i have a 600 watt alpine amp and two 12 inch kicker comps in a 97 nissan maxima should..

[C-Rex]

...i upgrade? im wondering they sound good already but............should i add another amp or go up in subwoofers or get a better head unit.
well its not that bad i aint losing my hearing

 

[phoenix216]

sound's like you had better start saving your money for hear aide's or surgery for you hearing