produces very good quality! I was fortunate recently to find two brand new boxes in stock (ultra rare!) in a music store. these models were made in Italy and not "made in china", so proof of quality to 200%. it's solid, the bass is very deep, well rounded, it sounds great, connectivity is parfate (XLR male / female). for those who make electronic music, well you'll be pleased .. I have associated with 2 head "RCF" 525 A (750 watts) and believe me it gives off! not worth having Subwoofers oversized or too powerful, these models are an ideal place with HP minimum power of 400 watts +.