i had 2 of the "760 watt" pioneer gm-x962 i believe. rated 380x1@4ohm mono @12v and 530x1@4ohm mono @14.4v. they did their job. they got hot numerous times and 1 time 1 went into protect. i sold them both after 2 years of abuse to a friend and they are still goin. not bad for 100 bux each i suppose.