A turntable produces a PHONO output signal. This phono signal needs to be converted to a LINE LEVEL signal (sometimes referred to as AUX signal) to work with audio equipment including stereo systems, computers, and speakers. A phono preamp converts PHONO to LINE LEVEL.

What is phono and line output?

The PHONO/LINE switch turns the turntable's internal RIAA preamp off/on, thus providing the correct equalization for your turntable's current setup. ... A PHONO input on a stereo receiver has its own RIAA preamp, so there's no need for the turntable to supply one. Set the PHONO/LINE switch to PHONO.

What does phono and line mean?

If you're talking about inputs on a mixer or something, phono inputs will amplify the incoming signal with a preamp built into the mixer and line inputs will not. If you're referencing outputs on a turntable, line outputs will amplify the signal with a preamp built into the turntable, while the phono output will not.