have you actually had time with a vehicle with multiple rl-ps and 3000 wrms? and time with a vehicle with an rls and 3000 wrms? to compare? there is just something about the rls to me that is screaming sick sq at really high volumes and below 60hz? (rattleing teeth?) not multiple RL-p's, but multiple TC9s (not far off) I know how my single RL-p does on 1200, can only take an educated guess as to 3 more of them, my point is that the RL-s is not made for SPL, and his main driving force behind this install is output, yes the RL-s has the capability of major output, but still a pair of RL-s have a major disadvantage to a quad of RL-ps, not to mention the RL-s needs loads of power at high ohm loads, and the cost of a pair of RL-s' plus a pair of monster amplifers to power them and the electrical system to back them up will be somewhat higher than a quad of RL-p's and a good size D class