CD player section Signal-to-noise ratio 90 dB Frequency response 10 – 20,000 Hz Wow and flutter Below measurable limit Tuner section FM Tuning range 87.5 – 108.0 MHz Aerial terminal External aerial connector Intermediate frequency 10.7 MHz/450 kHz Usable sensitivity 9 dBf Selectivity 75 dB at 400 kHz Signal-to-noise ratio 67 dB (stereo), 69 dB (mono) Harmonic distortion at 1 kHz 0.5% (stereo), 0.3% (mono) Separation 35 dB at 1 kHz Frequency response 30 – 15,000 Hz MW/LW Tuning range MW: 531 – 1,602 kHz LW: 153 – 279 kHz Aerial terminal External aerial connector Intermediate frequency 10.7 MHz/450 kHz Sensitivity MW: 30 μV LW: 40 μV Power amplifier section Outputs Speaker outputs (sure seal connectors) Speaker impedance 4 – 8 ohms Maximum power output 50 W × 4 (at 4 ohms) General Outputs Audio outputs (front) (CDX-CA680X only) Audio outputs (rear) Power aerial relay control terminal Power amplifier control terminal Inputs Telephone ATT control terminal Remote controller input terminal BUS control input terminal (CDX-CA680X only) BUS audio input terminal (CDX-CA680X only) Tone controls Low ±10 dB at 60 Hz (XPLOD) Mid ±10 dB at 1 kHz (XPLOD) High ±10 dB at 10 kHz (XPLOD) Power requirements 12 V DC car battery (negative ground) Dimensions Approx. 178 × 50 × 180 mm (w/h/d) Mounting dimension Approx. 182 × 53 × 161 mm (w/h/d) Mass Approx. 1.2 kg Supplied accessories Parts for installation and connections Front panel case (1)