the bazooka looks cool and it's pretty cheap. i looked it up and it says it's powered. maybe no need for an amp?
They make two versions, one with a built-in amp and another without.
Left Front Speaker Positive Wire (+): White
Left Front Speaker Negative Wire (-): White/Brown
Right Front Speaker Positive Wire (+): White/Violet
Right Front Speaker Negative Wire (-): White/Orange
Left Rear Speaker Positive Wire (+): White/Green
Left Rear Speaker Negative Wire (-): Brown/Yellow
Right Rear Speaker Positive Wire (+): Brown/White
Right Rear Speaker Negative Wire (-): Brown/Blue
You can use a Speaker RCA Line Level Converter to send signals to your amp.