Every reviewer we consulted agreed: the XM6 is the best-sounding Sony WH headphone to date. The key improvement is tonal balance—where the XM5 pushes a V-shaped signature with emphasized bass and sometimes-fatiguing treble around 3 kHz, the XM6 smooths the response into something warmer, more detailed, and less tiring over long sessions. Sub-bass hits deeper with more texture, mids are clearer and less recessed, and the soundstage is noticeably wider. Multiple reviewers noted instruments are easier to pick apart spatially on the XM6. Sony’s new 10-band parametric EQ gives granular control the XM5’s 5-band system can’t match. That said, the XM5 still sounds very good—especially with EQ tweaks—and most casual listeners won’t feel shortchanged.

The XM6’s QN3 processor is 7× faster than the XM5’s QN1, and it shows. With 12 microphones (vs. 8), the XM6 adapts more precisely to changing environments—multiple reviewers confirmed it handles mid-frequency noise (office chatter, keyboard clacking) significantly better than the XM5. Both are class-leading for low-frequency cancellation (airplane engines, HVAC). The practical difference in quiet rooms is minimal, but in noisy commutes and open offices, the XM6 pulls ahead. One important caveat from measurement-based reviews: the XM6’s softer ear pads can break seal more easily, especially for glasses wearers, which may reduce ANC effectiveness in practice.

The XM6 brings back the foldable hinge design Sony controversially removed on the XM5, and pairs it with a more compact magnetic-clasp carrying case. The headband is wider and flatter, distributing pressure more evenly—eliminating the hot-spot complaint common with the XM5’s thinner headband. However, a critical concern has emerged: multiple reports of hinge failures on the XM6 have surfaced within the first six months, echoing the well-documented durability issues reported for the XM5. Sony has reportedly denied warranty coverage for some of these failures, calling them “physical damage.” Neither model has an IP rating for water or sweat resistance. Both weigh roughly 250g, making them among the lightest premium ANC headphones available.

This is one of the XM6’s biggest upgrades. With 6 AI beamforming microphones (vs. 4 on the XM5), the XM6 was described by multiple reviewers as having the best call quality of any over-ear headset they’ve tested. It isolates your voice more aggressively from background noise—traffic, other voices, HVAC—so the person on the other end hears you clearly. The XM5’s call quality is still decent, but it lets more ambient sound bleed through in chaotic environments, and voices can sound slightly thin or echoey. Wind noise remains a challenge for both models, though the XM6 handles it somewhat better.

The XM6 pulls ahead with Bluetooth 5.3 and LE Audio (LC3 codec) support, future-proofing it for Auracast and improved efficiency as the ecosystem matures. Both support multipoint for two devices, but reviewer complaints noted the XM6’s multipoint can cause audio interruptions when switching—a firmware issue Sony may address. The XM6 also adds a wear sensor for auto-pause, the ability to listen while charging (a first for the series), and expanded spatial audio with 360 Upmix for Cinema. The biggest missing feature on both: no USB-C audio playback. At ~$450, this omission on the XM6 is particularly hard to justify when competitors like Bowers and Wilkins Px8 and Apple AirPods Max offer it.