Line-level, also called low-level, is an audio signal at a relatively low voltage used to transfer audio between devices, too weak to drive a loudspeaker without amplification.
Line-level signals carry audio at a relatively low voltage suitable for transferring between equipment such as mixers, processors, and source devices. These signals contain the full audio information but lack the power to drive a loudspeaker, so an amplifier is required to raise them to speaker level. Line-level connections are the backbone of how audio moves through a system before amplification.
In commercial and professional audio systems, keeping line-level signals clean is critical because any noise introduced at this stage is amplified along with the signal downstream. Shielded, low-noise cable is used for line-level runs to reject electromagnetic and electrostatic interference, preserving audio quality between devices. The quality of these connections has an outsized effect on the clarity of the final output.
Standard reference levels define what nominal line-level should be, allowing equipment from different makers to interconnect predictably, and keeping the cable runs short and well shielded helps the signal arrive at the amplifier close to that reference.
At Windy City Wire, the focus on shielded, low-noise audio cable supports the line-level connections that commercial audio systems depend on. Supplying cable that rejects interference helps ensure that audio reaches the amplifier cleanly, so the sound delivered to the speakers stays clear and faithful to the source.
Also called low-level