{"data":{"slug":"soundcore-liberty-4-nc","type":"earbuds","brand":"soundcore","name":"Liberty 4 NC","aliases":["Anker Soundcore Liberty 4 NC","A3947"],"release_date":"2023-06-29","url":"https://arkivo.dev/earbuds/soundcore-liberty-4-nc","specs":{"series":null,"model_numbers":["A3947","A3947Z11"],"gtins":null,"announce_date":null,"status":"available","predecessor":null,"successor":null,"launch_price_usd":99.99,"launch_price_eur":null,"markets":["US"],"colors":["Velvet Black","Clear White","Navy Blue","Pastel Pink","Light Blue"],"manufacturer_url":"https://www.soundcore.com/products/liberty-4-nc-a3947z11","spec_sheet_url":"https://www.soundcore.com/products/liberty-4-nc-a3947z11","manual_url":"https://salesforce-knowledge-download.s3.us-west-2.amazonaws.com/000012513/en_US/000012513.pdf","eprel_registration_number":null,"warranty_years":1.5,"segment":"music","form_factor":"in_ear","bud_shape":"stem","single_bud_use":"either","rgb_lighting":null,"drivers":[{"type":"dynamic","role":null,"size_mm":11,"count":null}],"driver_type":"dynamic","driver_size_mm":11,"drivers_per_side":null,"driver_diaphragm_material":"Liquid Crystal Polymer (LCP)","frequency_response_hz":{"min_hz":20,"max_hz":40000},"impedance_ohm":10,"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":8,"eq_presets":null,"volume_limit_db":null,"virtual_surround":["3D surround sound"],"head_tracking":null,"anc":true,"anc_type":"hybrid","anc_mic_count":null,"anc_adaptive":true,"anc_levels":5,"anc_claimed_attenuation_db":38,"transparency_mode":true,"transparency_adjustable":null,"adaptive_audio_mode":null,"conversation_detection":null,"wind_noise_reduction":true,"measured_frequency_response_notes":null,"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":null,"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":true,"codec":null,"hours":9.883333333333333}],"measured_battery_life_h":9.883333333333333,"measured_battery_life_with_case_h":null,"measured_charge_time_min":null,"measured_weight_g":null,"microphone_count":6,"microphone_count_total":6,"voice_pickup_sensor":null,"microphone_noise_reduction":"ai","voice_call_bandwidth":null,"mute_button":null,"sidetone":null,"chipset":null,"connection_types":["bluetooth"],"bluetooth_version":"5.3","bluetooth_codecs":["SBC","AAC","LDAC"],"bluetooth_profiles":null,"bluetooth_le_audio":null,"auracast":null,"multipoint":true,"multipoint_device_count":2,"multipoint_ldac":false,"paired_device_memory":null,"automatic_device_switching":null,"fast_pair":["google_fast_pair"],"audio_sharing":null,"wireless_range_m":10,"wireless_receiver":null,"receiver_connector":null,"simultaneous_2_4ghz_bluetooth":null,"low_latency_mode":true,"latency_claimed":null,"latency_claimed_min_ms":null,"compatible_platforms":["android","ios","windows","macos"],"platform_connections":[{"platform":"windows","connection":"bluetooth","microphone_works":true},{"platform":"macos","connection":"bluetooth","microphone_works":true}],"feature_requirements":[{"feature":"LDAC playback","requirement":"Compatible Android 8.0 or later source. Enable Preferred Audio Quality in the soundcore app and install the required earbud firmware update. LDAC disables multipoint."},{"feature":"Full app features","requirement":"Maker recommends soundcore app 3.2.7 or later and current earbud firmware. The companion app is not available for computers."},{"feature":"Computer calls","requirement":"On Windows, select Liberty 4 NC Hands-Free for microphone and speaker in the call app. The maker Mac computer guidance instead says to select Liberty 4 NC for input and output. Stereo playback and hands-free calls use different Bluetooth audio modes."}],"official_license":null,"battery_capacity_mah":53,"battery_user_replaceable":null,"battery_life_claimed":[{"mode":"anc_off","codec":null,"spatial_audio":null,"with_case":false,"hours":10},{"mode":"anc_off","codec":null,"spatial_audio":null,"with_case":true,"hours":50},{"mode":"anc_on","codec":null,"spatial_audio":null,"with_case":false,"hours":8},{"mode":"anc_on","codec":null,"spatial_audio":null,"with_case":true,"hours":40},{"mode":"transparency","codec":null,"spatial_audio":null,"with_case":false,"hours":8},{"mode":"transparency","codec":null,"spatial_audio":null,"with_case":true,"hours":40},{"mode":"anc_off","codec":"LDAC","spatial_audio":null,"with_case":false,"hours":6},{"mode":"anc_off","codec":"LDAC","spatial_audio":null,"with_case":true,"hours":30},{"mode":"anc_on","codec":"LDAC","spatial_audio":null,"with_case":false,"hours":5},{"mode":"anc_on","codec":"LDAC","spatial_audio":null,"with_case":true,"hours":25},{"mode":"call","codec":null,"spatial_audio":null,"with_case":false,"hours":4.5}],"battery_life_max_h":10,"battery_life_anc_on_h":8,"battery_life_anc_off_h":10,"battery_life_with_case_h":50,"battery_life_with_case_anc_on_h":40,"talk_time_h":4.5,"charge_time_0_100_min":90,"charging_notes":"The maker estimates about 1.5 hours for a full earbud charge in the case, about 3 hours for the case by cable, or 3.5 hours for the case wirelessly. Ten minutes of charging is claimed to provide four hours of earbud playback. The manual lists a 5 V / 0.8 A input. Use a certified USB-C charging cable and fully dry the buds and charging port first. ANC, LDAC, calls and volume affect runtime. LDAC and multipoint cannot be used together.","quick_charge_min":10,"quick_charge_playback_h":4,"case_battery_capacity_mah":800,"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"],"volume_control":"touch","gesture_controls":["Single tap: play/pause","Double tap right: next track","Double tap left: previous track","Double tap: answer call","Hold 2 seconds: end/reject call or switch ANC/transparency"],"customizable_controls":true,"voice_assistant":null,"wear_detection":true,"sensors":null,"heart_rate_sensor":null,"skin_temperature":null,"hearing_aid_feature":null,"medical_clearances":null,"hearing_test":true,"loud_sound_reduction":null,"health_features":null,"ear_tip_sizes":["XS","S","M","L"],"ear_tip_materials":["silicone"],"stabilizers":["none"],"fit_test":true,"ip_rating":["IPX4"],"case_ip_rating":null,"water_resistance_depth_m":null,"companion_app":"soundcore","companion_app_platforms":["android","ios"],"firmware_updatable":true,"find_my_networks":null,"precision_finding":null,"live_translation":null,"weight_g":5.2,"dimensions_mm":null,"case_weight_g":null,"case_dimensions_mm":null,"hi_res_audio":["hi_res_audio_wireless"],"communication_certifications":null,"fcc_ids":null,"other_certifications":null,"in_the_box":["Left and right earbuds","Charging case","Four pairs of silicone ear tips","USB-A to USB-C charging cable","Quick Start Guide","Important Safety Instructions"],"cables_included":[{"type":"USB-A to USB-C","length_m":null,"count":1}]},"variants":[{"model_number":"A3947Z11","model_numbers":["A3947"],"markets":["US"],"colors":["Velvet Black"],"wireless_charging":true,"wireless_charging_standards":["qi"],"in_the_box":["Left and right earbuds","Charging case","Four pairs of silicone ear tips","USB-A to USB-C charging cable","Quick Start Guide","Important Safety Instructions"]}],"sources":[{"url":"https://www.soundcore.com/products/liberty-4-nc-a3947z11","kind":"manufacturer_page","accessed":"2026-10-08","fields":["manufacturer_url","spec_sheet_url","status","markets","colors","segment","form_factor","bud_shape","anc","anc_adaptive","transparency_mode","microphone_count","microphone_count_total","microphone_noise_reduction","connection_types","bluetooth_version","multipoint","multipoint_device_count","multipoint_ldac","fast_pair","low_latency_mode","charge_time_0_100_min","case_charge_time_min","quick_charge_min","quick_charge_playback_h","control_types","volume_control","customizable_controls","fit_test","ip_rating","companion_app","companion_app_platforms","firmware_updatable","weight_g","hi_res_audio","compatible_platforms","platform_connections","feature_requirements","sound_personalization","variants","model_numbers"],"notes":{"status":"Current US maker A3947Z11 listing shows Velvet Black and Add to Cart. Current price is not used as launch evidence.","colors":"Five directly listed colour choices. Only the US Velvet Black reference row is represented.","multipoint_device_count":"Maker explicitly describes concurrent connections to two source devices. This is separate from saved pairing history.","multipoint_ldac":"Exact FAQ How do I enable LDAC mode states that enabling LDAC automatically exits multipoint. The original manual also explicitly disables two-device connection for LDAC.","microphone_count":"Maker says six microphones with an AI algorithm for calls. Counts the physical microphones across the pair, without adding ANC functions as extra microphones.","microphone_count_total":"The maker explicitly lists six physical microphones. Shared ANC and call functions are counted once. No case microphone is inferred.","charge_time_0_100_min":"Charging FAQ directly reports around 1.5 hours to fully charge the earbuds, converted to 90 minutes. Approximate maker estimate, with adapter and initial percentage not separately stated.","case_charge_time_min":"Charging FAQ reports around 3 hours to fully charge the case via a wall charger, converted to 180 minutes. Separate wireless estimate is 3.5 hours. This is not a reviewer measurement.","quick_charge_playback_h":"Maker states 10 minutes for 4 hours. Public RTINGS Office paragraph explicitly describes a ten-minute charge in the case yielding four hours of playback. ANC, codec and volume for this quick-charge claim are not stated, so they remain unknown.","volume_control":"Maker FAQ says to customize earbud volume controls in soundcore. Original manual identifies these as touch controls. Phone-only volume controls are not substituted.","weight_g":"Current maker specifications state 5.2 g without case for the earbud. Tip size is not named. SoundGuys lists 5.7 g per bud without claiming that value as a measurement, so it is not imported into the measured-weight field or substituted for this maker claim.","compatible_platforms":"Exact maker FAQ covers phone use, Mac audio and Windows audio. App availability remains limited to Android and iOS.","platform_connections":"Maker computer-call FAQ explicitly gives Liberty 4 NC Hands-Free as both input and output on conferencing apps. This does not establish console support or USB audio.","feature_requirements":"Current maker FAQ states Android 8.0 minimum for LDAC, a firmware update to enable it, and mutually exclusive LDAC and multipoint. App 3.2.7 and later is the maker recommendation for full features, without asserting that this is the latest app version. Windows conferencing guidance specifically names the Hands-Free endpoint. The separate Mac computer guidance names Liberty 4 NC without that suffix. The visible requirement preserves both platform scopes.","sound_personalization":"Maker explicitly names HearID 2.0 and a tailored sound profile. Original manual also lists HearID sound. Exact retailer describes the hearing test used to create the profile.","variants":"Current US Velvet Black A3947Z11 sales SKU reference. Original QSG identifies hardware A3947. Service-index A3947C guide is documented separately, without a second unproved merchant row or universal revision equivalence claim.","model_numbers":"Current maker US product URL identifies sales SKU A3947Z11 for Velvet Black. A3947 is the original QSG hardware model. These identifiers are distinguished rather than presenting the sales SKU as a separate regulatory hardware model."}},{"url":"https://www.soundcore.com/products/liberty-4-nc-a3947z11","kind":"manufacturer_page","accessed":"2026-10-08","fields":["battery_life_claimed","charging_notes"],"notes":{"battery_life_claimed":"Exact playtime FAQ: Normal 10 h earbuds / 50 h total, ANC 8 h / 40 h, transparency 8 h / 40 h, LDAC with ANC 5 h / 25 h and LDAC without ANC 6 h / 30 h. The non-LDAC codec is not named, so AAC or SBC is not guessed. Tests use Anker laboratory default settings and 50 percent volume. The text normal-mode qualifier is not applied to ANC/LDAC rows as a contradictory operating setting. Call row is the separately stated ANC-off 4.5 h. ANC-on calls 4 h cannot be distinguished by the call enum, so are qualified here rather than duplicated with no visible ANC distinction. Case figures mean earbuds plus case recharges, as explicitly confirmed by the original manual, not extra case runtime alone.","charging_notes":"Component-specific full-charge times come from the current maker FAQ. The original manual table only says up to 3 hours without component scope, so that generic table alone does not establish earbud-only timing. Input 5 V / 0.8 A is literal. No accepted charging watts are derived. Current A3947C guide separately lists a compatible Anker A2337 30 W adapter, which is not a bundled adapter or device input rating."}},{"url":"https://salesforce-knowledge-download.s3.us-west-2.amazonaws.com/000012513/en_US/000012513.pdf","kind":"manual","accessed":"2026-10-08","fields":["manual_url","drivers","driver_type","frequency_response_hz","impedance_ohm","battery_capacity_mah","case_battery_capacity_mah","wireless_range_m","charging_port","wireless_charging","ear_tip_sizes","single_bud_use","wear_detection","virtual_surround","gesture_controls"],"notes":{"manual_url":"Original A3947 User Manual linked by the current official service index. Its English APP, WEARING, CONTROLS, LDAC, WEARING DETECTION and SPECS sections were read. The separately listed newer A3947C guide has the same core specification table, but no universal hardware-revision equivalence is asserted.","drivers":"SPECS explicitly identifies an 11 mm dynamic driver unit. A separately stated physical transducer count was not found, so no count is inferred from a single listed row.","frequency_response_hz":"SPECS publishes acoustic 20 Hz to 40 kHz response. Measurement tolerance, codec and test level are not stated. This is separate from codec transmission sample rate.","battery_capacity_mah":"SPECS explicitly states 53 mAh x 2 earbuds, so 53 mAh per bud. Typical versus rated capacity and nominal cell voltage are not labelled.","case_battery_capacity_mah":"SPECS explicitly identifies 800 mAh charging-case capacity. No output capacity or energy conversion is substituted.","wireless_range_m":"Published Bluetooth range 10 m / 33 ft. The direct metric claim is used, without converting the rounded feet value.","single_bud_use":"The complete CONTROLS table separately describes Mono mode and left/right controls. Either earbud can be worn alone, with a reduced mono control set.","virtual_surround":"APP explicitly lists 3D surround sound. This is virtual processing, without inferring head tracking or native multichannel input.","gesture_controls":"Original manual defaults differ slightly from the SoundGuys firmware 03.82 table. Manufacturer defaults are retained. App assignments remain customizable.","ear_tip_sizes":"WEARING diagram explicitly shows XS, S, M and L. The reference retail box confirms four pairs with one fitted pair."}},{"url":"https://salesforce-knowledge-download.s3.us-west-2.amazonaws.com/000012512/en_US/000012512.pdf","kind":"manual","accessed":"2026-10-08","fields":["model_numbers","anc_claimed_attenuation_db","warranty_years"],"notes":{"model_numbers":"Original official Quick Start Guide explicitly prints Model A3947 and document 51005003876 V2. A3947Z11 is the US Velvet Black sales SKU, distinct from the hardware identifier. The service index also lists an A3947C guide, without proving a different hardware specification.","anc_claimed_attenuation_db":"Manufacturer QSG states that SGS lab testing found up to 38 dB at the deepest attenuation band and up to 19 dB comprehensive reduction. The exact frequency and method are not printed. The 98.5 percent headline is identified with the deepest-band performance, without conversion to dB. This is a maker-published claim, not an independently retrieved reviewer overall result.","warranty_years":"Original official QSG CUSTOMER SERVICE states an 18-month limited warranty, converted to 1.5 years. Its additional-consumer-rights note distinguishes the warranty from statutory rights. Optional paid soundcore Care is separate."}},{"url":"https://www.prnewswire.com/news-releases/liberty-4-nc-with-enhanced-adaptive-active-noise-cancelling-system-now-available-on-amazon-and-soundcorecom-301867453.html","kind":"press_release","accessed":"2026-10-08","fields":["launch_price_usd","anc_type","driver_diaphragm_material"],"notes":{"launch_price_usd":"Maker-issued June 29, 2023 release explicitly prices all five colours at USD 99.99. Current sale prices are not launch evidence.","anc_type":"Maker describes both an external sound sensor and an in-ear sound sensor for environmental and ear-canal noise detection. This maps to the schema hybrid ANC definition. Physical ANC microphone quantity is not inferred.","driver_diaphragm_material":"Maker-issued June 29 release identifies the custom 11 mm driver as made of Liquid Crystal Polymer (LCP). This records the diaphragm material, without applying the polymer claim to the housing or voice coil."}},{"url":"https://www.soundguys.com/anker-soundcore-liberty-4-nc-review-100100/","kind":"review_site","accessed":"2026-10-08","fields":["bluetooth_codecs","wireless_charging_standards","eq_bands","anc_levels","wind_noise_reduction","stabilizers","measured_battery_life"],"notes":{"bluetooth_codecs":"Exact A3947 review lists SBC, AAC and LDAC. LHDC or later-family LE Audio is not transferred.","wireless_charging_standards":"Battery section explicitly describes charging the case on a Qi pad. Magnetic alignment, Qi2 and charging wattage are not inferred.","eq_bands":"Reviewer explicitly identifies eight independent custom equalizer bands, separate from its 22 preset effects. Full named preset list was not recovered, so preset names are not invented.","anc_levels":"Reviewer identifies five manual strengths. Adaptive operation and transport profiles are separate and not counted as extra fixed strengths.","wind_noise_reduction":"Reviewer explicitly identifies a user-selectable wind-reduction option in the ANC controls. This is distinct from microphone call-noise AI.","stabilizers":"Review FAQ explicitly says there are no stabilizers or over-ear hooks. This is direct negative evidence, not an omission from a box list.","measured_battery_life":"SoundGuys purchased and reviewed exact A3947 Navy/Cosmic Blue hardware, firmware 03.82. With ANC enabled, one earbud charge ran 9 h 53 min, converted to hours. The linked general testing article does not specify the original test codec, host, level or ANC strength, so those settings remain unknown. This is a named reference test sample, not a measurement of every later production revision. The maker current 8 h ANC claim uses different published default/50-percent conditions, so the figures are not assumed directly comparable. The review case 50-hour discussion is not stored as a measured total."}},{"url":"https://www.crutchfield.com/p_318A3947Z1/Anker-Soundcore-Liberty-4-NC.html","kind":"retailer","accessed":"2026-10-08","fields":["hearing_test","ear_tip_materials","in_the_box","cables_included"],"notes":{"hearing_test":"Exact US Velvet Black retailer public indexed description states that HearID tests hearing and creates a tailored sound profile. This is consumer sound personalization, not medical diagnostic clearance.","in_the_box":"Exact US Velvet Black retailer public indexed box list was captured October 8, 2026. Full ordinary web open later showed only the footer and local requests returned an access challenge. No bypass attempted. Four tip pairs include one installed pair. Charging adapter and optional soundcore Care are not listed.","ear_tip_materials":"Exact US Velvet Black retailer indexed box list explicitly states four pairs of silicone tips. The current manufacturer manual independently lists XS, S, M and L.","cables_included":"Retailer explicitly lists one USB-A to USB-C cable. Retailer length 12 inches differs from SoundGuys 0.33 m, so length is omitted rather than reconciling rounded or regional cable figures."}},{"url":"https://salesforce-knowledge-download.s3.us-west-2.amazonaws.com/000019752/en_US/000019752.pdf","kind":"manual","accessed":"2026-10-08","fields":["battery_capacity_mah","case_battery_capacity_mah","drivers","frequency_response_hz","impedance_ohm","bluetooth_version","wireless_range_m","feature_requirements"],"notes":{"battery_capacity_mah":"Current official service-index A3947C English guide has the same complete core table: 53 mAh x 2 earbuds, 800 mAh case, 11 mm dynamic, 20 Hz to 40 kHz, 10 ohms, Bluetooth 5.3 and 10 m. This corroborates the published hardware facts without proving universal performance equivalence between revisions.","feature_requirements":"LDAC section explicitly requires Android 8.0 or later and excludes two-device connection while LDAC is enabled. Additional regulatory and security sections are not treated as proof that old reviewed firmware is current."}},{"url":"https://www.rtings.com/headphones/reviews/anker/soundcore-liberty-4-nc-truly-wireless","kind":"review_site","accessed":"2026-10-08","fields":["quick_charge_playback_h"],"notes":{"quick_charge_playback_h":"Public Office paragraph explicitly describes four hours of playback after ten minutes of charging in the case. The numerical battery/latency/isolation tables are members-only and were not accessed or bypassed."}},{"url":"https://www.prnewswire.com/news-releases/liberty-4-nc-with-enhanced-adaptive-active-noise-cancelling-system-now-available-on-amazon-and-soundcorecom-301867453.html","kind":"press_release","accessed":"2026-10-08","fields":["release_date"],"notes":{"release_date":"Maker-issued June 29, 2023 release explicitly says shipping began that day on Amazon and soundcore.com. SoundGuys June 20 date is not substituted for actual retail shipping."}}],"fields_filled":81,"updated":"2026-10-16"},"meta":{"api_version":"1","docs":"https://arkivo.dev/api"}}