Decibel Drag racing
The mobile electronics industry is growing larger each day. A new sport is
growing within this industry. Sound Pressure Level (SPL) contests are held all over the
world to see who has the loudest vehicle. The stereotype this sport holds is of young
rebellious kids blasting their music. In the contrary, it is made up of middle-aged men
with a rising growth of women. Through the twenty years of existence the sport has
become so competitive it has turn SPL into an exact science. The three factors that
influence SPL are: equipment selection, sound propagation, and enclosure design.
Selecting the right equipment is the easiest part, yet it is the most costly. For
subwoofers you want a sub with a strong motor structure, Kevlar cone, high Xmax
(displacement), and the easiest to assume; be able to handle a lot of wattage. Second, you
want to select an amplifier that will get the most out of your sub(s).
The very first thing
you look at in an amp is to see if the lowest impedance the amp will go down to (where
the amp produces maximum power) will wire to the same ohm load as the sub. The
second is to make sure the amp is maxing out the capabilities of the sub. Common
subwoofers used in competition are: Treo, Concept, Digital Designs, ReXXX, Shocker,
and Kicker. Most of the companies listed, with the exception of Kicker, now offer a
quad-coil subwoofer that can handle up to 16k watts. This means you can wire up to 8
amps now to a single subwoofer by strapping two amps into one large amp and wiring
each pair of strapped amps to each of the 4 coils. If your system is going to compete in
endurance class or is...