i got the boston pro 12LF in a custom made box for my car in my car a 1994 saturn sc2 and powering at the moment with a RF Power series 222.5 bridged at round about 500watts and when i turn it up i get dissturtion is it because it would be under powered ? or is because of the box causeing dissturtion ? i would say i have enought power... it's a 1200watt peak sub