I bought 4 of these for my wife's car. At first I did not like how these were modeling on the box software so I decided to only use two just in case they didn't work out right or was I wrong two of these is easily equivalent to one decent 12 ported. I have these in a series tuned sixth order plays from 23 to 68 effortlessly I am truly blown away. Box specs are .74 after displacement tuned to 29 with 7.4sq in of port and 1.2 tuned to 56 with 28sq in of port. 6in ported and sealed thru the rear deck. Rap, R and B, Country it doesn't matter they are super loud on 200 watts for both. When they break in I'll give em about 750 watts. Not cleaned up up just testing.