Can a bad cartridge cause hum?

Yes, a faulty cartridge or loose connections at the headshell can introduce hum. Check that the cartridge is properly mounted and the pins are clean and secure. Over time, oxidation on the pins can create poor contact, leading to hum. Cleaning with a contact cleaner or gently rubbing with a pencil eraser can help. Also ensure the cartridge is aligned correctly; misalignment can cause uneven channel output and hum.

Will a power conditioner help with hum?

A power conditioner can reduce electrical noise from the mains, but it won't fix a ground loop. For hum caused by dirty power, it may help. For ground loops, use a ground isolator or proper grounding. Power conditioners vary in quality; a basic surge protector with filtering may be sufficient for minor noise, but for serious hum, a dedicated phono stage with built-in grounding is more effective.

Is it safe to lift the ground pin on the power cord?

No, never remove or lift the ground pin on a power cord. This is a safety hazard. Use a ground loop isolator or proper grounding wire instead. Lifting the ground disables the safety ground, which can lead to electric shock or damage to your equipment. Always use the intended grounding methods.

Can a turntable's built-in preamp cause hum?

Yes, a low-quality or faulty built-in preamp can introduce hum. If your turntable has a built-in preamp, try switching it off and using an external phono stage. External preamps often have better shielding and grounding options, which can eliminate hum. Also check that the preamp is not placed too close to power supplies or other electronics.

Does the type of stylus affect hum?

The stylus itself does not cause hum, but a worn or dirty stylus can exacerbate noise issues. A dirty stylus may not track properly, leading to increased surface noise that can be mistaken for hum. Regular cleaning with a stylus brush or gel can prevent this. However, hum is an electrical issue, not mechanical, so the stylus is rarely the root cause.

Silence That Hum: Record Player Noise Solutions

Published July 29, 2026 · Reviewed by the Unbiased Advice & Insights editorial team · How we research and score

Quick answer

Most record player hum comes from a ground loop. Connect the turntable's grounding wire to the amplifier's ground terminal or use a ground loop isolator. Also check cables and move the turntable away from other electronics.

If you've ever set up a turntable only to hear a low-frequency hum through your speakers, you know how frustrating it can be. That hum is usually not a sign of a broken record player. It's often caused by electrical issues like ground loops, poor shielding, or interference from nearby electronics. The good news is that most hum problems can be fixed with simple adjustments or inexpensive accessories. In this guide, we'll walk through each cause in detail and provide step-by-step fixes to get your system humming along quietly.

Why It Happens

Hum in a turntable system typically comes from one of three sources. Understanding the source helps you choose the right fix.

Ground Loops

A ground loop occurs when there are multiple paths to ground in your audio system. This creates a small voltage difference that gets amplified as a 60 Hz hum (or 50 Hz in some regions). Turntables are especially prone because they often have a separate grounding wire that must be connected to the amplifier or receiver. For example, if your turntable and amplifier are plugged into different outlets, the ground potential can differ slightly, causing a loop. Even a few millivolts of difference can produce an audible hum through sensitive speakers.

Poor Shielding

Turntables with low-quality or damaged cables can pick up electromagnetic interference from nearby electronics, power cables, or even Wi-Fi routers. Unshielded or poorly shielded phono cables act like antennas. For instance, running a phono cable parallel to a power cord for several feet can induce a 60 Hz hum. Similarly, placing your turntable near a Wi-Fi router can introduce high-frequency noise that manifests as a buzz or hum. Shielding quality varies widely between turntable models; budget turntables often use thin, unshielded cables that are more susceptible.

Electrical Interference

Placing your turntable on the same power strip as a computer, TV, or LED lights can introduce noise into the signal. Also, dimmer switches and motors (like those in refrigerators) can cause hum when they cycle on and off. For example, a refrigerator compressor kicking on can create a momentary voltage drop that your amplifier interprets as a pop or hum. Even LED bulbs with cheap drivers can radiate interference into nearby audio cables. Keeping your turntable and amplifier on a dedicated circuit or using a power conditioner can mitigate this.

How to Fix It

Try these fixes in order. Most are free or low-cost. Start with the simplest and work your way up.

Check the grounding wire. If your turntable has a separate ground wire (usually a single wire with a spade connector), make sure it's attached to the ground terminal on your amplifier or receiver. If the terminal is missing, connect it to a screw on the chassis (any unpainted metal part). For example, many vintage receivers have a dedicated ground post; if yours doesn't, use a screw on the back panel. Ensure the connection is tight and clean; corrosion can weaken the connection.
Use a ground loop isolator. If grounding doesn't help, insert a ground loop isolator between the turntable and the amplifier. These inexpensive devices break the ground loop without affecting sound quality. Look for one designed for phono signals, as some isolators are meant for line-level signals and may degrade the delicate phono signal. A typical isolator uses a transformer to decouple the ground path while passing the audio signal.
Inspect and replace cables. Damaged or low-quality RCA cables can cause hum. Try swapping them with known good cables. Keep phono cables away from power cords and cross them at right angles if they must meet. For example, if your RCA cables are old and have frayed shielding, replace them with shielded, low-capacitance cables designed for turntables. Also check that the connectors are snug; loose jacks can introduce hum.
Reposition the turntable. Move your turntable away from other electronics, especially Wi-Fi routers, computers, and power strips. A distance of 2-3 feet can make a big difference. Also avoid placing it on top of the amplifier, as the amplifier's transformer can radiate magnetic fields. If possible, place the turntable on a separate shelf or stand. Experiment with orientation: sometimes rotating the turntable 90 degrees reduces hum from directional interference.
Check the cartridge and headshell. Loose connections at the cartridge pins or headshell wires can introduce hum. Ensure everything is snug and clean. If the cartridge is old, consider replacing it. Use a magnifying glass to inspect the pins for dirt or corrosion. Cleaning with isopropyl alcohol and a cotton swab can restore contact. Also verify that the headshell is securely attached to the tonearm; a loose headshell can cause intermittent hum.
Try a different power outlet. Plug the turntable and amplifier into the same outlet or power strip to minimize ground loop potential. Avoid using outlets on different circuits. For example, if your turntable is plugged into a wall outlet and your amplifier into a power strip on the other side of the room, they may be on different circuits, creating a ground loop. Using a single power strip for both devices ensures they share the same ground reference.
Add a dedicated power filter. For persistent interference from household electronics, a power conditioner or surge protector with noise filtering may help. This is a more expensive option but can clean up the overall power supply. Look for a unit with EMI/RFI filtering and isolated outlets for audio gear. Some power conditioners also provide voltage regulation, which can help if your home has fluctuating power.

When to Replace

If you've tried all the above and the hum persists, the issue may be internal. Faulty capacitors, a failing motor, or damaged internal wiring can cause hum. In such cases, repair by a professional may cost more than the turntable is worth. If your turntable is a budget model, replacing it with a better-shielded model might be the most cost-effective solution. Look for turntables with a metal chassis, good internal shielding, and a separate grounding wire. Models like the Audio-Technica AT-LP60X or Fluance RT81 are known for their quiet operation. Check the current price on Amazon for popular models. Also consider a turntable with a built-in ground lift switch, which can help in some setups.

Additional Tips for Persistent Hum

If the standard fixes don't work, here are a few advanced techniques. First, try using a cheater plug (three-prong to two-prong adapter) on the amplifier only, but only if the amplifier has a two-prong power cord. This can break a ground loop, but it removes the safety ground, so use caution and only as a test. Never use a cheater plug on a turntable with a three-prong cord. Second, consider adding a dedicated phono preamp with better grounding options. Many external preamps have a ground terminal and better isolation than built-in ones. Third, check for ground loops in other connected components like a subwoofer or powered speakers; disconnect them one by one to isolate the source. Finally, if you live in an older building with outdated wiring, a ground loop isolator at the power entry point (like an isolation transformer) may be necessary, but that's a job for an electrician.

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