cabin will make them sound the best, the most air space for them to work in.

Have a 303 when Igot it it had a single 12 in center of bench with 2 6 1/2s on the side of the bench with tweeters up front I just added 2 10" subs in side panels by feet if in front seat and am adding 2 6 1/2 in side panels up high to get some highs up. Running the 12 by itself on one amp and the rest on a 4 channel amp