The Line-Out signal has the highest sound quality. The output level of the sound signal has a fixed value and is independent of the setting of the volume control and the equalizer. This has the advantage that the recording level is always the same, which allows the line-out signal to be connected directly to recorders and other audio recording devices without having to pay attention to the volume.
The output impedance of the line-out is low impedance and is 600 ohms, and the effective output voltage is 775 mV. This corresponds to a level in decibels of 0 dBu (Decibel Unloaded) and an effective power of 1 mW. The peak output voltage is 2 V. The frequency response is flat over the entire audio range from 20 Hz to 20 kHz. Level deviations are less than -3 dB over the entire frequency range. The low-impedance line-out output with its internal resistance of 660 ohms can be connected to the high-impedance line-in input.
Line-Out outputs are color-coded like the other analog audio interfaces, the Line- In input and the Mic-In input: Line-Out is light green, Line-In in light blue, and Mic-In in pink. All of them have jack plugs. There are also audio devices and sound cards with RCA plugs. The plug configuration can be adapted to user requirements at any time using RCA jack adapters.