i dont understand why so many people bash on ED they are a very succesful company and over a wide range of products at good prices.. i mean **** they even give u a percentage off if u buy a package... let me know when Fi or RE start giving 15-20% off for ordering multiple subwoofers... and back to the subject... this amp was one off amp so why would they offer a warranty... and it doestn take a rocket scientist to realized u need a good electrical setup to run the amp with dual 0awg inputs and doing 4k+