How to connect a phono preamp

Written by james clark
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How to connect a phono preamp
Connect a turntable to a preamp to boost the record's audio signal to an acceptable level. (close up of professional DJ's turntable image by TEA from Fotolia.com)

A phono preamplifier (preamp) connects to a turntable to boost the audio signal from a record so it can be processed on newer audio-video receivers for playback. New AV receivers may not have a dedicated set of turntable jacks. Instead, AV receivers accept the line-level signal from CD players and amplifiers, which does not require equalisation or a significant power boost. Turntables need extra amplification, which is why a preamp is needed to work with receivers that do not have a dedicated set of turntable jacks. Standard stereo cables are needed for the connection.

Skill level:
Easy

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Things you need

  • 2 sets of stereo cables with a pair of 1/4-inch plugs on each end

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Instructions

  1. 1

    Connect the white and red plugs on each end of a stereo cable from the left and right audio output jacks on the turntable to the left and right audio input jacks on the back of the preamp.

  2. 2

    Unscrew the "GRND" ("Ground") knob on the back of the preamp, then wrap the end of the single black wire on the back of the turntable to the metal post and tighten the "GRND" knob to secure the wire. This prevents the low-frequency hum from the turntable cartridge from interfering with the music.

  3. 3

    Plug a second set of stereo cables from the left and right audio output jacks on the back of the preamp to a set of input jacks on the back of an AV receiver. Any pair of available jacks will work for the connection; just remember which set of jacks is connected to the preamp.

  4. 4

    Set the component selector control on the receiver to the set of jacks that connect to the preamp. For example, if the cable from the preamp is connected to the jacks labelled "Tape 1" or "Auxiliary," dial the selector knob on the receiver or press the receiver remote control button for "Tape 1" or "Auxiliary" to activate the connection.

Tips and warnings

  • Connect the stereo cables before plugging any component into the electricity.

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