MingDa MC368-B902 MingDa MC368-B902 Integrated Amplifier 1.499 USD 2x 16W, single ended 1x 274B rectifier, 2x 6N8S/6SN7 pre and 2x KT90 power valves. 3 line inputs Transparent, detailed, powerful sound from the potent KT90 tetrodes in single ended configuration.