i bought these 6x9 to replace some infinity reference that were starting to sound bad so since i had bought a 6 1/2 component set for my 240z which sounded great ..i decided to try out the 6x9 they sounded as bad as the infinity ones did so i decided it cant be both speakers swapped out the amp to an mb quarts 4 channel and these things sounded great ,look great .... so it was my amp that was going bad but too lazy to change back tomy infinity speakers ill save those for one of my other cars ...