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For hi-res audio, there's support for Sony's LDAC codec, which means you can listen to files up to 32-bit/96kHz over Bluetooth at up to 990kbps. Instead of DSEE HX, the XM4 get a new DSEE Extreme engine for upscaling low-quality audio files.
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The WF-1000XM4 boast a completely new Integrated Processor V1, a Sony chip that, along with new 6mm drivers, makes for better noise-cancelling and improved sound quality. Ambient Sound allows in more outside noise to make you aware of your surroundings, while Quick Attention lets you hold a quick conversation without having to take the earbuds out. Noise-cancelling comes as standard, while there are some other modes to get your teeth into. The XM3s also use Sony's DSEE HX sound processor, which can upscale low-bitrate music files to near hi-res quality. Like the WF-1000XM4, they support SBC and AAC codecs, but not aptX HD. They're powered by Sony's QN1e HD noise-cancelling processor, which also takes care of the DAC and analogue amplification duties. **Winner** Draw Sony WF-1000XM4 vs WF-1000XM3: featuresīeing some of the best true wireless earbuds around, the WF-1000XM3 are not short of features. We don't have any major issues with both pairs when it comes to comfort, and we'd happily use either for long listening sessions. The former rest more snugly in your ear opening, while there's more earbud outside your ear with the latter. The older WF-1000XM3 come with no fewer than seven different sizes of tip to try out four ‘hybrid silicone’ buds and three ‘triple-comfort’ buds.īoth the WF-1000XM4 and the WF-1000XM3 sit differently in your ear. Disappointingly, you only get three different sizes of tip to choose from in the box. Sony claims this helps the headphones provide better noise isolation and you can use the Sony Headphones Connect app to test just how good your seal is. They're made from polyurethane and feel like a silicone-foam hybrid. The distinctive 'squashed pill' look of the XM3 has been replaced by a more conventional, rounded design that's 10 per cent smaller.Īnother notable change for the WF-1000XM4 is the redesigned ear tips. The first thing that strikes you about the WF-1000XM4 is the shape.