RCA audio Line voltage?

[davidflana]

Hey all!
I am working on a project that would benefit from knowing what to expect from an audio input.  As such, we are planning on using the typical aucio "line in".  I was under the impression that this would be a voltage between 1 and 1.3volts peak to peak...  Howver, I have heard conflicting information now, and I need to know once and for all:

Is there a standard voltage range that manufacturers of audio equipment (both car and home) stay within for the "line" so that their equipment can feed other devices such as amplifiers?

Thanks!

Dave

 

[audioguru2]

Hi Dave,
There isn't a standard because how loud is loud? One manufacturer doesn't care about working with something from another manufacturer.

Most music sources for home stereo equipment have a line output of 100mV to 300mV RMS for the loudest. That is 283mV p-p to 848mV p-p.
Car amplifiers have a line input and frequently also have Speaker input that has a much higher level, about 2V RMS or 5.7V p-p.