Your Headphones Deserve the Right Amp
Enter your headphone specs or pick from our database. See exactly which amplifiers will drive them properly, what to avoid, and why your current setup might sound off.
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Impedance Matcher
Enter your headphone specs and click "Find Matching Amps" to see results.
Popular Headphones Database
Click any headphone to load its specs into the matcher. These are some of the most commonly asked-about models.
Symptom Decoder
What you hear can tell you a lot about whether your amp and headphones are working together. Here is how to read the signs.
Thin, Weak Sound
The most common sign of underpowering. Bass has no body. The music feels like it is coming from far away. Your amp cannot push enough current through the coil.
UnderpoweredDistortion at Normal Volume
If you hear crackling or harshness before the volume gets loud, your amp is clipping. It is running out of headroom. This can damage drivers over time.
Underpowered / ClippingBass Sounds Boomy or Muddy
With tube amps and high-output-impedance sources, low-impedance headphones can get bloated bass. The damping factor is too low. The driver keeps moving after the signal stops.
High output impedanceVolume Swings Wildly
A tiny turn of the knob and it goes from too quiet to too loud. This often happens when the impedance curve of the headphone does not match the amp's output stage.
Impedance curve mismatch div>Full, Controlled Bass
Tight low end that stops and starts cleanly. The driver is getting enough current and the amp has good control. This is what proper matching sounds like.
Well matchedClear at Any Volume
Whether quiet or loud, the sound stays clean. The amp has enough power in reserve. You hear detail without strain.
Well matchedHow Impedance Matching Works
Why Impedance Matters
Impedance is resistance to electrical current, measured in ohms. Higher impedance means the headphone needs more voltage to reach the same volume. A weak source will struggle to push enough voltage, and the result is thin, lifeless sound.
Think of it like water pressure. A high-impedance headphone is like a narrow pipe. You need a strong pump (amp) to push water through it. A low-impedance headphone is like a wide pipe. It flows easily, but too much pressure can flood it.
Sensitivity Tells the Story
Sensitivity measures how loud a headphone gets with a given amount of power. It is usually listed as dB/mW or dB/V. A headphone at 100 dB/mW will be louder than one at 90 dB/mW with the same power.
Some manufacturers use dB/V instead. The matcher converts between the two using your impedance value so you can use either spec sheet.
The 1/8th Output Impedance Rule
Your amplifier's output impedance should be less than 1/8th of your headphone's impedance. This keeps the damping factor high enough for clean bass and accurate frequency response.
Most solid-state amps have output impedance under 1 ohm, so they pass this test easily. Tube amps often sit between 10 and 100 ohms, which means they pair best with higher-impedance headphones.
Planar Magnets Are Different
Planar magnetic headphones have a flat voice coil spread across a diaphragm. Their impedance is flat across frequencies (no spike at resonance), but they need more current than dynamic drivers. An amp rated for 1 watt into 32 ohms might still struggle with planars if the current delivery is weak.
Look for amps that specify high current output, not just high wattage, when running planar magnetic headphones.
Common Mistakes
Judging an amp by power rating alone is the biggest mistake. A 2-watt amp into 32 ohms means nothing if your headphones are 600 ohms. Always check the power rating at your headphone's impedance.
Another common error is assuming a portable source cannot drive high-impedance headphones. Some high-sensitivity models at 250 or 300 ohms (like the Sennheiser HD 6XX) can reach listening volume from a phone, though an amp still improves the sound.
When to Upgrade DAC vs Amp
If you hear hiss, hum, or digital artifacts, your DAC or source is the problem. A cleaner DAC or a better source fixes that.
If the sound is clean but weak, thin, or lacks dynamics, you need more power. That is an amp problem. Many people buy a DAC when they actually need an amp, or vice versa.
Quick-Reference Pairing Card
Print this or save it for your next gear purchase. These are general guidelines based on typical headphone categories.
| Headphone Type | Typical Impedance | Amp Output Z | Power Needed | Notes |
|---|---|---|---|---|
| IEMs / Earbuds | 16-32Ω | <2Ω | Under 50 mW | Very sensitive. Watch for hiss with powerful amps. |
| Portable Over-Ear | 32-80Ω | <4Ω | 50-200 mW | Most sources drive these fine. Amp adds refinement. |
| Studio Monitors | 80-250Ω | <10Ω | 200-500 mW | Benefit from a dedicated amp. Phone may struggle. |
| Hi-Fi / Audiophile | 250-600Ω | <30Ω | 500+ mW | Need a strong amp. Tube amps pair well here. |
| Planar Magnetic | 16-150Ω | <4Ω | High current | Current matters more than voltage. Check amp specs. |
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