Editing Line level (section)

== Line in ==
[[File:Line in symbol.svg|28px]]  &nbsp;&nbsp; [[File:Line waves03-2-in.png|42px]] &nbsp;&nbsp; [[File:Line waves03-3-in.png|35px]] &nbsp;&nbsp; [[File:Line circle in.png|35px]] &nbsp;&nbsp; Line-in symbol. [[PC System Design Guide#Color-coding scheme for connectors and ports|PC Guide color]] {{color box|lightblue}} light blue.

It is intended by designers that the line out of one device be connected to the line input of another.  Line inputs are designed to accept voltage levels in the range provided by line outputs. 
Impedances, on the other hand, are deliberately not matched from output to input. 
The impedance of a line input is typically around {{nowrap|10 kΩ}}. 
When driven by a line output's usual low impedance of 100 to 600 ohms, this forms a "bridging" connection in which most of the voltage generated by the source (the output) is dropped across the load (the input), and minimal current flows due to the load's relatively high impedance.

Although line inputs have a high impedance compared to that of line outputs, 
they should not be confused with so-called "Hi-Z" inputs (Z being the symbol for [[electrical impedance|impedance]]) which have an impedance of {{nowrap|47 kΩ}} to over {{nowrap|1 MΩ}}. These "Hi-Z" or "instrument" inputs generally have higher gain than a line input.
They are designed to be used with, for example, electric guitar pickups and "[[DI unit|direct injection]]" boxes. 
Some of these sources can provide only minimal voltage and current and the high impedance input is designed to not load them excessively.