...................The ((((Propper Droppers)))) SPL format - Testing @ your Peak frequency which is the loudest possible bass your vehicle can play and then at four set frequencies....40Hz.......33Hz......25Hz......20Hz................This gives us a very good idea of how well your sound system can play LOW BASS......................We use a TERM LAB SPL sensor which is currently the most accurate way of vehicle SPL testing in the world...................The SPL sensor is usually placed on the front passenger Headrest which again gives you a real world SPL reading in relation to your listening position..........................No Other SPL format in the world is like this..........................We have also introduced (((Ground Pounders))) Music SPL - 3x Different SPL tests - 1 score - Your Music...Click on Speaker image at bottom of page for more info........................

Main Page

Term LAB - SPL Testing Equipment and sensor postion which can be placed  on the passenger or drivers side.

SPL Categories

3x Main Boot Categories:
BB1: Single Subwoofers.
BB2 to 3: Two to Three Subwoofers.
BB4+: Four Subwoofers or more.

BBX: Boot Boomers Extreme - Walled boots etc.

No-Wall: No back seats - Can still see out rear window.

WALLED: A wall of subs behind your head!!!

((((Propper Droppers)))) SPL testing Frequencies:
Not only is your cars PEAK frequency (Loudest Possible Bass from vehicle) tested.
But four other set frequencies have to be attempted. These are 40Hz - 33Hz -25Hz and finally 20Hz.

Your position in the SPL leagues is worked out by averaging out the scores that have been achieved.
It is  your average score that determines your position on the streetbassers leagues.

SPL Rules & Guidelines

More info` about ((((Propper Droppers)))) can be found on the Streetbassers forum - Click on Speaker to view

(((Ground Pounders)))