it really doesnt change the tone, and it also really doesnt lower the volume "THAT" much. it does however slightly muffle/ take away the crackles and crisp sounds that the car makes during engine breaking, and acceleration. Its pretty hard to describe sounds! and im not sure if you know what i mean by crackles, and crispness!!!!! ha ha ha... im not talking about the popping that the subarus make though. oh well,, i hope this made sense!!!! uhhhhhh it muffles it slightly!
ha ha ha