Phono or line? Where does that little ground wire go? Why is there hum? Wiring turntables trips up even experienced DJs. This guide shows you how to connect turntables to a DJ mixer cleanly, with no hum and no confusion.
We will cover phono versus line inputs, the ground wire, fixing hum, DVS routing, and final checks.
Phono versus line inputs
Turntables output a very weak signal called phono level, which must be boosted by a phono preamp before it sounds right. Plug your turntables into the mixer's phono inputs, not line inputs.
If you use line inputs by mistake, the sound will be faint and thin because the signal has not been amplified. Most DJ mixers have dedicated phono inputs and a phono/line switch per channel.
Getting this right is the first step to clean, full-volume turntable sound.
Some turntables include a built-in phono preamp with a line/phono switch, in which case you can use line inputs, but for most DJ decks the phono input is the correct choice.
The ground wire
Each turntable has a thin ground wire, usually with a spade connector. Attach it to the mixer's ground terminal (a small screw post) to eliminate the annoying hum that plagues ungrounded setups.
This simple connection is the most common fix for turntable hum. If you hear a low buzz, a disconnected or loose ground wire is the usual culprit.
Always connect the ground wire before judging your setup's sound.
If your turntable lacks a ground wire, a metal part of the chassis can sometimes serve the same purpose, though a proper ground connection is always the more reliable fix.
Fixing hum and noise
If hum persists after grounding, check that cables are fully seated, keep power cables away from audio cables, and ensure your turntables and mixer share a clean power source.
Cheap or damaged RCA cables can also introduce noise, so use quality leads. Methodically checking each connection usually tracks down the source of any hum.
A clean, hum-free signal is well worth a few minutes of careful checking.
Using shorter, good-quality RCA cables also reduces the chance of picking up interference, which is especially helpful in setups crowded with other electronics and lighting.
Routing for DVS
For a DVS setup, you feed the turntables through a DVS interface or DVS-capable mixer rather than straight to a standard channel. Set the inputs to phono and configure the software's DVS settings.
The interface reads the timecode and routes your digital tracks accordingly. Correct routing and calibration ensure the software tracks your hand movements accurately.
This is the same phono-and-ground principle, with the interface added into the chain.
For DVS specifically, taking a moment to confirm the input gain and signal quality in your software prevents the tracking glitches that a marginal connection can cause.
Final checks before you play
With everything connected, test each turntable through its channel, confirm the sound is clean and full, and verify there is no hum. Check your levels so nothing distorts.
Wire it right once and your decks sound clean with zero hum. A few minutes of careful setup prevents problems mid-set and gives you confidence in your rig.
Once you know the routine, connecting turntables becomes quick and second nature.
Once your routine is set, label your cables so that future setups, especially in unfamiliar venues, take seconds rather than turning into a stressful tangle of leads.
Frequently Asked Questions
How do I connect a turntable to a DJ mixer?
Plug the turntable's RCA cables into the mixer's phono inputs, attach the ground wire to the mixer's ground terminal, and set the channel to phono. Then test for clean, hum-free sound.
Should I use phono or line input for a turntable?
Use the phono input. Turntables output a weak phono-level signal that needs the phono preamp's boost; using line inputs makes the sound faint and thin.
Why does my turntable hum through the mixer?
Hum is usually caused by a disconnected or loose ground wire. Attach the turntable's ground wire to the mixer's ground terminal to eliminate it.
Where does the turntable ground wire go?
The ground wire connects to the small ground terminal (a screw post) on the back of the DJ mixer, which removes the hum common in ungrounded setups.
How do I connect turntables for DVS?
For DVS, route the turntables through a DVS interface or DVS-capable mixer with inputs set to phono, then configure and calibrate the timecode in your software.
Why is my turntable sound so quiet?
Quiet, thin sound usually means the turntable is plugged into a line input instead of phono. Switch to the phono input so the signal is properly amplified.
Can I connect a turntable to any mixer?
You need a mixer with phono inputs and a ground terminal, or an external phono preamp. Most DJ mixers include these, but some line-only mixers require a preamp.
The bottom line
Wire it right once and your decks sound clean with zero hum. Explore Reloop turntables for your booth, and connect them to your mixer with confidence using phono inputs and the ground wire.