and hour it is the same meter as cbr and it is the calibrated judges meter for meca and nspl also i will build a box design for your vechile for 10 dollars and any price cbr gives you i will under cut it i build custom boxes no carpet for 120 that includes the material if it does not hit then i will give you all your money back that i kept for labor supplies are none refundable. if you want carpet than 150.00 for the box if you want a box the design is free and i will show you how it is designed on the computer. sound xtreme car audio also does alarms,fiber glassing, body kits, car audio and video. # is 757-761-4029, 757-399-3322 ask for james or tim. If you get a quote from another dealer come see us see if we can beat it all other quotes have to be in writing thankyou for your time.