to be really honest, i dont think it sounds that good. the installer didnt even know which way he set up the subs, ohm wise. the subs sound like they pop the instant the bass hits, when i turn it up and the subs start to pop they ,then shut off. the subs are facing up towards the roof. I am thinking off facing them back towards the rear window. Now the highs for being MB quarts dont sound all that impressive either, they sound muffled. not real crisp. i am dissapointed right now, i hope that this is all in the tuning. If it isnt i dotn know what to do next, except not crank it up. ( not what i bought it for).. any in put is needed thanks