So to stay in the mold ... I use these subwoofers for 5 years, providing many and varied (festival, theater, conference ...). I have quite a different system on the Park (HK, Martin, Bose ...) but within the limits of its power (600 watts) I think this sub is at the top: severe percuttant round but if necessary, good management power, no harmful vibration (good case). No complaints really. May be the weight (but not for nothing). Using the built-in crossover nice (appropriate choice of cuts) is to my mind an Excellent product, whose price is right pout quality. Without any hesitation if I had to buy again I will opt for the same system.