As the new flagship TWS earbuds in 2022, Samsung named it Galaxy Buds2 Pro instead of Galaxy Buds Pro2. Perhaps it wanted to express that this is just an upgraded version of the mid-to-high-end product Galaxy Buds2 released in August 2021. It is still unknown whether there will be more top-level product releases in the future, but the Samsung Galaxy Buds2 Pro has brought many surprises.
In terms of appearance, the Samsung Galaxy Buds2 Pro still continues the family-style design. The charging case adopts a lightweight rounded square design, equipped with three colors of black, white, and purple, and cancels the color contrast design of Galaxy Buds2. The bean-shaped in-ear earbuds have been further optimized. Ergonomic design and enhanced air flow technology can effectively reduce the pressure on the ear canal and make it more comfortable to wear.
In terms of functional configuration, Galaxy Buds2 Pro supports the upgraded Samsung SSC codec, which can provide 24-bit high-fidelity audio. Supports 360 audio with dynamic head tracking, making the audio more stereoscopic and real. Support intelligent ANC function, and the noise cancellation performance is upgraded again. Support voice detection function, automatically turn off the noise cancellation mode and turn on the ambient sound effect. Equipped with neural network technology (DNN), with beamforming microphone and voice pickup unit, it brings clear voice call effect. Upgrade Bluetooth 5.3 to support LE Audio low-power audio in the future. It supports wireless charging, with a single battery life of up to 5 hours in ANC mode and a comprehensive battery life of 28 hours.
Samsung headphones that 52audio has previously teardown include: Samsung Galaxy Buds2, Samsung Galaxy Buds Pro, Samsung Galaxy Buds Live, Samsung Galaxy Buds+, Samsung Galaxy Buds, etc. Let’s take a look at the detailed teardown report of this product.
01/ Samsung Galaxy Buds2 Pro charging case teardown
Remove the charging case cockpit and the internal structure of the cavity.
The back of the charging cockpit is designed with brackets to fix the magnets that absorb the earbuds and charging case cover, as well as the indicator light guide column.
The components are also fixed by brackets in the cavity, and a circuit combining soft and hard boards is arranged on the top.
The flex cable connects to the motherboard through the BTB connector.
Remove the screws and take out the battery module. The battery is fixed in an independent frame, which plays a very good protective role. The information on the charging case built-in battery label, model: EB-BR510ABY, rated capacity: 500mAh/1.94Wh, typical capacity: 515mAh/1.99Wh, nominal voltage: 3.88V, charging limit voltage: 4.47V, from ATL.
The exposed copper of the battery cable is connected to the motherboard.
The silkscreen information on the battery cell is consistent with the external label.
The battery protection board circuit is equipped with an integrated lithium battery protection IC.
After taking out the battery, the internal circuit of the cavity.
The motherboard unit structure is fixed by screws and positioning posts.
After removing the upper cover, the entire motherboard assembly can be easily taken out.
The bottom structure of the cavity is provided with a fixing slot for the wireless receiving coil.
The structure on one side of the bracket fixes the main board and a circuit combined with a soft and hard board.
The wireless charging receiving coil is fixed on the back of the bracket.
Pogo Pin connector for charging earbuds.
LED indicator for feedback charging case charging status.
RGB LED indicators for feedback on bluetooth pairing and charging status.
The Hall element of the silk screen KZ 1eG is used to sense the magnetic field change when the charging case cover is turned on/off, and then inform the charging case MCU to control the pairing or disconnection of the earbuds with the connected device.
The circuit on the side of the motherboard of the charging case.
The circuits on the other side of the motherboard.
Metal dome for connecting battery cells.
Type-C charging base, spot-welded metal shell for fixing.
The Type-C input port protects the circuit, and the components are covered with waterproof glue.
ETEK ET9553M overvoltage protection IC.
Samsung self-developed power management chip with screen printing “S2MUA02X”. The single chip supports wired and wireless charging, and the peripheral circuit is very streamlined. This series of power management chips has been equipped on previous generations of products.
BTB connector socket for connecting cables.
The BTB connector male seat that connects the cable to the motherboard.
02/ Samsung Galaxy Buds2 Pro earbuds teardown
Enter the earbuds teardown section and open the earbud cavity along the parting line.
The inner structure of the rear cavity of the earbud adopts an injection molding process to fix the touch sensor. Printed LDS laser antenna, connected to the motherboard dome through metal contacts.
The two microphone holes are equipped with a sealing rubber ring structure to improve the radio performance.
The mold clamping structure is provided with a rubber pad for sealing and waterproofing.
The internal structure of the earbud front cavity, all components are fixed by green plastic brackets.
The circuit also uses a combination of soft and hard boards, which can maximize the use of internal space. The positive and negative electrodes of the battery are welded on the small plate, reinforced with glue, and play an insulating role at the same time.
Flip open the connector and remove the motherboard unit.
Circuits on the motherboard side.
Circuits on the other side of the motherboard.
On the right is the metal dome used to connect the bluetooth antenna. The earbud main control chip on the left adopts BES BES2700YP, which is the latest generation of BES ultra-low power consumption and highly integrated bluetooth audio SoC. It adopts 12nm process technology, integrates dual-mode Bluetooth 5.3, supports BT&BLE, and has a built-in Arm Cortex-M55 CPU and Tensilica HiFi 4 DSP in the main processor, which greatly improves the computing performance of the chip. The sensor hub subsystem has a built-in STAR-MC1 MCU and BES self-developed neural network processor BECO NPU, which realizes rich application processing capabilities while significantly reducing power consumption.
According to 52audio, currently Huawei, OPPO, Xiaomi, Samsung, vivo, Honor, JBL, 1MORE, Baidu, OnePlus and many other brands of true wireless earphones are widely used.
The metal dome used to connect the negative terminal of the battery.
ST LSM6DSV16BX 6-axis IMU, bone conduction two-in-one chip. The 6-axis IMU is used for the 360 audio function, and the bone conduction is used for the noise cancellation of the uplink call. At the same time, the software can support head tracking and VAD algorithm.
Samsung self-developed MUB02 power IC. Integrated Fuel Gauge, DC/DC Converter, Linear Charger, Low Dropout/LDO Regulator, and Reset IC.
Silkscreen 396 G4Z IC.
The hall element of the silk screen KZ 1oB, when it is detected that the earbuds enter the charging box, it will automatically shut down and charge.
Remove the bracket, the internal structure of the cavity.
The inside of the bracket is used to protect the battery.
After the battery is taken out, the lower bracket structure also plays a role of isolation from the sound cavity.
The earbud uses a steel shell button battery, model: NS1250, size: 12mm (diameter), 5.0mm (thickness), rated voltage: 3.85V, rated capacity: 58mAh. From Samsung SDI Co., Ltd.
The side structure of the battery, the white plastic ring is used for positive and negative insulation.
Lift off the magnetic isolation sheet at the bottom and the spot welding sheet on the back of the battery.
The internal structure of the front cavity of the earbud, and the words “J2726BG2BN” are silk-screened on the bracket.
Take out the bracket, the inner structure of the cavity.
The back structure of the bracket is equipped with a shielding metal sheet to shield the battery from interfering with the sound unit.
The internal structure of the earbud front cavity, all components are connected on the same cable.
The metal contacts and cable solder joints for earbud charging are strengthened and fixed with glue.
The back of the optical in-ear detection sensor board.
Remove the cable and the speaker from the cavity, and the cable is provided with a feed-forward noise cancellation microphone and a call pickup microphone.
Two MEMS microphones laser-engraved model “G256 2A08”, used for ANC, call noise cancellation and ambient sound mode pickup.
Screen printing C2284M integrated lithium battery protection IC.
The headphone speaker uses a dynamic driver, and the front diaphragm is provided with a metal cover.
On the back of the dynamic driver, tuning holes are set around to improve the acoustic performance, and it is protected by a dust filter.
The tuning hole on the side of the dynamic driver.
After actual measurement, the size of the dynamic driver is about 10mm.
Infrared in-ear detection sensor, used to automatically pause playback when earbuds are removed, and automatically resume playback when earbuds are worn.
The tuning hole of the sound cavity is protected by a fine dust-proof net inside.The magnet used to absorb the charging case is fixed with glue.
The feedback noise cancellation microphone inside the sound chamber is used to pick up noise from inside the ear canal.
All components of Samsung Galaxy Buds2 Pro true wireless noise cancellation earbuds.
Samsung Galaxy Buds2 Pro continues the family-style design in terms of appearance, with good texture and strong recognition. The rounded rectangular charging case design is compact and portable, and the matte texture is delicate to the touch, which is not easy to be stained with fingerprints. The redesigned bean-shaped in-ear earbuds are mini and round in size, light and stylish to wear. It also supports IPX7 waterproof performance, and it can still play continuously in rainy days, and it also reduces the risk of damage caused by accidental washing.
In terms of internal structure configuration, it is similar to the previous two generations of products, but it also maintains the first-class design and workmanship standards. The wiring design combined with soft and hard packages makes good use of the internal space. The components are connected by connectors, making the overall structure complex and orderly. The charging case has a built-in ATL 500mAh lithium battery, which supports wired charging and wireless charging to input power. Equipped with Samsung’s self-developed power management chip, the single chip is responsible for battery charge and discharge management and other functions.
In terms of internal configuration, the earbud is equipped with a 10mm dynamic driver and 3 MEMS microphones for ANC mode, call noise cancellation and ambient mode pickup. Built-in Samsung SDI 58mAh steel shell button battery, power management is in charge of by Samsung self-developed MUB02 chip. The main control chip of earbuds adopts BES BES2700YP bluetooth audio SoC, supports dual-mode Bluetooth 5.3, and has the characteristics of ultra-low power consumption and high integration. It also uses ST LSM6DSV16BX 6-axis IMU and bone conduction two-in-one chip for 360 audio, call noise cancellation and other functions.