recieved my brand new,logoless,autographed rl-p 12. I had a box built for it 2 cubic ft tuned to 28hz,powered by a 1000watt RMS US amps ax1000.....****!!!!! This thing sound amazing.very detailed sound.very good at playing 2 different basses at the same time.lows are very pronounced.clearest sub I have had yet.I might have expected it to get a little louder,but I beleive with time,It will only get louder and better. I HIGHLY reccomend this sub to anyone who cares to hear their music the way it was intended to be heard.Great sub mike,I wouldnt change a thing!