HUAWEI FreeBuds 6 continues the unique design of the previous model, with a significantly smaller size, making it lighter and more comfortable to wear. HUAWEI FreeBuds 6 is equipped with a dual-magnet dynamic driver + an ultra-high frequency micro planar driver, with bass extending to 14Hz and highs extending to 48kHz. It has a 2.3Mbps lossless transmission capability, can listen to up to 48kHz/24bit lossless music, and has obtained HWA Lossless and Hi-Res Wireless certification. It supports head tracking spatial audio to further enhance the sense of presence.
The HUAWEI FreeBuds 6 supports semi-open Active Noise Cancellation (ANC), reducing external noise interference. Leveraging a bone-conduction microphone and multi-channel noise cancellation algorithms, it ensures clear call quality even in environments with 95dB noise or 8m/s wind speeds. The earbuds also support head-gesture controls – nod to answer calls and shake your head to reject them. Intelligent charging technology learns user habits to extend battery life. With up to 6 hours of playback on a single charge and 36 hours total (with the charging case), the FreeBuds 6 also supports fast charging and wireless charging.
Previously, we’ve disassembled other HUAWEI products, including the Huawei FreeBuds Pro 3, Huawei FreeBuds SE 2, Huawei FreeBuds 5, Huawei FreeBuds Studio, Huawei FreeLace Pro 2, Huawei Sound SE, Huawei Sound Joy, Huawei WATCH GT5, Huawei WATCH FIT 3, Huawei WATCH Buds, Huawei WATCH GT Cyber, Huawei FreeClip, and more. Now, let’s dive into the detailed teardown of the HUAWEI FreeBuds 6.
01/ HUAWEI FreeBuds 6 Charging Case Teardown
Remove the charging case shell and take out the charging bin structure. The wireless charging receiving coil is fixed on the inner cavity. The front of the charging bin is equipped with a bracket to fix the motherboard and FPC.
The battery and speaker are fixed on the bracket on the back of the charging bin.
The function button FPC structure on the side of the charging bin.
Take out the wireless charging receiving coil.
Remove the bracket structure on the charging bin.
Remove all components fixed on the bracket.
The charging case has a built-in speaker for the search function sound.
After actual measurement, the speaker is about 15mm long and about 6mm wide.
The charging case has a built-in lithium-ion polymer battery, model: HB751834ENW-11, rated capacity: 510mAh 1.97Wh, nominal voltage: 3.87V, charging limit voltage: 4.45V, made in China.
The charging case has an internal FPC circuit.
The FPC is connected to the BTB connector male socket of the motherboard.
Function button for bluetooth pairing.
LED indicator for feedback of bluetooth pairing and charging status.
Metal dome for charging the earbuds.
The circuit on one side of the charging case motherboard.
The circuit on the other side of the charging case motherboard.
M24A IC, 6N23 IC, 3015 IC, S2TBN IC.
Southchip SC8753 high-efficiency direct charging chip, designed for TWS.
ConvenientPower CPS4520A wireless charging receiver chip, compliant with WPC Qi 1.3 protocol. Supports 5W output power. Supports efficient AC/DC voltage regulation, Rx Tx communication, I2C interface communication with MCU, and has reliable overvoltage/current/temperature protection scheme.
IC with silkscreen NZDX9F.
IC with silkscreen N2833W1120.
Laser engraved TL320 crystal oscillator, used to provide clock.
The second Southchip SC8753 high-efficiency direct charging chip, the two chips charge two earbuds respectively.
Renesas DA9168 battery charging management chip. Built-in dual independent LDO and reverse boost function, can support USB On-The-Go (USB-OTG) standard, with extremely low static current consumption and very compact footprint, making it very suitable for a large number of space-conscious battery-powered consumer product applications.
BTB connector female socket connected to FPC.
02/ HUAWEI FreeBuds 6 Earbuds Teardown
Remove the inner cover of the earbud stem, and set the steel shell button battery inside the cavity.
Take out the battery and remove the battery FPC.
A lithium battery protection IC with silk screen 4Y nv is set on the FPC.
Parameters of steel shell button battery – rated capacity: 39.5mAh, nominal voltage: 3.88V.
The internal structure of the cavity, the touch detection sensor is attached to the bottom, and the FPC on the cavity wall connects the charging contacts and the call microphone.
Disassemble the earbud head, and there is a speaker inside the front cavity.
The internal structure of the rear cavity is isolated from the sound cavity by a double cover.
Remove the dynamic unit structure.
The earbud has a built-in bass dynamic unit. According to the official introduction, it adopts a dual magnetic circuit design, which is responsible for the mid-bass part and can extend to 14Hz.
After actual measurement, the diameter of the dynamic unit is about 10.78mm.
Take out the FPC inside the front cavity.
Remove the transparent cover inside the back cavity.
Remove the motherboard and FPC inside the earbud stem. The touch detection patch inside the cavity is connected to the motherboard through the BTB connector.
Motherboard and FPC circuit inside the earbud.
Remove the bracket on the motherboard.
The LDS laser antenna is printed on a large area on the bracket, and a feedforward noise cancellation microphone pickup hole is set.
The MEMS microphone of the laser carving G033 is a call microphone.
SiP (System in Package) system-level package Huawei self-developed Kirin A2 chip”.
The second MEMS microphone of the laser carving G032 is a feedforward noise cancellation microphone, which is used to pick up external environmental noise.
IC with KU printed on the screen. The right side is equipped with Sunlord SDCL0603Q series multilayer ceramic inductor (above) and SDCL0402H-01 series multilayer ceramic inductor (below).
Sunlord SDCL0603Q series products achieve high Q value and high self-resonant frequency (SRF) through carefully designed coils and electrodes. They are made by laminated dry process and can provide high-precision and high-consistency products to meet the stringent requirements of precision electronic components.
Sunlord SDCL0402H-01 series multilayer ceramic inductor, with laminated structure to ensure reliability and production efficiency, has high Q value and high self-resonant frequency (SRF) and other characteristics.
Six-axis gyroscope with AN CJ8 printed on the screen is used to track head movement for spatial audio.
CellWise CW2215B lithium battery fuel gauge chip, with 5μA ultra-low power consumption and support current detection.
Southchip SC7289 linear charging IC.
The bone conduction VPU with a silk-screen QR code is used to accurately identify bone conduction vibration sounds and improve the sound pickup effect.
The third laser-engraved G032 MEMS microphone is a feed-back noise cancellation microphone, which is used to pick up sound from inside the ear canal to further improve the noise cancellation effect.
The optical in-ear detection sensor is used to automatically pause the playback when the headphones are taken off and automatically resume the playback after wearing them.
Micro-flat tweeter.
All components of HUAWEI FreeBuds 6 true wireless noise cancellation earphones.
03/ Summary
The HUAWEI FreeBuds 6 retains the signature design of its predecessor while offering premium build quality. The charging case has a rounded, compact form factor for portability. The stem-style in-ear earbuds adopt a teardrop shape with a smooth, skin-friendly glossy finish.
The charging case is equipped with a 510mAh/3.87V lithium battery from ATL. The motherboard uses the ConvenientPower CPS4520A wireless charging receiver chip, the Renesas DA9168 battery charging management chip, and the Southchip SC8753 high-efficiency direct charging chip solution. It also has a built-in 15mm x 6mm speaker for the finding function.
The earbuds use a 39.5mAh/3.88V steel shell button battery. They are equipped with a dual magnetic dynamic driver and an ultra-high frequency micro planar driver. They have three MEMS microphones + bone conduction VPU for sound pickup. The main control chip is the Kirin A2 chip in SiP package. They also use Southchip SC7289 linear charging IC, CellWise CW2215B lithium battery fuel gauge chip, Sunlord SDCL0603Q series and SDCL0402H-01 series multilayer ceramic batteries, etc.
PS: Translated from 52audio