Very powerful power amplifier from Sharp. This digital amplifier is able to deliver a lot of power and can steadily control a large speaker. The amplifier is stripped of the default trigger connector making it now usable in each set. Possibility to connect two speaker sets. The amplifier is checked by the technical service and the speaker relays are cleaned. Optical amplifier has some small user traces including a small dent on the back (see picture) but this is all not really disturbing. I mentioned it there for the sake of clarity. Sharp System 7700 specifications 2 x 200 watts at 4 ohms 2 x 160 watts at 8 ohms 4 x 100 watts at 4 ohms 4 x 80 watts at 8 ohms Dimensions: 430 mm x 210 mm x 358 mm Weight: 11 kg