im gettin a atomic apxx 18 subwoofer and im needin alot of power to make this thoing hit 160 to low 170 db's i have a escalade so im buildin a huge box for it u think i should port it? anyways im wonderin what amps i should get for it that wouldnt cost over 1000$ i wanna be able to reach 170's in db or is that possible with this sub? what amps should i run im goin to start entering alot of sound compititions around here in arkansas missiouri and tennessee