You put the AirPods Pro in, and the bass that filled the room on your speakers isn’t there anymore. Turning the volume up doesn’t fix it, it just makes the highs more tiring before any low end shows up. This isn’t a defective pair, and it isn’t really a volume problem.
Why the seal decides your bass
Over-ear headphones sit against the side of your head with a foam or leather pad, and that pad is forgiving. AirPods Pro are in-ear monitors: a silicone tip forms a seal directly inside your ear canal, and bass response depends on that seal being airtight. Low frequencies move a lot of air slowly, and if there’s even a small gap, that air pressure leaks out before it reaches your eardrum. Highs and mids barely notice a loose fit. Bass falls apart almost immediately.
AirPods Pro also have a small pressure-equalization vent by design, so your ears don’t feel plugged and clogged during long wear. That vent is a genuine comfort feature, not a flaw, but it’s also a deliberate leak, and it costs some sub-bass the same way a loose tip does. Even with a perfect seal, part of the low end you’d get from a closed, vent-free in-ear is gone on purpose.
What actually brings the bass back
Start with the fit, because no amount of EQ fixes a bad seal. Open Settings, go to Bluetooth, tap the info button next to AirPods Pro, and run the Ear Tip Fit Test. Try the next tip size up if it reports a loose seal on either side. A tip that seals well will also cut outside noise noticeably better, so if the room around you suddenly sounds quieter, that’s a good sign you got it right.
Once the fit is solid, Apple’s own Music app has an EQ with a Bass Booster preset, under Settings, Music, EQ. It genuinely helps, but only for audio played through the Music app itself. Spotify, YouTube, a browser, or a call all pass through untouched, because this EQ lives inside one app, not on the system audio path.
For anything that plays system-wide, you need an EQ that sits after every app and before the AirPods, which is a different piece of software than a per-app setting. That’s also where you have to be careful: bass carries a lot of energy relative to how loud it sounds, so a boost that feels modest can clip well before a boost of the same size in the mids would. Push it too far without a limiter and you get distortion instead of weight.
The correction itself is simple once you know the shape: a shelf that raises everything below roughly 150–200 Hz by 4 to 6 dB, tapering back to flat by around 300–500 Hz, with nothing else touched. Some listeners also like a small dip of a decibel or two around 3 kHz once the bass is up, because raising the low end changes how loud the treble feels next to it, not because anything is actually wrong up there.
Doing it with ZonaReq
ZonaReq installs a Core Audio driver on your Mac and processes every app’s audio before it reaches your output device, so a bass shelf applies to AirPods Pro no matter what’s playing.
- Install ZonaReq and select your AirPods Pro as the output device in the main panel. No special Bluetooth mode is needed; it works over the standard connection.
- Open the 10-band equalizer and either pick a headphone-oriented preset as a starting point or set the low bands by hand: pull 32, 64 and 125 Hz up, taper 250 Hz back toward flat, and leave everything from 500 Hz up untouched unless you want the small presence dip.
- Keep an eye on the level meter as you push the low bands up. If peaks start hitting the ceiling, back the boost off a couple of decibels or let the built-in limiter catch the transients rather than raising gain further.
- Save it as a preset tied to this output, so it only applies when you’re actually on the AirPods Pro and doesn’t color audio on your speakers.
The limit worth knowing
EQ can only add back what the driver and the seal are physically capable of producing. If the tip doesn’t seal, boosting bass mostly adds distortion and rattle, not depth, so fit always comes before any EQ change. And even with a great seal, a closed, vent-free in-ear or a proper over-ear pair will always move more air at the very bottom than AirPods Pro, because that pressure vent is permanent and by design. A bass shelf gets you close to what the hardware allows. It doesn’t rewrite what the hardware is.