Does a turntable need a phono preamp?
Every turntable needs an RIAA phono preamp somewhere in the signal chain, but not necessarily as a separate purchase. Many decks have one built in, and many amplifiers include a dedicated PHONO input with its own.
The short answer is yes, but the word need deserves unpacking. A record is pressed with a specific equalization applied: low frequencies are reduced and high frequencies are boosted so more audio fits in the groove. Playback reverses that curve through an RIAA preamp, and without that step somewhere in the chain the record will not sound as intended. So the question is never whether an RIAA stage exists, only where it lives.
[1]Where the preamp can live
- Inside the turntable. Many modern decks ship with an internal RIAA preamp and a PHONO/LINE switch that turns it on or off. With the switch at LINE, the deck can feed powered speakers directly, or plug into any ordinary line-level amplifier input such as Aux, CD or Tape.
- Inside your amplifier. Some stereo amplifiers have a dedicated PHONO input with its own built-in RIAA stage. In that case you can set the turntable to PHONO and let the amplifier do the work.
- In a separate box. If your deck outputs at PHONO level only and your amplifier has no PHONO input, you need an external phono preamp between the two. These vary widely in price and quality, so research matters because it affects the sound.
- In a DJ mixer. Some professional DJ turntables output at PHONO level only, on the assumption they will be paired with a mixer that has an integral phono preamp.
The mistake that can damage equipment
The most important practical rule: never stack two preamps. If your turntable's internal preamp is switched to LINE and you plug it into an amplifier's PHONO input, the signal passes through both equalization stages and comes out far too hot. The result is distorted audio, and it can potentially damage the speakers or the amplifier. The reverse mistake is quieter but still wrong: a PHONO-level signal fed into a line input will be very faint even with the volume turned up.
[1]A concrete comparison
Picture two buyers. One has a turntable with a PHONO/LINE switch and a pair of powered speakers with their own volume control. She sets the switch to LINE, connects, and plays. The other has the same deck but an older stereo amplifier with passive speakers. If that amplifier has a PHONO input, he sets the switch to PHONO and connects there. If it does not, he either leaves the switch at LINE and uses an Aux input, or buys an external phono preamp for better quality. Same turntable, three valid paths, decided entirely by what the rest of the system provides. Bluetooth adds one more wrinkle: the receiving device almost certainly has no phono stage, so a Bluetooth turntable's switch must sit at LINE.
[1]How to check your own setup
- Look for a PHONO/LINE switch on your turntable. If present, the deck has an internal preamp.
- Look at the back of your amplifier or powered speakers for an input labelled PHONO. If present, it has its own RIAA stage.
- Match the two: LINE output goes to line-level inputs only; PHONO output goes to a PHONO input or an external preamp.
- If you hear mains hum, try the ground connection between turntable and preamp or amplifier, with and without, and keep whichever sounds cleaner.
Before buying anything, confirm the phono stage on the specific model you are considering. The model registry here documents which of its 275 turntables include a phono stage, alongside cartridge compatibility and speed options, so you can verify the switch and inputs before you spend money on a preamp you may not need.
[2]Sources and dates
- https://www.audio-technica.com/en-eu/support/how-to-connect-your-turntable-to-speakers · accessed 2026-10-18
- https://recordplayerhub.com/ · accessed 2026-10-18