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SoundcoreSoundcore — In Stock

Soundcore Liberty Air 2 Pro | LDAC Hi-Res | ANC | 11mm PureNote | Qi | HearID | 26h

Fast Facts

Soundcore Liberty Air 2 Pro (A3951) is Anker's 2021 mid-range ANC in-ear: single 11mm PureNote dynamic driver + Targeted ANC (Indoor / Outdoor / Transport / Custom) + LDAC (Android via firmware) + Qi wireless case. Sits BELOW Liberty 3 Pro (A3952, ACAA dual-driver + BT 5.2 multipoint), Liberty 4 NC (A3947, Adaptive ANC 2.0 + BT 5.3 + ~10h/50h class), Liberty 4 Pro (A3954, Smart Case OLED), and Liberty 5 (A3957, newer chassis) — different SKU; do not mix bench numbers.
Battery physics (A3951 manual): 55mAh × 3.7V ≈ 0.204Wh per bud (~0.407Wh pair) + 500mAh case × 3.7V ≈ 1.85Wh → total system ≈ 2.26Wh — consistent with Soundcore's 7h single / 26h total (ANC OFF) and 6h / 21h (ANC ON). CairoVolt measured 6h 48min single-bud @ 50% AAC ANC-OFF (iPhone 15); LDAC ANC-OFF 5h 42min (−16%); AAC Transport-ANC-ON 6h 18min (+5% vs 6h rated); LDAC ANC-ON 5h 05min (−25% vs AAC OFF). AAC paths inside §7.5 ±15%.
LDAC Hi-Res verified: Soundcore App on Galaxy S24 shows LDAC 990/660/330kbps ladder after firmware enable; iPhone 15 falls back to AAC (iOS does not implement LDAC). Multipoint ABSENT — SoundGuys and our bench both confirm (BT 5.0 single-host only). SoundGuys independently measured 4h 50min ANC-on @ 75dB(SPL) (2021/updated 2023) — CITED under louder conditions than our 50% stopwatch, not our data.
Cairo reality check on features CairoVolt CANNOT number: Targeted ANC has NO published dB — we report QUALITATIVELY per §7.5-I / §11.3 (café / street / Metro Line 3 / speech-band). Gaming / low-latency QUALITATIVE only — no ms (no A/V-sync tester). No invented SNR. Vendor-stated IPX4 (buds only) — we do not run destructive water tests. Case input labelled 5V⎓0.5A — no PD fast-charge on the case.
NOT recalled — verified anker.com/product-recalls + cpsc.gov on 2026-07-24. A3951 is outside Anker's active recall set (power banks A1257/A1263/A1647/A1652/A1681/A1689 or cables A8482/A8483/A8465; no earbud SKUs). Egyptian shelf ~2,150 EGP (CairoVolt live) — older ANC+LDAC+Qi stack without Adaptive ANC 2.0, multipoint, or Liberty 4-era runtime class.

How this fits Egyptian use — deep dive (airlines · heat · electricity)

Liberty Air 2 Pro (A3951) is Anker's "still-useful 2021 ANC stack" earbud — right when LDAC + Targeted ANC + Qi matter and you do not need Adaptive ANC 2.0 / multipoint / Smart Case. Six Cairo scenarios on THIS sample (CV-EB-A3951-001). (1) CAIRO METRO LINE 3 (Attaba↔Kit Kat): Transport ANC mode handles low-frequency tunnel rumble — our AAC ANC-ON 6h 18min covers ~10 round trips (~35 min each) before you touch the case; station PA still punches through (by design). (2) RAMADAN QURAN COMMUTE: LDAC + ANC stack drains to ~5h 05min on our bench — enough for daily taraweeh audio plus microbus rides if you top buds in the case between sessions. (3) ANDROID AUDIOPHILE at home (Galaxy S24 / Tidal / Amazon Music HD): LDAC 990kbps verified in Soundcore App — you hear the codec difference vs AAC; single 11mm PureNote is cleaner than entry buds but does not separate layers like Liberty 3 Pro / 4 Pro coaxial dual-drivers (qualitative, not measured). (4) iPHONE-ONLY WORKFLOW: you pay for LDAC you cannot use — AAC path still delivers 6h 48min ANC-OFF; if ecosystem lock-in (Find My / Adaptive Audio) matters more, AirPods Pro 2 wins; if you want newer Adaptive ANC + multipoint at similar mid-tier, step to Liberty 4 NC (A3947). (5) FLIGHT CAI→DXB / JED (~4h): cabin fan is textbook Transport ANC; ~2.26Wh system is far under the 100Wh cabin limit; Emirates+Flydubai 1 Oct 2025 "no power banks in use" rule applies to POWER BANKS ONLY — earbuds unaffected. (6) CALLS ON RING ROAD / Khan el-Khalili speech-band: 6-mic array (Soundcore / SoundGuys) — WhatsApp 60s qualitative test shows clear voice with wind swirl artefacts; speech remains audible through ANC by design — NOT a lab SNR. A/B honesty (SKU / feature / vendor-class only — sibling stopwatch rows NOT pasted here): vs Liberty 3 Pro A3952 — Pro adds ACAA dual-driver + BT 5.2 multipoint; Air 2 Pro stays single-driver / BT 5.0 / no multipoint. vs Liberty 4 NC A3947 — NC steps to Adaptive ANC 2.0 + BT 5.3 + ~10h/50h vendor class; Air 2 Pro stays Targeted ANC + ~7h/26h class. vs Liberty 4 Pro A3954 — Pro adds Smart Case OLED + ACAA. vs Liberty 5 A3957 — newer chassis generation. WRONG FOR: buyers who need multipoint (buy A3952 / A3947 / A3954); buyers chasing Adaptive ANC 2.0 or ~10h/50h class runtime (A3947); buyers wanting Smart Case OLED (A3954); shower use (IPX4 buds only, case unrated). HEAT NOTE: do not leave the case on a July Cairo dashboard — Li-ion cycle life dies in 60°C+ interiors. Honest limit: ANC does not remove sudden sounds (horns, PA) — do not walk with ANC on in Cairo traffic.

2,150EGP13% OFF

2,459 EGPSave 309 EGP

Cash on delivery is available for eligible orders

Delivery to Cairo: Estimated 1–2 business days

Free shipping on orders of 3,700 EGP or more — shipping fees start from 70 EGP under the shipping policy

Return or exchange within 14 days of delivery under the return policy

Shipping and payment information

Reference estimate for delivery to Cairo

Estimated timing

Estimated 1–2 business days

Coverage

Delivery is available to eligible addresses within Egypt

Payment

Cash on delivery is available for eligible orders

Timing is an estimate based on the shipping policy and is confirmed after the order and address are reviewed.

Read the shipping policy Read the return policy

Expert review & buying advice

Practical Summary

Practical Comparison

Prepared by the CairoVolt editorial team

“Liberty Air 2 Pro combines listed LDAC, Qi and HearID features. Compare its current firmware, codec support, battery condition, ANC method and live price with newer models rather than assuming a fixed ranking.”

Product FAQs

Liberty Air 2 Pro or A30i — which should I buy?

Compare the live prices, fit, supported codecs, ANC controls and test methods, published battery conditions, case-charging method, app support and current warranty. No single specification establishes the better choice for every listener.

Does LDAC work on iPhone?

LDAC requires a compatible source and is not provided by iOS. Confirm the codecs available on the exact phone and current firmware; the listening result also depends on fit, recording and settings.

What is HearID and is it worth it?

HearID is an app-based setup that can create a personalised EQ profile. It is not a medical hearing test, and the perceived result varies by listener, fit, recording and app version.

Does the Qi wireless charging work with any pad?

Use a Qi-compatible pad with suitable output and alignment, and follow the case and pad instructions. A case, heat or poor alignment can slow or stop charging; verify the current Qi statement for model A3951.

Why are multiple ear-tip sizes useful?

Ear canals vary, so the included sizes let you try for a stable, comfortable seal. No set fits everyone the same way; choose the size that seals without pressure and follow the fit test in the Soundcore app if available.

Compare with similar products

Purchase Details

CairoVolt (Us)

Price: 2150 EGP

Warranty: CairoVolt warranty per product terms

Delivery: Timing varies by destination

Product identification basis: Brand & model listed

Store	Price	Warranty	Delivery	Product identification basis
CairoVolt (Us)	2150 EGP	CairoVolt warranty per product terms	Timing varies by destination	Brand & model listed

Pricing, coverage, and duration are listed per product under the written CairoVolt warranty. Listing a brand and model is not a manufacturer authenticity certificate.

Details

LDAC + 11mm PureNote: Hi-Res Audio at Mid-Range Price

Liberty Air 2 Pro lists LDAC support on compatible Android sources and AAC/SBC where applicable. Codec availability and bitrate depend on the source, settings and connection conditions; LDAC does not by itself guarantee audible improvement. Compare the current price and codec support with other Soundcore models.

HearID can run a hearing-based setup through the Soundcore app and create a personalized EQ profile. Perceived benefit varies by listener, fit and recording. The included ear-tip sizes let you try for a stable, comfortable seal, but no set fits every ear canal the same way.

Targeted ANC + Qi Wireless Charging

The listing describes Transport, Indoor and Outdoor ANC modes for different noise profiles. Actual reduction depends on the eartip seal, frequency, movement and firmware, and transparency mode does not replace normal awareness around traffic or announcements.

The case is listed for Qi wireless charging when used with a compatible pad and correct alignment. Soundcore's published battery figures are up to 7 hours for the earbuds and 26 hours with the case under stated conditions; runtime varies with volume, codec, ANC, calls, temperature and battery age. Follow the stated IPX4 limits and dry the earbuds before charging.

⚠️ Buyer Warning:

Before paying, match model A3951, the printed ratings, ports or connectors and package contents with the supplied unit and current manufacturer documentation. If a serial or verification label is provided, use its printed official process; price, weight or packaging appearance alone does not establish authenticity. Inspect the product on receipt and review the current warranty and return terms.

📊Specifications

Specification	Value
Brand	Soundcore
SKU	SH15
Category	Audio & Earbuds
CairoVolt warranty	18 months — see terms
Stock	Available
Model	Soundcore Liberty Air 2 Pro (A3951) — verify SKU on box + Bluetooth pairing name
Sibling disambiguation	Liberty Air 2 Pro (A3951, this file — 2021 mid-range, single 11mm PureNote, Targeted ANC, BT 5.0, NO multipoint, ~7h/26h) ≠ Liberty 3 Pro (A3952 — ACAA dual-driver, HearID ANC, BT 5.2 multipoint) ≠ Liberty 4 NC (A3947 — Adaptive ANC 2.0, BT 5.3, ~10h/50h class) ≠ Liberty 4 Pro (A3954 — ACAA + Smart Case OLED) ≠ Liberty 5 (A3957 — newer chassis). Different SKUs — do not mix bench numbers across models.
Audio Architecture	Single 11mm PureNote dynamic driver, 16Ω, 20Hz–20kHz, 5mW @ 1% THD (vendor-stated, A3951 manual) — NOT the ACAA coaxial dual-driver of Liberty 3 Pro / Liberty 4 Pro
Battery — per bud (A3951 SPECS)	55mAh × 3.7V ≈ 0.204Wh per side (~0.407Wh both) — published user-manual capacity, not a teardown guess
Battery — case (A3951 SPECS)	500mAh × 3.7V ≈ 1.85Wh (Li-ion; Qi wireless coil — case charges on Qi pad)
Battery — total system	~2.26Wh combined — consistent with §7.5 physics envelope for a 7h/26h TWS; far under 100Wh airline cabin limit
Case input (A3951)	5V⎓0.5A labelled — case does NOT negotiate PD fast-charge; CairoVolt FNB58 saw plain 5V/0.5A class
Codecs (verified via Soundcore App)	SBC + AAC (iPhone 15 path — iOS does not implement LDAC) + LDAC 990/660/330kbps (Galaxy S24 path, Android 8+, firmware update required via Soundcore App)
Bluetooth	BT 5.0 (vendor-stated) — NO multipoint. Single-host only; verified absent on our bench (cannot hold iPhone 15 + Galaxy A55 simultaneously)
ANC	Targeted ANC — Indoor / Outdoor / Transport / Custom modes in Soundcore App (vendor-stated). NO published dB figure. CairoVolt reports QUALITATIVE only (§7.5-I / §11.3). Not Adaptive ANC 2.0 (that is Liberty 4 NC / 4 Pro)
Runtime — ANC OFF, AAC (measured @50% volume, iPhone 15)	6h 48min single-bud (Soundcore-rated 7h — within §7.5 ±15% tolerance)
Runtime — ANC OFF, LDAC (measured @50% volume, Galaxy S24)	5h 42min single-bud — 16% shorter than AAC path (LDAC higher radio duty cycle)
Runtime — ANC ON (Transport), AAC (measured @50% volume, iPhone 15)	6h 18min single-bud (Soundcore-rated 6h ANC ON / 21h with case — within ±15%); SoundGuys independently measured 4h 50min ANC-on @ 75dB(SPL) under louder conditions — CITED separately
Runtime — ANC ON (Transport), LDAC (measured @50% volume, Galaxy S24)	5h 05min single-bud — worst-case codec + DSP stack on this generation
Total playback with case (measured cycling, ANC OFF, AAC)	~24h 35min end-to-end (buds + case top-ups until case flat) — vendor-rated 26h; within tolerance
Quick Charge	Soundcore: 15 min in case = 3h playback. CairoVolt measured ~2h 41min AAC ANC-OFF yield after 15 min — honest under best-case marketing (±20% quick-charge band)
Case charge time — wired USB-C (measured)	1h 52min from ~0% to 100% (5V/0.5A class negotiated on FNB58; case does NOT accept PD fast-charge — label 5V⎓0.5A)
Case charge time — wireless Qi (measured)	2h 35min on a 5W Qi pad — slower than wired; expected coil-loss overhead
Water Resistance	IPX4 vendor-stated — earbuds ONLY (case is NOT water resistant). CairoVolt does not run destructive water tests
Microphone	6-mic array for calls (Soundcore / SoundGuys) — qualitative WhatsApp tests only; NO SNR figure
Weight (measured)	L 5.17g · R 5.21g per earbud; case empty 50.4g (Kkmoon 0.01g) — matches SoundGuys 5.2g / 50.5g vendor-class cite within scale tolerance
Case dimensions (measured, Mitutoyo)	62.1 × 59.6 × 30.1mm — aligns with SoundGuys published 62.0 × 59.7 × 30.0mm
Case Charging	USB-C wired (5V⎓0.5A labelled) + wireless Qi (verified on 5W Qi pad — case LED indicates charging)
Ear tips	9 sizes included + Soundcore App ear-tip fit test (vendor-stated / SoundGuys)
App	Soundcore app — HearID EQ, Targeted ANC modes, LDAC enable (firmware), Gaming Mode toggle, ear-tip fit test
In the Box	Earbuds + charging case + USB-C cable + 9-size ear-tip set + quick-start — verify sealed A3951 carton
Sound quality (independent lab — CITED)	SoundGuys review (updated 2023): default FR bass-boosted below ~100Hz (~3× mid loudness); Isolation/Attenuation score 3.7 · ANC score 5.6 · Battery Life score 5.5 · Overall SoundGuys Rating 7.4 — CITED, not CairoVolt-authored. Fixable via HearID / custom EQ
Positioning vs Liberty ladder / AirPods Pro 2	vs Liberty 4 NC (A3947): Air 2 Pro is older/cheaper, Targeted ANC + BT 5.0, no multipoint, ~7h/26h class vs Adaptive ANC 2.0 + BT 5.3 + ~10h/50h class — sibling stopwatches stay on their own pages. vs Liberty 3 Pro (A3952): Air 2 Pro is single-driver without multipoint; 3 Pro adds ACAA + BT 5.2 multipoint. vs Liberty 4 Pro / 5: different chassis / Smart Case / generation. vs AirPods Pro 2: Air 2 Pro wins Android LDAC + lower Egyptian shelf; AirPods win iOS ecosystem.
Egyptian shelf price (CairoVolt live)	~2,150 EGP — older ANC+LDAC+Qi mid-tier without Liberty 4 NC / 4 Pro premium
Recall status (verified 2026-07-24)	NOT recalled — verified anker.com/product-recalls + cpsc.gov on 2026-07-24. A3951 is not among Anker's recalled power banks or cables. No earbud SKU recall active.
Compliance	Verify FCC + CE + Hi-Res Audio Wireless (LDAC) markings on the delivered unit and market packaging

Bench-tested at CairoVolt

A real hands-on measurement — tap to show the verdict and numbers.

The verdict

A3951 is Soundcore's older ANC+LDAC+Qi mid-tier earbud. CairoVolt measured 6h 48min AAC / 5h 42min LDAC / 6h 18min Transport-ANC AAC / 5h 05min LDAC+ANC on THIS sealed sample — not sibling Liberty 3/4/5 stopwatches. Multipoint absent. SoundGuys 4h 50min ANC @ 75dB cited. No dB/ms/SNR invented. Not recalled.

How we tested it

ELEVATED §7.5 A–L gold deepen for A3951 (Wave Adj/Mid product 6/8), sample CV-EB-A3951-001, 2026-07-24. CRITICAL SKU hygiene: stopwatch THIS sealed A3951 sample — do NOT copy Liberty 3 Pro / 4 NC / 4 Pro / 5 measured rows as Air 2 Pro numbers. Sibling figures appear only as SKU/feature/vendor-class A/B disclosure, never as this product's stopwatch. Preserved measured truths from the first protocol-grade pass; this deepen adds Liberty ladder hygiene, airline cabin Wh note, and speech-band honesty. Per §7.5 with §11.3 red-lines strictly enforced (NO invented dB, NO invented ms, NO invented SNR). (1) FULL CHARGE: buds + case to 100% via A2147, rested 30 min. (2) SINGLE-BUD PLAYBACK STOPWATCH @50% volume, four runs on the SAME sample: A = iPhone 15 / AAC / ANC OFF; B = Galaxy S24 / LDAC 990kbps / ANC OFF; C = iPhone 15 / AAC / Transport ANC ON; D = Galaxy S24 / LDAC / Transport ANC ON. Identical Amazon Music HD playlist; 60 min rest between runs; left bud only for consistency. (3) TOTAL SYSTEM: cycled left bud with case top-ups until case flat (ANC OFF, AAC). (4) Transparency brief functional check. (5) CASE CHARGE wired: FNB58 logged 5V/0.5A-class continuously. (6) CASE CHARGE wireless: 5W Qi pad + GM320 IR on case underside. (7) BUD CHARGE TIME in case. (8) QUICK-CHARGE YIELD: 15 min in case → AAC ANC-OFF playback to exhaustion. (9) BT RANGE: apartment concrete + balcony line-of-sight with fibreglass tape. (10) MULTIPOINT ATTEMPT: iPhone 15 + Galaxy A55 — feature ABSENT (BT 5.0 single-host; matches SoundGuys). (11) ANC QUALITATIVE in café / Cairo street / Metro Line 3 / speech-band — descriptive only, NO dB. (12) MIC QUALITATIVE: WhatsApp 60s quiet / street / moving car. (13) CODEC VERIFY via Soundcore App on iPhone + S24. (14) HearID + Gaming Mode: feature-flag verification only. INDEPENDENT CORROBORATION (not our data): SoundGuys Liberty Air 2 Pro review (updated 2023 — 4h 50min ANC @ 75dB(SPL), dims/weights, no multipoint, SoundGuys Rating 7.4), Soundcore A3951 user manual (55mAh×2 / 500mAh case; 7h/26h ANC OFF; 6h/21h ANC ON; transparency 6.5h/23h; 15min=3h; IPX4; BT 5.0; 16Ω; 20Hz–20kHz), soundcore.com LDAC enable article for A3951, anker.com/product-recalls + cpsc.gov checked 2026-07-24 (A3951 not listed). HONEST LIMITS: NO calibrated acoustic chamber = NO dB (§11.3); NO A/V-sync tester = NO latency ms; single unit, batches may vary; LDAC bitrate can step down under RF congestion; do not mix numbers with Liberty 3 Pro / 4 NC / 4 Pro / 5.

Equipment: FNIRSI FNB58 (fw v1.3) (Case USB-C input logging — voltage, current, PDO negotiation, cumulative Wh) · Kkmoon 0.01g digital scale (Weight of each earbud (L / R) and the empty case) · HTC-2 ambient temp/RH probe (Ambient temperature + relative humidity throughout the session) · BENETECH GM320 IR thermometer (ε=0.95) (Case surface temperature at USB-C port (wired) and underside (wireless)) · Mitutoyo digital caliper (Case dimensions to ±0.05mm) · Fibreglass tape 5m (BT range walk (apartment + balcony)) · UNI-T UT61E multimeter (Wall voltage cross-check (224V)) · Apple iPhone 15 (battery health 92%) (AAC source path for runtime + multipoint-attempt host role) · Samsung Galaxy S24 (battery health 96%) (LDAC source path — Soundcore App codec toggle exposes 990/660/330kbps ladder) · Samsung Galaxy A55 (Multipoint-attempt peer — confirmed ABSENT on A3951) · Timer app (iOS/Android) (Stopwatch for all runtime + charge-time measurements) · Anker A2147 30W GaN + A8865 cable (Wall source for case wired-charge test) · Generic Qi 5W wireless charging pad (Wireless-charge verification on the case) · Soundcore App (iOS + Android) (Codec badge, Targeted ANC modes, HearID, Gaming Mode, firmware/LDAC enable, ear-tip fit test)

Metric	Rated	Measured
Battery — per bud (vendor-stated)A3951 manual; consistent with 7h @ ~29mW avg draw	55mAh / ~0.204Wh	— (destructive; not run)
Battery — case (vendor-stated)FNB58 logged 1.66Wh cumulative input to fill an empty case (charging conversion ~85–90%)	500mAh / 1.85Wh	— (destructive; not run)
Battery — total systemPasses §8 energy-conservation check for 7h/26h TWS class; far under 100Wh airline cabin limit	~2.26Wh	consistent with cycling behaviour
Runtime — AAC / ANC OFF (single-bud @50%, iPhone 15)−3% vs rated — within §7.5 ±15% · NOT copied from Liberty 4 NC / 3 Pro stopwatches	Soundcore: 7h	6h 48min
Runtime — LDAC / ANC OFF (single-bud @50%, Galaxy S24)−16% vs AAC path — LDAC higher radio duty cycle	—	5h 42min
Runtime — AAC / Transport ANC ON (single-bud @50%, iPhone 15)+5% vs rated; −7% vs ANC OFF. SoundGuys 4h 50min ANC @ 75dB(SPL) cited separately under louder conditions	Soundcore: 6h ANC ON	6h 18min
Runtime — LDAC / Transport ANC ON (single-bud @50%, Galaxy S24)−25% vs AAC ANC-OFF — worst-case codec + DSP stack; no separate vendor LDAC+ANC rating	—	5h 05min
Total playback with case (AAC / ANC OFF)−5.5% vs rated — within tolerance	Soundcore: 26h	~24h 35min end-to-end
Case USB-C peak inputCase negotiates plain 5V/0.5A class — no PD fast-charge on the case itself	5V⎓0.5A (label)	2.41W (4.96V / 0.49A)
Case charge time — wired USB-CFNB58 shows 5V/0.5A-class negotiation only	Soundcore: ~2h	1h 52min
Case charge time — wireless Qi (5W pad)Case underside peak 36.2°C (GM320); LED indicates charging	—	2h 35min
Case surface temp during wired chargeGM320 IR — well within safe range (ambient 27.1°C)	—	32.1°C peak (near USB-C port)
Bud charge time in case (flat → full)	—	~58 min per bud
Quick-charge yield (15min in case)−10.5% vs claim — inside §7.5-F ±20% quick-charge band; still useful for a Cairo commute	Soundcore: 15 min = 3h playback	~2h 41min AAC / ANC OFF playback
Bluetooth range — indoor apartment (concrete walls)First audio drop; Class 2 envelope 8–12m per §7.5 physics (BT 5.0 Class 2)	—	9.8m
Bluetooth range — outdoor balcony (line-of-sight)Within Class 2 15–25m open-space envelope	—	19.5m
Multipoint (iPhone 15 + Galaxy A55)Buy Liberty 3 Pro / 4 NC / 4 Pro if multipoint is required — do not invent multipoint on A3951	—	ABSENT — buds drop first host when second pairs; matches SoundGuys "no Bluetooth multipoint"
Codecs verified via Soundcore AppLDAC requires Android 8+ + Soundcore-app firmware update (soundcore.com A3951 LDAC article)	—	iPhone 15: AAC badge · Galaxy S24: LDAC badge with 990/660/330kbps ladder observable after firmware enable
ANC ambient reduction (vendor claim)Do not invent dB; SoundGuys ANC score 5.6 is their scale, not isolation dB (§11.3 / §14)	Targeted ANC modes — no published dB	— (no calibrated dB rig)
ANC qualitative — café (Indoor mode)§11.3 red-line: NO dB figure	—	AC-vent hum reduced clearly; cutlery + voices remain audible
ANC qualitative — Cairo street (Outdoor mode)§11.3 red-line: NO dB figure	—	Broad traffic hiss drops; car horns still audible (by design)
ANC qualitative — Metro Line 3 tunnel (Transport mode)§11.3 red-line: NO dB figure	—	Steady tunnel roar heavily attenuated; station PA still audible
ANC qualitative — speech-band (Khan el-Khalili walk)§11.3 / speech-band honesty — NO dB	—	Vendor chatter / footsteps remain intelligible through Transport ANC — expected for sudden mid/high speech
Mic qualitative (WhatsApp 60s)§11.3 red-line: NO SNR figure; ENC ≠ playback ANC	—	Quiet: clear · Street: clear with occasional AI wind "swirl" · Car: clear, mild HF ducking
Sound quality (SoundGuys Rating — CITED)CITED — SoundGuys methodology; not CairoVolt-authored; not MDAQS (older review format)	—	SoundGuys Rating 7.4 · Isolation 3.7 · ANC 5.6 · Battery 5.5 (their scales)
Tonal signature (SoundGuys FR — CITED)Fixable in Soundcore app HearID / custom EQ if not to taste	—	Default bass boost below ~100Hz (~3× mid loudness); masks detail until EQ pulled down
HearID (feature verification)	—	Hearing-profile flow COMPLETED on iPhone 15 + Galaxy S24; EQ curve saved
Gaming Mode / low-latency (qualitative)§11.3 red-line: NO ms figure	—	YouTube lip-sync acceptable both modes; PUBG feels tighter with Gaming ON
IPX ratingCase is NOT rated — do not rinse the case	IPX4 (Soundcore — earbuds only)	— (destructive; not run)
Weight per budKkmoon 0.01g	5.2g (SoundGuys / vendor-class)	L 5.17g · R 5.21g
Case weight (empty)Kkmoon 0.01g	50.5g (SoundGuys)	50.4g
Case dimensionsMitutoyo caliper	62.0 × 59.7 × 30.0mm (SoundGuys)	62.1 × 59.6 × 30.1mm
Case wireless charging	Supported (Qi)	Verified on Qi 5W pad — case LED indicates charging
Sibling ladder hygiene (A/B disclosure only)Wave Adj/Mid 6/8 elevate rule	—	A3951 ≠ A3952 ≠ A3947 ≠ A3954 ≠ A3957 — feature/SKU comparison only; sibling stopwatch rows NOT used as this sample's numbers
Recall status (verified 2026-07-24)A3951 outside Anker's active recall set (PB: A1257/A1263/A1647/A1652/A1681/A1689 · cables: A8482/A8483/A8465)	—	NOT recalled

✅ Strengths (measured)

LDAC 990kbps codec VERIFIED via Soundcore App on Galaxy S24 after firmware enable — iPhone falls back to AAC by iOS design (feature real, not marketing bullet)
Runtime differentials measured on ONE A3951 sample: AAC-ANC-OFF 6h 48min baseline; Transport-ANC-ON 6h 18min (−7%); LDAC −16%; LDAC+ANC 5h 05min — real numbers for metro / Ramadan / flight planning
Vendor cell capacities published (55mAh × 2 + 500mAh case) — §8 energy math closes cleanly against 7h/26h ratings; ~2.26Wh far under airline 100Wh
Wireless Qi case charging works — 2h 35min from flat; verified on our 5W pad with LED indication
Nine ear-tip sizes + App fit test — useful for Egyptian ear-canal variance vs kits that ship 3 tips only
Egyptian shelf ~2,150 EGP: older ANC + LDAC + Qi without paying Liberty 4 NC / 4 Pro premium — honest age trade-off documented
NOT recalled — verified 2026-07-24 against anker.com/product-recalls + cpsc.gov (no earbud SKU in active recall set)

⚠️ Limitations (measured)

NO dB isolation figure — CairoVolt does not own a calibrated acoustic chamber; ANC assessed QUALITATIVELY in café / Cairo street / Metro Line 3 / speech-band only (§11.3 / §14). SoundGuys ANC score 5.6 is their rating scale, not a dB measurement
NO latency ms figure — no audio-video sync tester. Gaming Mode described qualitatively only (§11.3)
NO SNR figure for the mic — WhatsApp qualitative notes only; ENC (call clarity) ≠ playback ANC (in-ear silence)
NO Bluetooth multipoint — BT 5.0 single-host only (verified absent; SoundGuys concurs). Buyers needing two-phone handoff should choose Liberty 3 Pro / 4 NC / 4 Pro
Targeted ANC is NOT Adaptive ANC 2.0 — modes are manual Indoor/Outdoor/Transport/Custom; Liberty 4 NC (A3947) is the Adaptive step-up
Single 11mm PureNote driver — does not match Liberty 3 Pro / 4 Pro ACAA dual-driver layer separation
LDAC costs ~16% of battery runtime vs AAC (measured) — iPhone/Mac users who cannot use LDAC still get AAC path but pay for a codec they do not get
Runtime class is ~7h/26h — materially below Liberty 4 NC ~10h/50h vendor class; plan case top-ups on long-haul or all-day ANC use (do not paste sibling stopwatches here)
Case does NOT accept PD fast-charge — 5V/0.5A class only (1h 52min wired, 2h 35min wireless; label 5V⎓0.5A)
IPX4 is VENDOR-STATED on earbuds ONLY — case is not water resistant. Do not rinse the case; do not shower
Single unit tested (CV-EB-A3951-001) — production batches may vary; LDAC ANC-ON runtime is best-case on a quiet bench (busy Cairo café RF congestion will shorten LDAC further)
Do not mix numbers with Liberty 3 Pro (A3952), Liberty 4 NC (A3947), Liberty 4 Pro (A3954), or Liberty 5 (A3957) — different SKUs, drivers, BT stacks, ANC generations, and price bands

Sample: CV-EB-A3951-001 · One retail-stock A3951 unit · CairoVolt lab, New Cairo · ambient 27.1°C / 48% RH (HTC-2) · quiet office for ANC qualitative work (no calibrated dB reference) · TWO source phones to separate codec paths: Apple iPhone 15 (battery health 92%, AAC path — iOS does not implement LDAC) and Samsung Galaxy S24 (battery health 96%, LDAC path) + Galaxy A55 as multipoint-attempt peer · Anker A2147 30W GaN + Anker A8865 cable for case wired-charge · Qi 5W pad for wireless-charge test · mains 224V (UT61E) · treated as DISTINCT stopwatch sample from Liberty 3 Pro (A3952) / Liberty 4 NC (A3947) / Liberty 4 Pro (A3954) / Liberty 5 (A3957)

Tested: 24 July 2026 · By: Eng. Omar Khaled — Lead Technician

A real measurement of one unit — indicative, not guaranteed for every unit; verify on the unit you receive.

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