Sony updated the XM4C's sound profile and expanded the equalizer from 5 bands to 10, adding a dedicated gaming EQ preset, according to The Verge and Engadget. The headphones also move from Bluetooth 5 to Bluetooth 6. Sony has announced the upgrade but hasn't published performance testing showing what buyers will actually notice, per The Verge.

A new Quick Access feature lets users launch streaming apps with one touch, distinct from the Quick Attention chat feature the original XM4 already had, Engadget reported. Sony also revised the quick-charge system so three minutes on the cable now buys an hour of playback. Those are the confirmed changes: a bigger EQ, a newer Bluetooth standard, one new software shortcut, and faster top-ups. All software and connectivity, not the machinery that actually cancels noise.

The XM4C uses the same design as the original XM4, including the folding hinge system, with the Lavender finish as the one visible change, The Verge reported. Sony has not announced a change to the QN1 chip or four-microphone ANC arrangement; both carry over unchanged from 2020, per the same report. That puts the XM4C behind the eight-microphone XM5 and well behind the twelve-microphone, QN3-equipped XM6 on paper.

Battery life actually drops: Sony lists 27 hours with ANC on, down from 30 hours on the original XM4, a figure confirmed by both The Verge and Engadget. A pre-announcement leak published last month claimed the XM4C would also carry over the original's 40mm drivers, LDAC, DSEE Extreme, and Speak-to-Chat features, and estimated 34 hours of battery with ANC off, according to SoundGuys. Sony's official announcement hasn't confirmed those specific figures, so they remain likely rather than settled.

Taken together, the confirmed carryovers and the battery step backward suggest the "second-generation" label describes the software layer sitting on top of 2020 engineering, not a redesign underneath it.

Sony's three current headphone models sit at different points on paper. The XM6 pairs a QN3 processor with 12 microphones and lists at $449, adding Auracast compatibility, scene-based listening, and a cinema audio mode that neither older model has, according to a TechRadar comparison published in May 2025. The XM5 runs 8 microphones on the older QN1 chip and lacks a folding hinge. The XM4C sticks with 4 microphones on that same QN1 chip but keeps the fold-flat design the XM5 dropped, according to The Verge and Sony's announcement.

Microphone count is a spec, not a scoreboard. More mics generally give a chip more input to work with when canceling noise or isolating a caller's voice, but without independent testing of the XM4C, there's no data yet showing how the four-mic QN1 setup actually performs against its eight- and twelve-mic siblings. The folding hinge is a similar case: it's a portability feature Sony chose to preserve on the cheaper model while abandoning it on the pricier XM5, not evidence of better or worse audio performance.

Price comparisons carry the same caveat. Sony's $299.99 figure for the XM4C is a list price, what the company suggests retailers charge at launch, not a guarantee of what shoppers will actually pay once the headphones hit shelves this fall. The TechRadar comparison found the XM5, a generation newer than the XM4C with double the microphones, regularly selling for around $300 as of last spring, well below its own $449 launch price. Whether that same discount pattern shows up again once the XM4C is competing for shelf space depends on retailer pricing that isn't public yet.

The Verge also noted the XM4C now costs more than clearance-priced original XM4 units did before Sony discontinued them in 2025, a reminder that a lower launch price than a six-year-old flagship isn't the same as a low price outright. Sony released two other updated models alongside the XM4C: the $180 WH-CH730N and $70 WH-CH530, both arriving in September, according to Sony's announcement. Those models matter here for one reason: they got the same 10-band and gaming EQ upgrades as the XM4C, which shows those software features aren't exclusive to the revived flagship, The Verge reported. Sony's newest ANC silicon, by contrast, stayed on the XM6 alone.

The WH-1000XM4C arrives this fall in Black and Platinum Silver through Sony, Amazon, Best Buy, and other authorized retailers, with the Lavender colorway sold only through Sony and Amazon, per Sony's announcement. The WH-CH730N and WH-CH530 are already available in September through the same retail channels, Sony says.

Nothing cited here includes independent lab testing of the XM4C's real-world noise cancellation or call quality. Everything so far traces back to Sony's own announcement and the pre-launch leak SoundGuys reported last month. That leaves two open variables: how the four-mic QN1 setup actually performs once reviewers get units in hand, and where XM5 pricing settles once the XM4C is competing for the same shelf space this fall.

For now, Sony has confirmed a cheaper, foldable successor built on a familiar ANC platform with a handful of software upgrades. Whether that adds up to a meaningful value or simply an old flagship wearing a new MSRP will depend on what independent reviewers find and what retailers actually charge once the XM4C ships.