just bought this NEW in february 2016, year of production probably 2014. nicely worked, good quality surface and buttons. just tested it about 2 hours with 2 pairs of very good speakers. one should forget the "30 watts" labeling, as this little amp really shines - as long as you use rather efficient speakers (efficiency 87 DB or more). if you don't see what's playing - you could believe listening to a 1000 $ amp ! bass is well behaved, quite precise and tuneful if not the last word in depth. mids are neutral, with a slice of added warmth. and highs come fullbodied, summing up to an alltogether very musical, natural sounding, versatile and enjoyable experience. imaging not with the best but satisfactory for the price. best suited for classical, hand made pop and rock and jazz as well. not ideal for techno and other artificial stuff. price / quality relation is unbelievably good !!! around 400 $ (new).