Apple took another step toward a more personalized audio future by seeding a second developer beta of AirPods firmware version 9 on June 23, 2026. The update, released alongside watchOS 27 beta 2, expands testing of iOS 27‑era audio features to a wider set of AirPods models, most notably bringing custom equalizer (EQ) capabilities to headsets that previously lacked them. For the millions of Windows users who pair AirPods with their PCs, the move raises an intriguing question: Will this firmware boost the listening experience on non‑Apple hardware?
What the Firmware 9 Beta 2 Delivers
The centerpiece of the new beta is an expansion of custom EQ—a feature that lets users fine‑tune audio output to match their hearing preferences or simply tweak the sound signature. While Apple has offered similar accommodation in the past through iOS’s Headphone Accommodations settings, the system‑level custom EQ exposed by the firmware has, until now, been exclusive to higher‑end AirPods Pro and AirPods Max. The beta hints that the feature is trickling down: more AirPods variants, possibly including the entry‑level AirPods (4th generation) and older Pro models, gain native support for persistent, device‑stored EQ profiles.
Developers enrolled in Apple’s program can install the beta through the Apple Developer Center, but only while the AirPods are tethered to a device running the corresponding watchOS 27 or iOS 27 beta. The firmware is identified by build number 9B2056, according to the developer release notes. Because these are pre‑release builds, rough edges are expected—some testers report occasional Bluetooth disconnects when switching between Apple devices and a PC.
How AirPods Firmware Updates Work—and Why They Matter
Unlike most consumer electronics, AirPods receive firmware updates silently and automatically. When the earbuds or headphones are connected to an iPhone, iPad, or Mac over Bluetooth, and are placed in their charging case and connected to power, the update downloads and installs in the background. There’s no manual trigger, and users typically notice a change only when they stumble upon a new feature listed in the Bluetooth settings.
This seamless delivery mechanism has allowed Apple to roll out meaningful feature updates without any action from the user. Past firmware revisions added spatial audio, conversation boost, and support for Find My network. Custom EQ, however, is different—it directly changes how music, podcasts, and calls sound on a per‑user basis, making it one of the most tangible upgrades yet.
Custom EQ: From Niche to Mainstream
At its core, custom EQ lets users bypass a device’s default audio tuning. In Apple’s implementation, it likely builds on the audiogram‑based personalization introduced in iOS 15. Users could upload an audiogram from a hearing test, and the system would adjust frequencies to compensate for hearing deficiencies. Firmware 9 appears to take this further by embedding the EQ processing onto the AirPods themselves, rather than relying on the host device’s processing. That means the personalized profile stays with the AirPods regardless of which gadget they’re connected to—a boon for anyone who switches between an iPhone, an iPad, a Mac, and, critically, a Windows PC.
Currently, supported models like AirPods Pro 2 store a “Personalized Audio” profile that works across Apple devices signed into the same iCloud account. The new firmware likely extends this storage to more models, and perhaps even relaxes the iCloud requirement, though that remains unconfirmed. If the profile can be written once via an Apple device and then used universally, Windows machines could finally benefit from audiophile‑grade tuning without installing extra software.
The Cross‑Platform Promise for Windows Enthusiasts
AirPods are enormously popular beyond Apple’s ecosystem. According to a 2025 survey by SlashGear, over 40% of AirPods users regularly pair them with a Windows laptop or desktop for work calls, gaming, and media consumption. Yet the Windows Bluetooth stack has historically treated AirPods as generic stereo headphones, offering none of the advanced features like spatial audio, automatic switching, or custom EQ.
Third‑party utilities such as MagicPods and AirPods Desktop have filled some gaps, providing battery‑level indicators and basic touch‑control remapping. However, deep audio processing—especially EQ—has remained elusive because it requires access to the AirPods’ onboard DSP (digital signal processor). If firmware 9 bakes the EQ logic directly into the AirPods’ firmware and stores the profile locally, Windows could theoretically benefit as soon as the AirPods reconnect to a PC. No additional drivers would be needed; the audio would already be shaped to the user’s preference.
Of course, there are caveats. The initial setup will still require an Apple device running the latest beta. Windows users without an iPhone or iPad would need to borrow one, at least temporarily, to create and save the custom EQ. Moreover, the beta firmware is not yet publicly available—it’s restricted to developers—so widespread use is months away. And history shows that Apple occasionally gates certain features behind proprietary protocols, meaning the company could choose to limit the EQ block to Apple‑certified connections even if the hardware supports it.
What Windows Users Can Do Right Now
While waiting for the final firmware, Windows fanatics aren’t completely helpless. The built‑in Windows audio enhancements (found under Sound Control Panel > Playback > Properties > Enhancements) offer a bass boost, virtual surround, and loudness equalization. For more granular control, third‑party system‑wide equalizers like Equalizer APO and Peace GUI can mimic some of the custom EQ’s benefits, though they lack the convenience of a profile that travels with the earbuds.
If you have access to a developer account, installing the AirPods beta on a secondary set of earbuds and testing them with a Windows 11 PC would provide early feedback to the community. Those brave enough to try should note that firmware downgrades on AirPods are notoriously difficult—once updated, there’s typically no going back—so proceed with caution.
The Bigger Picture: Firmware Silos Are Breaking Down
The trend toward device‑stored personalization isn’t unique to Apple. Sony’s WH‑1000XM6 headphones save EQ profiles on the headset, as do several high‑end Sennheiser models. The difference is that Sony and Sennheiser provide a dedicated Windows app for configuration, while Apple has so far refused to build one. A cross‑platform AirPods configuration tool has been rumored for years, and while firmware 9 doesn’t deliver such an app, it does move the necessary intelligence into the hardware—potentially paving the way for future PC‑side software, whether from Apple or a third party.
Industry analysts see this as another step in Apple’s slow opening of its peripheral ecosystem. In 2024, the company began allowing limited AirPods feature configuration on Android via the Beats app. A similar olive branch to Windows would make commercial sense, especially as Microsoft continues to push Windows‑on‑Arm laptops and cross‑device experiences with Phone Link. In fact, Phone Link already passes notification and call audio to PCs; integrating an EQ panel would be a natural extension.
Public Release Timeline and Expectations
Based on Apple’s typical cadence, AirPods firmware 9 will likely ship to all users in September 2026, coinciding with the public release of iOS 27 and watchOS 27. The beta period usually spans three to four months, with several iterations that squash bugs and refine performance. The second beta suggests the feature set is largely locked, with remaining work focused on stability.
For Windows users, the immediate impact will be subtle. Without a companion app, they’ll need to rely on the fact that their AirPods now carry a custom EQ profile that was configured on an Apple device. If that profile genuinely persists across all connections, the moment they pop the AirPods into their ears and connect to a Windows PC, they should hear the tailored sound—no extra clicks required. This quiet, invisible upgrade would, in many ways, be the most Apple‑like solution: it just works, even if you’ve switched ecosystems.
A Word of Caution for Beta Testers
Anyone attempting the developer beta should be aware of potential pitfalls. Bluetooth connectivity issues have been reported in the watchOS 27/iOS 27 beta threads, particularly when the AirPods are connected to a PC and an Apple device simultaneously. Some users note that the custom EQ occasionally resets after a hard reset of the AirPods, requiring re‑configuration via an Apple device. Additionally, battery life may be slightly impacted because the on‑board DSP is now processing EQ instructions constantly.
For those whose primary computer runs Windows, the safest bet is to wait for the consumer release. But for the curious and the tweaker crowd, this beta offers a tantalizing preview of a future where your earbuds sound the way you want, on every device you own. As the line between platforms blurs, a good pair of earbuds should serve the listener, not the ecosystem. Firmware 9 brings that ideal one step closer.