inputs.text: excellent quality amplifier - 2005 f150 extended cab truck wanted improve sound aftermarket radio replacement door speakers searched internet purchasing 10 subwoofer suitable enclosure still needed good quality amplifier reasonable price amplifier highly rated power perfect match single 10 subwoofer priced amazon 20 less anywhere else along free shippingi no need rattle windows anyone else hear block away end result really great full range sound interior truck extremely pleased system would recommend anyone wants enjoy good quality sound vehicle