Electronic – the typical max voltage out of a PC speaker Jack


I'm trying to use CD4051BCN chip to channel some speaker outputs from a computer. these chips handle analog voltages from +/-5V.
What is the audio line max/min Voltage coming out of the desktop PC? I just need the audio line this is without any amplification.

Would it be better to use a series of relays with higher voltage/current ratings?

Best Answer

I just measured the voltage from my smartphone headphone jack, which should be similar to what you'd get from a PC headphone jack. I got +/- 1.5v (3.0 volts peak to peak). This was not under controlled conditions with a known audio source. I would guess that the output could peak at higher than +/- 3v (6v peak to peak).