General Power source .......... 14.4 V DC (10.5 – 16.0 V allowable) Grounding system ........................................ Negative type Weight ...................................................................... 1.1 kg Amplifier Maximum power output (SCU-2456ZRN) ................ 15 W (SCU-2556ZRN) ................ 40 W Rated power output (SCU-2456ZRN)........................ 10 W (SCU-2556ZRN) ...................... 15 W Load impedance .......................... 4 Ω (4 – 8 Ω allowable) FM tuner Frequency range ...................................... 87.5 – 108 MHz Usable sensitivity .................................................... 10 dBf (1.0 μV/75 Ω, mono, S/N: 30 dB) 40 dB quieting sensitivity ........................................ 13 dBf (1.7 μV/75 Ω, mono) Signal-to-noise ratio ..................................More than 50 dB Distortion ......................................................Less than 1.5% Stereo separation ......................................More than 20 dB MW tuner Frequency range ........................ 531 – 1,602 kHz (9 kHz) Usable sensitivity .............................. 29dBμ (S/N: 20 dB) Renault Espace and Avantime SYSTEM CONTROL UNIT Selectivity ................................................More than 45 dB LW tuner Frequency range ........................................ 153 – 281 kHz Usable sensitivity .............................. 33dBμ (S/N: 20 dB) Selectivity ................................................More than 45 dB