Frequently asked questions

Burn-in (also called break-in) is playing audio through new headphones, earphones, or speakers for many hours before critical listening. The idea is that the moving parts — the diaphragm and its flexible surround — settle with use, so the sound stabilizes.

This tool runs a single looping program: pink noise → brown noise → white noise → a 20 Hz to 20 kHz frequency sweep, exercising the whole driver evenly.

Music has uneven frequency content, so it works some parts of a driver far harder than others. Pink, brown, and white noise plus a full-range sweep cover the entire range evenly, from deep bass to the top of the treble — which is exactly what a burn-in routine is trying to do.

No. Start the program, put the headphones somewhere safe, and leave it running. You don't need to wear them or watch the session. Tap the spacebar to start or stop.

The honest answer is that the evidence is mixed. When people carefully measure headphones before and after long burn-in, the differences are usually very small — often within the normal variation between two units of the same model.

A lot of the "it sounds better now" impression comes from your brain adapting to a new sound signature over the first few days, a well-documented psychoacoustic effect. Loudspeaker surrounds do loosen measurably, so break-in is more plausible for speakers than for headphones. It's free and low-risk to try — see our evidence rundown for the full picture.

You can, but expect even less of a change. Many IEMs use balanced-armature drivers, which have very little moving suspension to loosen, so any burn-in effect is smaller than with a dynamic driver. Use a low volume because the driver sits right in your ear canal. See our IEM burn-in guide.

Commonly cited figures range from 40 to 100 hours or more, but there's no proven optimal number. A practical, low-effort approach is 24 to 48 hours split across a few sessions. You can also run the tool continuously and stop whenever you like.

Keep it moderate — roughly your normal listening level or slightly higher, never the maximum. Blasting new drivers risks damage and doesn't speed anything up. A good rule: if it would be uncomfortably loud to wear, it's too loud.

Not at a moderate volume. The only realistic risk is running drivers very loud for long stretches. Keep the level reasonable and your gear will be fine. For setup details by gear type, see how to burn in gear.

Yes. The channel selector lets you send the program to the left side, the right side, or both. That's handy if you want to match break-in time on a pair, or test a single driver in isolation.