Sonos has introduced the Ace Ultra, an upgraded version of its original Ace headphones, priced at $449. The new model includes improvements such as enhanced sound quality, active noise cancellation (ANC), and a feature allowing the headphones to function as a full-fledged member of a Sonos system. This update is part of Sonos' broader platform overhaul, known as the Sonos 27 platform, which includes the Headphone Engine 2. This upgrade enables "headphone linking," allowing users to send audio from Sonos speakers to the headphones and vice versa, similar to how speakers are linked within the system. The feature also includes TV Audio Swap, which was available on the original Ace model. The Ace Ultra has a slightly larger and heavier design compared to the original Ace, with new color options such as Agave. Internal upgrades include 10 microphones for improved ANC, which adjusts in real time based on the environment. Additionally, the headphones offer an Adaptive EQ that automatically adjusts sound based on the user's fit, with customization options for both 3-band and 8-band EQ settings. Battery life has been extended to up to 35 hours, with a user-replaceable battery and an app that estimates battery life based on usage. Audio performance improvements include 40mm drivers tuned by Grammy and Oscar-winning sound engineers, resulting in deeper bass, finer detail, and zero distortion. The ANC performance is said to be up to twice as effective as the original model, though it may not block human voices or TV dialogue as effectively. The headphones also feature an Aware mode for ambient sound, which is described as the most natural-sounding on over-ear headphones, and a Sidetone feature for hearing oneself during calls. The TV Audio Swap feature allows users to switch audio from a TV to the headphones with a long press on the multi-function Content Key. However, there have been reports of occasional audio cuts or skips during testing, which may be resolved in future updates. The new headphone linking feature allows for seamless audio transfer between devices without the same issues reported with TV Audio Swap. Sonos' main competitor in this space is Bose, which offers similar features with its SimpleSync and Cinema Mode for private listening and spatial audio. The Ace Ultra is seen as a more complete product compared to the original Ace, which lacked full integration with Sonos systems. The improvements in audio quality, ANC, battery life, and system integration make the Ace Ultra a significant upgrade and a recovery for Sonos following its 2024 challenges.