very great sounding dual mono classe d high end amp (icepower modules, 2 x 300w/ 4 ohms, 2x 150w/ 8 ohms). very natural sounding, excel in detail retrieval, the soundstage is wide and deep and the bass is well controlled. buy in 2008 (serial s3-409) , very few used and in excellent condition. shipped with the original double box packaging. this amp is set for 110v and sold with a good converter/transformer 110/220v (750w, 12 lbs, value 60£). more info : url and http://www.belcantodesign.com/belcanto_s300_dual_mono_amplifier.html