Sony Amplifier XM-502Z. Signal-to-Noise Ratio (SNR): 100 dB, Frequency response: 5 - 50000 Hz. FM band range: 87 - 108 MHz. Weight: 1900 g. Output power (DIN): 2 x 100, Dimensions (WxDxH): 262 x 173 x 53.5 mm, Output power: 15A