inputs.text: sub sounds great hits hard - initially jbl gto804 installed powered jbl gto501ez amp operated 300w 4ohm sub sounded ok low volumes tried cranked volume even halfway could hear sub bottom pretty badly swapped sundown sub box amp although voice coils wired parallel amp putting 500w 2 ohms sundown comparison night day sub puts seehemingly bottomless bass shaking not mirror whole body sub says rated 300w handles 500w amp fine even high volumes downside found every rattle car suppose means mission accomplished sub time find dynamat overall totally pleased best sub ever owned worth every pennymy complaint cannot find fault sub relative newbie would nice sub ship instructions wire voice coils took minutes internet searching find good tutorial