The Sonos Ace uses an over-ear fit and weighs 312 g, striking a balance between presence and portability. It features a foldable design and comes with a travel bag included, making it practical for use on the go. The headphones are closed-back and equipped with stereo speakers, while the detachable, tangle-free cable measures 1.2 m in length. Water resistance is not provided. The Ace is not designed for children.
The Sonos Ace is equipped with 40 mm driver units and supports both active noise cancellation (ANC) and passive noise reduction, offering two layers of isolation from ambient sound. It also supports spatial audio, adding a dimensional quality to playback. The drivers do not use a neodymium magnet.
The Sonos Ace houses a 1060 mAh rechargeable battery that delivers up to 30 hours of playback, dropping to 24 hours when active noise cancellation is enabled. A full charge takes 2 hours via USB Type-C, and a battery level indicator keeps users informed of remaining charge. The battery is not removable, and wireless charging is not supported.
The Sonos Ace supports both wireless and wired connectivity, running on Bluetooth 5.4 with a maximum range of 20 m. For codec support, it includes aptX, aptX Adaptive, aptX Lossless, and AAC, while LDAC, LDHC, aptX HD, and aptX Low Latency are not supported. Fast pairing and NFC-based pairing are also absent.
The Sonos Ace features an 8-microphone array with noise-canceling capability, making it suitable for use as a headset. It supports ambient sound mode, allowing users to let in environmental audio when needed, and in/on-ear detection enables automatic playback pausing when the headphones are removed. Controls are placed on the device itself, though there is no in-line control panel on the cable. Multipoint connectivity allows simultaneous pairing with two devices, while a dedicated mute function is not included.
The Sonos Ace supports Dolby Atmos, while notification readout is not a supported feature.