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Line Level
Definition
Line level is the analog voltage used between most stereo components before the power amplifier. Consumer line outputs (RCA) typically sit around 1 to 2 Vrms. Professional or balanced outputs can be higher.
Line level is far weaker than speaker-level output, and far stronger than a phono cartridge output. Connecting the wrong level to the wrong input causes noise, distortion, silence, or damage.
In a stereo system
Use line-level connections for:
- DAC analog outputs into a preamp or integrated amp
- Preamp outputs into a power amplifier
- Subwoofer line or LFE inputs from a dedicated sub out
Do not send speaker outputs into a line input. Speaker voltage and current can damage the receiving stage. Turntables need a phono stage before they become line level.
