# Common audio signal voltage range on Line out connector

What is typical audio signal voltage range on Line out connector of consumer electronic devices? (Vmin/Vmax) I need specify Input voltage range to calculate op-amp. Vin pk-pk, Vin Midpoint, or Vin Min, Vin Max I know the line level depends on the device type, but in general?

• Unable to google? Line Level -- Wiki. If you already read it, then you should have expanded your question. – jonk Apr 30 '18 at 19:04
• +1 for @jonk ....but many consumer products actually have a headphone out jack, which is not quite the same ....here you may find 1-100 mW or more into 32-600 Ohms. – Jack Creasey Apr 30 '18 at 19:17
• @JackCreasey Output power for headphones varies a bit from device to device. I remember seeing a table with commonly owned cell phones, for example. But delivered into the usual $32\:\Omega$ headphone, it's typically around $4-5\:\text{mW}$ if I can trust the few sources I read. This suggests a peak of about $500\:\text{mV}$, to me. Obviously, there are different amplifiers with different target headphone impedances, too. So one has to decide the target source, I suppose, if considering headphone jacks as opposed to line out connectors. – jonk Apr 30 '18 at 19:27
• Not for headphone out, I'm talking only about Line out voltage. What is Vin Midpointvoltage? – electro-tec Apr 30 '18 at 19:36