Engl E840/50 Poweramp, stereo channels L-R, input gain switch, volume control, presence A and B controls, 2x 50W (3x ECC 83, 4x 5881), separate standby switches, 8 and 16ohms each channel, 1x foot switch jack. Dimensions: 48 x 8.8 x 30cm (H x W x D). Weight: 12 kg