A turntable can have the same RCA connectors as another audio source and still need a different input. Understanding phono and line level helps prevent weak playback, excessive gain and confusion when building a vinyl system.
What a phono stage does
A conventional turntable cartridge produces a small signal. A compatible phono stage raises that signal to a level the rest of the system can use and applies the equalization needed for record playback. An ordinary line input does not perform those functions.
Some turntables include a switchable phono stage. Others rely on one built into an amplifier or on a separate unit. Check the documentation for your exact model.
Choose the correct signal path
If a turntable’s built-in phono stage is enabled and its output is set to LINE, connect it to a suitable line input, such as AUX. If its output is set to PHONO, use a compatible phono input or an external phono stage before the line input.
Sending a phono signal directly to a line input usually produces very low, thin playback. Sending an already amplified line signal through another phono stage can cause excessive gain and an incorrect tonal balance.
Check cartridge compatibility
Phono stages are not universally compatible with every cartridge. Moving magnet and moving coil cartridges can require different gain and loading. Confirm the supported cartridge type and follow the cartridge and phono-stage specifications.
Where the equipment provides a grounding connection, follow its installation instructions. Keep the turntable stable and the cables arranged without tension on the connectors.
Complete the setup mechanically
Electrical connections are only one part of playback. Set tracking force and anti-skate as instructed, use the correct speed and keep the stylus and records clean with suitable methods. A properly connected system still depends on correct cartridge setup.
Before purchasing another component, trace the complete path from cartridge to speakers. Knowing where the phono stage sits makes it much easier to choose equipment that works together.