{"data":{"slug":"sony-wf-1000xm4","type":"earbuds","brand":"Sony","name":"WF-1000XM4","aliases":["Sony WF1000XM4","Sony WF 1000XM4"],"release_date":"2021-06-08","url":"https://arkivo.dev/earbuds/sony-wf-1000xm4","specs":{"series":"1000X","model_numbers":["WF-1000XM4","YY2948"],"gtins":null,"announce_date":"2021-06-08","status":"discontinued","predecessor":"sony-wf-1000xm3","successor":"sony-wf-1000xm5","launch_price_usd":279.99,"launch_price_eur":null,"markets":["US","JP"],"colors":["Black","Platinum Silver"],"manufacturer_url":"https://www.sony.jp/headphone/products/WF-1000XM4/","spec_sheet_url":"https://www.sony.jp/headphone/products/WF-1000XM4/spec.html","manual_url":"https://helpguide.sony.net/mdr/wf1000xm4/v1/en/print.pdf","eprel_registration_number":null,"warranty_years":null,"segment":"music","form_factor":"in_ear","bud_shape":"stemless","single_bud_use":"either","rgb_lighting":null,"drivers":[{"type":"dynamic","role":null,"size_mm":6,"count":1}],"driver_type":"dynamic","driver_size_mm":6,"drivers_per_side":1,"driver_diaphragm_material":null,"frequency_response_hz":{"min_hz":null,"max_hz":40000},"impedance_ohm":null,"sensitivity_db":null,"sensitivity_reference":null,"max_sample_rate_khz":null,"max_bit_depth_bits":null,"adaptive_eq":null,"sound_personalization":true,"onboard_eq":null,"eq_bands":null,"eq_presets":null,"volume_limit_db":null,"virtual_surround":["360 Reality Audio"],"head_tracking":null,"anc":true,"anc_type":"hybrid","anc_mic_count":4,"anc_adaptive":null,"anc_levels":null,"anc_claimed_attenuation_db":null,"transparency_mode":true,"transparency_adjustable":true,"adaptive_audio_mode":null,"conversation_detection":true,"wind_noise_reduction":true,"measured_frequency_response_notes":"The measured default response emphasizes bass and lower midrange. Output above about 2 kHz is reduced relative to the review target.","measured_bass_amount_db":null,"measured_treble_amount_db":null,"measured_target_deviation_db":null,"measured_response_consistency_db":null,"measured_thd_pct":null,"measured_leakage_db_spl":null,"measured_noise_isolation":null,"measured_attenuation_overall_db":null,"measured_attenuation_passive_db":null,"measured_microphone_notes":"Published quiet, office and wind recordings show usable call pickup in quiet. Background office noise and wind reduce voice clarity.","measured_microphone_lfe_hz":null,"measured_microphone_hfe_hz":null,"measured_microphone_noise_handling_db":null,"measured_latency":null,"measured_latency_bluetooth_ms":null,"measured_latency_2_4ghz_ms":null,"measured_latency_game_mode_ms":null,"measured_battery_life":[{"anc":null,"codec":null,"hours":7.72}],"measured_battery_life_h":7.72,"measured_battery_life_with_case_h":null,"measured_charge_time_min":null,"measured_weight_g":null,"microphone_count":4,"microphone_count_total":null,"voice_pickup_sensor":true,"microphone_noise_reduction":"dsp","voice_call_bandwidth":null,"mute_button":null,"sidetone":true,"chipset":"Sony Integrated Processor V1","connection_types":["bluetooth"],"bluetooth_version":"5.2","bluetooth_codecs":["SBC","AAC","LDAC"],"bluetooth_profiles":["A2DP","AVRCP","HFP","HSP"],"bluetooth_le_audio":null,"auracast":null,"multipoint":true,"multipoint_device_count":2,"multipoint_ldac":null,"paired_device_memory":null,"automatic_device_switching":null,"fast_pair":["google_fast_pair","microsoft_swift_pair"],"audio_sharing":null,"wireless_range_m":10,"wireless_receiver":null,"receiver_connector":null,"simultaneous_2_4ghz_bluetooth":null,"low_latency_mode":null,"latency_claimed":null,"latency_claimed_min_ms":null,"compatible_platforms":["android","ios","windows","macos"],"platform_connections":[{"platform":"android","connection":"bluetooth","microphone_works":true},{"platform":"ios","connection":"bluetooth","microphone_works":true},{"platform":"windows","connection":"bluetooth","microphone_works":true},{"platform":"macos","connection":"bluetooth","microphone_works":true}],"feature_requirements":[{"feature":"360 Reality Audio personalization","requirement":"Compatible Android/iPhone, companion app ear-shape analysis, supported content and a compatible streaming service. Subscription and regional availability may apply."},{"feature":"LDAC","requirement":"Compatible LDAC source and Priority on sound quality in companion app. iPhone Bluetooth music uses AAC instead."},{"feature":"Two-device multipoint","requirement":"Updated firmware and companion app Connect to 2 devices simultaneously enabled. It routes one audio stream at a time."}],"official_license":null,"battery_capacity_mah":null,"battery_user_replaceable":null,"battery_life_claimed":[{"mode":"anc_on","codec":"LDAC","spatial_audio":null,"with_case":false,"hours":5},{"mode":"anc_off","codec":"LDAC","spatial_audio":null,"with_case":false,"hours":6},{"mode":"transparency","codec":"LDAC","spatial_audio":null,"with_case":false,"hours":4.5},{"mode":"anc_on","codec":"AAC","spatial_audio":null,"with_case":false,"hours":8},{"mode":"anc_off","codec":"AAC","spatial_audio":null,"with_case":false,"hours":12},{"mode":"transparency","codec":"AAC","spatial_audio":null,"with_case":false,"hours":8},{"mode":"anc_on","codec":"SBC","spatial_audio":null,"with_case":false,"hours":7.5},{"mode":"anc_off","codec":"SBC","spatial_audio":null,"with_case":false,"hours":11},{"mode":"transparency","codec":"SBC","spatial_audio":null,"with_case":false,"hours":7},{"mode":"anc_on","codec":"AAC","spatial_audio":null,"with_case":true,"hours":24},{"mode":"anc_off","codec":"AAC","spatial_audio":null,"with_case":true,"hours":36},{"mode":"call","codec":null,"spatial_audio":null,"with_case":false,"hours":6}],"battery_life_max_h":12,"battery_life_anc_on_h":8,"battery_life_anc_off_h":12,"battery_life_with_case_h":36,"battery_life_with_case_anc_on_h":24,"talk_time_h":6,"charge_time_0_100_min":90,"charging_notes":null,"quick_charge_min":5,"quick_charge_playback_h":1,"case_battery_capacity_mah":null,"case_battery_user_replaceable":null,"charging_port":"usb_c","case_charge_time_min":180,"wireless_charging":true,"wireless_charging_standards":["qi"],"wireless_charging_max_w":null,"case_speaker":null,"case_screen":null,"case_audio_transmitter":null,"control_types":["touch","voice_commands"],"volume_control":"touch","gesture_controls":["Single tap","Double tap","Triple tap","Touch and hold"],"customizable_controls":true,"voice_assistant":["Google Assistant","Amazon Alexa","Siri"],"wear_detection":true,"sensors":["Infrared wearing sensor","Bone conduction voice sensor"],"heart_rate_sensor":null,"skin_temperature":null,"hearing_aid_feature":null,"medical_clearances":null,"hearing_test":null,"loud_sound_reduction":null,"health_features":null,"ear_tip_sizes":["S","M","L"],"ear_tip_materials":["foam"],"stabilizers":null,"fit_test":true,"ip_rating":["IPX4"],"case_ip_rating":null,"water_resistance_depth_m":null,"companion_app":"Sony | Sound Connect","companion_app_platforms":["android","ios"],"firmware_updatable":true,"find_my_networks":["app_last_location"],"precision_finding":null,"live_translation":null,"weight_g":7.3,"dimensions_mm":null,"case_weight_g":41,"case_dimensions_mm":null,"hi_res_audio":["hi_res_audio_wireless"],"communication_certifications":null,"fcc_ids":null,"other_certifications":["360 Reality Audio certified"],"in_the_box":["WF-1000XM4 earbuds","Charging case","Noise isolation ear tips (S, M, L pairs)","USB-A to USB-C cable","Documentation"],"cables_included":[{"type":"USB-A to USB-C cable","length_m":0.2,"count":1}]},"variants":[],"sources":[{"url":"https://www.sony.jp/headphone/products/WF-1000XM4/","kind":"manufacturer_page","accessed":"2026-10-05","fields":["manufacturer_url","series","status","model_numbers","colors","markets","companion_app","in_the_box","battery_life_claimed","quick_charge_playback_h"],"notes":{"status":"Current exact Japanese maker page explicitly marks production discontinued. Regional retail stock may remain.","colors":"Exact maker Black and Platinum Silver. US launch calls the second colour silver. No newer XM5/XM6 finish borrowed.","markets":"Japanese exact product/store history and original US launch release separately establish JP and US. A translated support page alone does not establish another sales market.","companion_app":"Current maker feature 5 names Sony Sound Connect. Original manual and launch use its former name Sony | Headphones Connect."}},{"url":"https://www.sony.jp/headphone/products/WF-1000XM4/spec.html","kind":"manufacturer_page","accessed":"2026-10-05","fields":["spec_sheet_url","driver_type","drivers","weight_g","case_weight_g","bluetooth_version","bluetooth_codecs","bluetooth_profiles","wireless_range_m"],"notes":{"drivers":"Exact maker table says closed dynamic and 6 mm. The separately opened original Crutchfield review explicitly states a single 6 mm dynamic driver in each earbud. Acoustic role is not explicitly published and remains omitted.","weight_g":"Approximate mass of one earbud, corroborated by manual page 143 as 7.3 g x2 with M tips attached.","case_weight_g":"Approximate empty charging-case mass, separately listed on manual page 143.","bluetooth_codecs":"Published music codecs only. The SoundGuys review incorrectly infers LE Audio from Bluetooth 5.2, which is not used. A2DP transmission bandwidth does not establish acoustic response or maximum accepted input bit depth.","wireless_range_m":"Manual page 143 specifies approximate 10 m line of sight, with surroundings affecting range. No measured range implied."}},{"url":"https://helpguide.sony.net/mdr/wf1000xm4/v1/en/print.pdf","kind":"manual","accessed":"2026-10-05","fields":["manual_url","ear_tip_sizes","ear_tip_materials","in_the_box","cables_included","charging_port","charge_time_0_100_min","case_charge_time_min","quick_charge_min","quick_charge_playback_h","connection_types","single_bud_use","wear_detection","control_types","gesture_controls","volume_control","customizable_controls","sensors","sidetone","companion_app_platforms","firmware_updatable","multipoint","multipoint_device_count","compatible_platforms","platform_connections","model_numbers","voice_assistant","ip_rating","battery_life_claimed"],"notes":{"manual_url":"Original exact YY2948 Help Guide, 144 pages, revision 5-027-983-11(6). Technical tables, package, controls, charging, calls and updated multipoint chapters read. Later software capabilities are qualified separately from launch.","in_the_box":"Page 8 publishes cable, case and three pairs of EP-NI1000 tips. M pair fitted, not an extra pair. Japanese maker page explicitly includes instruction manual and warranty documentation.","ear_tip_materials":"Page 9 and maintenance chapters explicitly polyurethane foam. No silicone tip material inferred from siblings.","cables_included":"Page 8 states one supplied cable, approximately 20 cm.","single_bud_use":"Pages 19-20 either unit works alone with mobile-device assistant or no assistant. Google Assistant/Alexa assignments can restrict single-bud use to the playback-control earbud, initially the right unit. No independent simultaneous source playback inferred.","wear_detection":"Pages 17-18 explicitly IR sensing and pause/resume on removing/replacing either earbud.","volume_control":"Pages 21-22 permit assigning playback volume adjustment to touch sensors. Factory touch functions and assistant assignment affect availability.","sensors":"IR wearing sensor explicit in manual. Dedicated bone-conduction speech pickup sensor separately explicit in original maker release, not a speech-detecting accelerometer.","sidetone":"Pages 86-92 call chapters explicitly hear own voice through microphones. No adjustable sidetone level claimed.","multipoint":"Pages 69-70 current manual explicitly simultaneous two-device connections with app toggle. It is a later software feature, not a launch claim. One audio stream at a time. LDAC availability during multipoint remains unproved.","platform_connections":"Exact Android, iPhone, Windows 10/8.1 and Mac setup chapters. Page 93 video-call instructions explicitly select HFP/HSP calling connections for speakers and microphone. No gaming-console support inferred.","charge_time_0_100_min":"Manual page 24 defines empty-to-full charging. Earbuds fully charge in approximately 1.5 h from a previously charged case. Approximately 3 h refers to charging both headset and case together over USB. Page 25 recommends ambient 15 to 35 C. Page 143 corroborates the technical durations. These are claims, not measured values.","quick_charge_playback_h":"Page 27 about 1 h playback after 5 min charging. Exact maker Japanese page footnote qualifies AAC, ANC on, DSEE/EQ off and other features at default.","companion_app_platforms":"Page 108 explicitly Google Play and Apple App Store. No desktop companion app inferred.","case_charge_time_min":"Manual page 24 approximately 3 h empty-to-full USB charging with earbuds installed and charging simultaneously. Page 143 separately labels charging case approximately 3 h. No faster empty-case-only or Qi duration inferred. Recommended ambient 15 to 35 C on page 25."}},{"url":"https://helpguide.sony.net/mdr/wf1000xm4/v1/en/print.pdf","kind":"manual","accessed":"2026-10-05","fields":["battery_life_claimed"],"notes":{"battery_life_claimed":"Pages 27-28 music rows with DSEE Extreme OFF. ANC off also means Ambient Sound off. DSEE AUTO shortens LDAC ANC/on,off,ambient to 3.5/4/3.5 h, AAC to 6/8/6 h and SBC to 5.5/7/5.5 h. AUTO alternatives are noted rather than merged into indistinguishable rows. Volume and firmware unstated. Japanese maker footnote explicitly supplies AAC and DSEE/EQ off for case-inclusive 24 h ANC on and 36 h off. Case totals include earbuds. Call maximum 6 h with ANC/Ambient off and codec unstated. Other call modes: 5.5 h ANC on, 5 h Ambient on. No unsupported call ANC column added."}},{"url":"https://sony.mediaroom.com/2021-06-08-Sony-Electronics-Unveils-the-WF-1000XM4-Truly-Wireless-Headphones,-Setting-a-New-Standard-for-Noise-Cancellation","kind":"press_release","accessed":"2026-10-05","fields":["announce_date","launch_price_usd","segment","chipset","anc","anc_type","anc_mic_count","microphone_count","voice_pickup_sensor","microphone_noise_reduction","transparency_mode","wind_noise_reduction","conversation_detection","fit_test","wireless_charging","wireless_charging_standards","fast_pair","voice_assistant","form_factor","bud_shape","ip_rating","markets"],"notes":{"launch_price_usd":"Original US launch MSRP, before local sales tax. Current prices and SoundGuys rounded 278 USD are not substituted. Ordering opened June 8. Actual retail date is separately corroborated by retrospective TechRadar release/availability text.","anc_mic_count":"Original release explicitly two noise-sensing microphones per earbud, one feedforward and one feedback, hence four across pair.","microphone_count":"Speak-to-Chat paragraph explicitly combines four microphones for Precise Voice Pickup. Bone-conduction sensors are excluded from physical microphone counts. Total physical microphone count is not inferred from overlap between call and ANC roles.","microphone_noise_reduction":"Precise Voice Pickup uses beamforming and advanced audio signal processing. DSEE AI is music upscaling, not proof of AI voice noise reduction.","wind_noise_reduction":"Automatic Wind Noise Reduction is selectable processing that detects wind and compensates. Not a physical mesh claim.","fit_test":"Original app measures acoustic seal with supplied Noise Isolation tips. This is not a hearing assessment.","fast_pair":"Original release explicitly Google Fast Pair Android and Microsoft Swift Pair Windows 10. Manual requires Windows 10 version 1803 or later for Swift Pair.","voice_assistant":"Google Assistant/Alexa explicitly original launch, with supported language/region and app setup requirements. Siri activation is touch-controlled in manual pages 104-105, not hands-free Hey Siri.","ip_rating":"Earbuds only. Launch footnote 12 excludes sound conduit, vents and two microphone holes per unit from protection scope and states case is not water resistant.","form_factor":"Sealing foam tips and ergonomic ear-cavity design. No stem on exact maker photo and manual drawings."}},{"url":"https://www.sony.jp/headphone/products/WF-1000XM4/feature_1.html","kind":"manufacturer_page","accessed":"2026-10-05","fields":["virtual_surround","sound_personalization","hi_res_audio","other_certifications"],"notes":{"virtual_surround":"Exact maker 360 Reality Audio certified model. Ear-shape optimization through companion app and supported service/content required. No head tracking inferred.","sound_personalization":"Exact maker personal optimization explicitly uses individual ear shape and headphone characteristics. Fit test is separate acoustic-seal assessment.","hi_res_audio":"Hi-Res Audio Wireless logo on exact maker page and LDAC conditions. DSEE upscaling to 96 kHz/24 bit and V1 24-bit internal processing do not establish maximum accepted digital input resolution."}},{"url":"https://www.sony.jp/headphone/products/WF-1000XM4/feature_5.html","kind":"manufacturer_page","accessed":"2026-10-05","fields":["transparency_adjustable","companion_app"],"notes":{"transparency_adjustable":"Exact maker ambient volume slider and Voice Focus. Japanese page calls 21 steps, while original Malaysian sheet says 20 slider levels. No strength-level count stored. Activity-based profile switching does not prove ANC continuously adapting or blending ANC/transparency.","companion_app":"Exact current maker feature page names Sony Sound Connect. This replaces the former Sony | Headphones Connect name used in the original manual."}},{"url":"https://www.sony.com.my/microsite/MDR/SONY_WF1000XM4.pdf","kind":"manufacturer_pdf","accessed":"2026-10-05","fields":["frequency_response_hz","find_my_networks"],"notes":{"frequency_response_hz":"Original maker 16-page model brochure, page 6 explicitly says drivers reproduce a full range of frequencies up to 40 kHz. This is an acoustic driver claim, separate from the Bluetooth transmission table. No acoustic lower cutoff, tolerance or test setup is supplied. Only the proved upper limit is stored. Full original PDF text read through web extraction. Direct file download returned 403.","find_my_networks":"Page 10 explicitly Google Find My Device last known smartphone location and nearby tone. No crowd-based offline Find Hub network or UWB precision-finding claim."}},{"url":"https://www.sony.jp/headphone/products/WF-1000XM4/","kind":"manufacturer_page","accessed":"2026-10-05","fields":["feature_requirements"],"notes":{"feature_requirements":"Original launch footnotes 2, 4 and 5 and current exact manual pages 69-70/84/106 independently establish each requirement. Later app name changes do not imply a later hardware model."}},{"url":"https://www.soundguys.com/sony-wf-1000xm4-review-53454/","kind":"review_site","accessed":"2026-10-05","fields":["measured_battery_life","measured_frequency_response_notes","measured_microphone_notes"],"notes":{"measured_battery_life":"Exact review reports 7 h 43 min per earbud charge. ANC state, codec, original test firmware and playback level are not explicit in that paragraph and remain omitted. No claimed case total or later battery-aging reports converted into lab data.","measured_frequency_response_notes":"Exact lab curve discussion, not plotted coordinate estimates. Fixture/target revision, firmware and codec unstated.","measured_microphone_notes":"Exact ideal/office/wind demos. Review comments on AAC quality but does not explicitly label every sample codec. No sample codec or quantitative noise-handling score inferred."}},{"url":"https://www.techradar.com/reviews/sony-wf-1000xm4-wireless-earbuds","kind":"review_site","accessed":"2026-10-05","fields":["release_date"],"notes":{"release_date":"Retrospective exact WF-1000XM4 review explicitly Available now, released June 8, 2021 and on sale now. Its subsection accidentally says WH in heading, but main product identity, text and photos are WF. Corroborated by SoundGuys exact model release metadata. Not inferred from order-opening date alone."}},{"url":"https://www.crutchfield.com/S-L8b4RWU6LPi/learn/sony-wf-1000xm4-review.html","kind":"review_site","accessed":"2026-10-05","fields":["drivers"],"notes":{"drivers":"Original first-hand review by Jeff Miller, who auditioned this exact model for a week. Cleaner, more spacious sound paragraph and exploded-component caption explicitly say each earbud includes a single 6 mm dynamic driver. This is the physical per-earbud count. Its erroneous 13 h ANC-off battery claim is not used over exact Sony manual and launch data."}},{"url":"https://www.techradar.com/news/sony-wf-1000xm4-take-the-crown-as-the-best-true-wireless-earbuds-of-2021","kind":"review_site","accessed":"2026-10-23","fields":["predecessor"],"notes":{"predecessor":"TechRadar's launch report calls the WF-1000XM4 the successor to the WF-1000XM3."}},{"url":"https://www.notebookcheck.net/The-Sony-WF-1000XM4-launches-with-some-exciting-features-and-an-inflated-price-tag.544040.0.html","kind":"review_site","accessed":"2026-10-23","fields":["predecessor"],"notes":{"predecessor":"Notebookcheck calls the WF-1000XM4 the follow-up to the WF-1000XM3."}},{"url":"https://www.sony.jp/headphone/products/WF-1000XM5/feature_2.html","kind":"manufacturer_page","accessed":"2026-10-23","fields":["successor"],"notes":{"successor":"Sony Japan's product page calls the WF-1000XM4 the previous model of the WF-1000XM5."}}],"fields_filled":85,"updated":"2026-10-23"},"meta":{"api_version":"1","docs":"https://arkivo.dev/api"}}