By far, if you are looking for a sub that is going to give you a deep competition bass, but still keep good sound quality, then this is the sub. It is nicely priced also. Currently in Madera CA at Sound Unlimited(Nations top lanzar dealer), they are almost at world record with these subs in a 80's series Cutlass.(8 of these Opti's, matched up wit 8 Opti 1400D's- bridged at 1.3 ohms =22,000watts). If you want more SPL, go with this sub, if you want more clear bass, go with the silver aluminum OptiDrive woofer.