Obviously this does not preclude the use of Grand Opera Mezza 2012 with even the most extensive and powerful amplifiers (up to over 200 Watts RMS per channel) provided the amplifier is of good quality and is protected against excessive clipping.The Opera Grand Mezza 2012, compared to the previous 2007 model, has been completely revamped. It is a floor-standing three-way column speaker that is reflex loaded. There are two 5″ long-throw SEAS woofers with polypropylene cones and a 5” SEAS midrange driver. The cones are made from double-treated paper. The tweeter, by Scanspeak, is the same we use on the more expensive Seconda and Quinta 2011 models. Impedance for the Grand Mezza is a nominal 4 ohms.The Opera Grand Mezza 2012 is a comprehensive and versatile speaker system suitable for the most demanding musical programs, and it can be used in sophisticated home theater systems as well.