Connecting a Turntable to Powered Speakers: Phono or Line?

Check your powered speakers for a phono input

Before you buy anything, look at the back panel of your powered speakers. Powered speakers include their own amplifier, so they accept a line-level signal directly. Some models also add a phono input, which contains a small phono preamp and accepts the very low level signal from a turntable cartridge directly. The input is usually labeled PHONO.

If your speakers have a phono input, connect the turntable's phono output to it with a pair of RCA cables. Confirm that the turntable's built-in preamp, if it has one, is switched to the phono position. Sending a line-level signal into a phono input adds extra gain and equalization, which produces a distorted sound. When both sides offer the right signal path, this setup needs no extra equipment.

A phono input expects the low-level signal produced by a cartridge, which is on the order of a few millivolts. A line input expects a signal around a half volt, so the two are not interchangeable without the right compensation. The RIAA curve is the international standard that defines how the phono stage boosts the high frequencies and restores the low frequencies. If you do not apply that curve, the sound will be thin and bass-light. Most phono inputs include that equalization automatically, and external preamps do as well. For more on what a phono stage does, see what is a turntable phono stage.

Use the turntable's built-in preamp when it has one

Most current turntables include a built-in phono preamp that lifts the cartridge signal to line level and applies the RIAA equalization curve. With the preamp active, the turntable's RCA output behaves like any other line source, so you can connect it to a line input on powered speakers without anything in between.

Look for a switch labeled PHONO and LINE, or ON and OFF, on the back or underside of the turntable. Set it to LINE for a speaker with no phono input. Make the switch choice before connecting, because the wrong position either leaves you with a very quiet signal or pushes an amplified signal into a phono stage that expects a much weaker one. For a deeper comparison of where a phono stage can live, see phono preamp versus receiver phono input.

Add a separate preamp when neither side has one

When the turntable has no built-in preamp and the speakers have no phono input, the answer is an external phono preamp placed between them. Connect the turntable's phono output to the preamp input, then run cables from the preamp output to the speakers' line input. The preamp supplies the gain and equalization that the other two devices lack.

A separate preamp is also a sensible upgrade path. Many units let you switch between moving magnet and moving coil cartridges and offer adjustable loading for more advanced setups. If you plan to upgrade your cartridge or tonearm later, keeping the phono stage outboard leaves you free to change components without touching the turntable or the speakers.

The RIAA curve is the standard for vinyl playback, and both built-in and external phono stages apply it correctly. By adding a separate unit, you also gain more control over the signal path, which can make a noticeable difference in clarity and noise floor when you pair it with a high-resolution cartridge.

Grounding and cable notes

Turntables with a phono output usually include a ground wire. Connect it to the ground terminal on the preamp or on the speaker's phono input to reduce hum. If you use the line output from a built-in preamp, grounding is often handled internally, but a low hum can still appear; connect the ground wire to a terminal if one is available. See how to ground a turntable for the details.

Good cable handling matters at phono level, where the signal is small. Keep the cable run short, avoid routing it parallel to power cords, and use well-shielded RCA cables. Handling records cleanly helps too: the Library of Congress recommends holding grooved records by the edge and label areas only and storing them upright on shelves with sturdy dividers every 4 to 6 inches.

When the speakers are wireless only

If your powered speakers have no analog inputs at all and only accept a wireless signal, you need a turntable that transmits audio over Bluetooth. Bluetooth Classic is the radio protocol used for wireless audio streaming, and it supports point-to-point connections between a source and a speaker. The turntable's internal phono stage prepares the signal, and the wireless transmission carries the finished audio to the speaker.

Wireless transmission is the easiest route when you have no line input, and it pairs naturally with speakers that were designed for streaming. For turntable options with built-in transmitters, see best Bluetooth turntables. For the full picture of how turntables connect to the rest of a system, see turntable connectivity options.

What to pick for your use

Questions

Can I plug a turntable into any powered speaker?

Only if the speaker has a phono input, the turntable has a built-in preamp set to line, or you add an external phono preamp. A phono-level signal into a line-only input will be very quiet because the speaker's amplifier expects a much stronger signal.

What happens if I plug line level into a phono input?

The phono input applies extra gain and the RIAA equalization curve, so a line-level signal will be loud and distorted. Set the turntable's switch to the phono position when using a speaker phono input.

How do I know if my turntable has a built-in preamp?

Check for a switch labeled PHONO and LINE, or ON and OFF, on the back or underside. A switch means the turntable outputs both phono and line level. If there is no switch, the output is phono level only and needs a phono stage downstream.

Do I still need a ground wire when using a built-in preamp?

Usually not for the line output, because the preamp handles grounding internally. If you hear a hum, connect the ground wire to a ground terminal on the preamp or on the back of the speaker if one is provided.

Can I use Bluetooth speakers with a turntable?

Yes, if the turntable has Bluetooth. Bluetooth Classic supports point-to-point wireless audio streaming between a source and a speaker, and the turntable transmits the finished line-level audio. This works best when the speakers have no analog inputs.

Do I need a receiver if I have powered speakers?

No. Powered speakers contain their own amplifier, so they do not need a separate receiver or integrated amplifier. You only need a phono stage somewhere in the chain before the line input.