Baseus is a consumer electronics brand, and its products cover many fields such as charging, audio, car products, smart home, and smart home appliances. Recently, Baseus's Bowie series TWS earphones have been updated with a new product - M2s Pro, compared with the previous generation of Bowie M2s, in terms of appearance color matching, Bluetooth transmission delay, sound quality, active noise cancellation, call noise reduction ability, and battery life have been comprehensively upgraded.
Baseus Bowie M2s Pro True Wireless Noise Cancelling Earphones are upgraded to Bluetooth 5.4 to further enhance connection stability, reduce sound quality loss and latency, support LHDC high-definition audio decoding, obtain Hi-Res Gold Standard certification, and pass 96k/24bit sampling rate, bringing richer audio details; It also supports BISA spatial sound, with two modes: music and theater, and presents an immersive audio experience through stereo enhancement technology.
Baseus M2s Pro has further improved noise reduction capabilities, with active noise reduction providing a maximum noise reduction depth of -52dB, 5000Hz noise reduction bandwidth, and also supports commuting, indoor, and outdoor modes and custom 1-10 levels of noise reduction depth adjustment to meet the needs of noise reduction in multiple scenarios; Call noise reduction is newly upgraded with an AI anti-wind noise algorithm, which automatically detects and intelligently cancels out to ensure clear call results in windy weather. The battery life has also been further improved, and the comprehensive battery life has reached 35 hours while maintaining a single 7-hour long-lasting battery life. Let's take a look at the detailed teardown report of this product~
一、Baseus倍思BowieM2s Pro真无线降噪耳机开箱
The Baseus M2s Pro True Wireless Noise Cancelling Headphones packaging box continues the family-style design, with a magnetic folding box cover, showing the overall appearance of the product, brand LOGO and product name, -52dB ultra-deep noise reduction, four-microphone call noise reduction, 0.06s low latency, Bluetooth 5.4 functional features, as well as LHDC, Hi-Res AUDIO WIRELESS logo.
On the back of the box, some of the product's product parameters and company information, packaging list, and APP download QR code are introduced. Model: Baseus PM87-A, Bluetooth version: V5.4, communication distance: 10 meters, listening time: about 7 hours (ANC off, spatial sound default state, 50% battery), listening time with charging case: about 35 hours, battery capacity: 35mAh/0.135Wh (earphone), 400mAh/1.48Wh (charging case), earphone rated input: DC5V-70mA, charging case rated input: DC5V-700mA, Earphone rated current consumption: 6mA, charging case rated current consumption: 220mA, charging time: about 1 hour, frequency response range: 20Hz-20kHz, charging interface: Type-C, manufacturer: Shenzhen Baseus Technology Co., Ltd.
The graphic on the left side of the box introduces the three intelligent audio technologies of Baseus Acoustics: Baseus Spatial Sound, Baseus Smart Shuanglian, and Baseus Instantaneous Flash Charge.
The right side of the box is affixed with an anti-counterfeiting label, and it is designed with a schematic diagram of active noise reduction.
The contents of the box include the charging case, earphones, earbuds, charging cable, Baseus sticker, product manual and warranty card.
Two pairs of silicone ear tips are included as standard, and one pair is pre-installed on the earphones, with a total of three sizes: large/medium/small, and comes with a dust filter to block large foreign particles.
随机标配的充电线，采用了USB-A to Type-C接口，端口雕刻“Baseus”品牌LOGO。
The Baseus Bowie M2s Pro charging case continues the square design of the previous generation, but adopts a new color and diaphragm process, which has a warm texture and a pearlescent-like luster.
The front appearance of the charging case is at a glance, with the "Baseus" brand logo designed on the lid of the case, and the silver metal strip on the body is decorated, which is also an indicator light.
The back of the charging case has a glimpse of the exterior with a shiny silver hinge with the BISA logo and product model number printed on it.
The bottom of the charging case is equipped with a Type-C charging port and a Bluetooth pairing function button.
Open the lid of the charging case, and the internal cockpit adopts an open design, which is magnetically fixed and can be easily accessed and placed.
Take out the headphones and get a look at the interior of the cockpit.
Product parameter information is printed on the inside of the lid, which is consistent with the outer box.
A metal shrapnel connector at the bottom of the cockpit to charge the headphones.
Close-up of the light illumination status with an ice blue color.
Baseus Bowie M2s Pro True Wireless Noise Cancelling Headphones have an overall appearance at a glance, and the earphones have a stem-shaped in-ear design, which has an excellent texture.
The exterior of the earbuds has a new design on the back cover of the earbuds, with a new silver bezel and brand logo decoration, which further enhances the texture and recognition of the product.
Close-up of the pressure relief hole on the side of the earphone stem, protected by a metal cover.
Close-up of the microphone pickup hole at the bottom of the stem.
The appearance of the inside of the earphone is at a glance, and the earphone head adopts a smooth glossy texture, which is comfortable to wear and skin-friendly; The inside of the earphone stem is designed with L/R left and right logos, which is easy for users to distinguish.
Close-up of the pressure relief hole on the inside of the headphone head is used to ensure air circulation inside the sound cavity and balance the pressure difference between the inside and outside.
The metal contacts at the bottom of the stem for charging the earphones.
Remove the earbuds, close-up of the earphone mouthpiece, dust filter protection. There is a noise-canceling microphone inside, which is used for active noise cancellation, call noise cancellation and other functions to pick up voices.
A close-up of the tuning hole at the bottom of the outlet tube to ensure air circulation inside the sound chamber.
经我爱音频网实测,Baseus倍思Bowie M2s Pro真无线降噪耳机整体重量约为51.8g。
Weighing only 4.6g per earbud, the earbuds are lightweight and comfortable to wear.
我爱音频网采用CHARGERLAB POWER-Z KM002C对Baseus倍思Bowie M2s Pro真无线降噪耳机进行有线充电测试,充电功率约为1.52W。
二、Baseus倍思BowieM2s Pro真无线降噪耳机拆解
Through unboxing, we learned in detail about the stylish design of Baseus Bowie M2s Pro true wireless noise cancelling earphones, and now enter the disassembly part to see the internal structure design and configuration information~
Disassemble the charging case
Disassemble the charging case shell and take out the internal cockpit structure.
An overview of the inner structure of the charging case.
An overview of the cockpit side structure, which holds the battery cells in place and is protected by sponge pads.
An overview of the structure of the cockpit floor, with the main board unit fixed by screws.
Remove the screws and remove the motherboard and battery from the cockpit.
The bottom structure of the cockpit is fixed with two sets of 6 magnets to secure the earbuds and the charging case cover.
A list of circuits on one side of the motherboard of the charging case.
A list of circuits on the other side of the motherboard of the charging case.
Injoinic IP5528 TWS earphone charging bin management SoC is a multi-functional power management SOC that integrates MCU, boost converter, lithium battery charging management, and battery level indication, providing a complete solution for TWS charging case. Thanks to the high integration and rich functions of IP5528, only a few peripheral components are required for application, which effectively reduces the size of the overall solution and reduces the BOM cost.
IP5528 supports follow-up charging function, which can realize 10mV fine step adjustment of charging voltage in the range of 3.2~5.5V, which can effectively improve the conversion efficiency of 15%~20% of the charging case battery to the earphone battery, and then improve the comprehensive battery life of TWS earphones by 15%~20%. Based on this feature, brand manufacturers can make more flexible trade-offs in battery capacity, appearance volume and functionality.
For example, without increasing the battery capacity, the product can be made to provide a longer battery life; Or use a smaller capacity battery to achieve the same battery life as the original, which can not only effectively reduce costs, but also reduce the size of the product and improve portability; It can also be equipped with more functions and applications to ensure that the battery life of the product is not compromised, so that users do not need to worry about it.
In the application, IP5528 only needs one inductor to achieve buck-boost function, supporting low-cost inductors and capacitors. The IP5528's synchronous boost system provides a rated output current of 400mA and a conversion efficiency of up to 93%. At light load, it automatically enters the sleep state, and the quiescent current drops to 15μA.
The IP5528 uses switch-charging technology to provide a rated 1A charging current and a charging efficiency of up to 90%. Built-in chip temperature protection and input voltage intelligently adjust the charging current. The IP5528 has a built-in 12-bit ADC that accurately measures battery voltage and current. Support 1/2/3/4 LED power display and digital power display. According to the product manual, IP5528 also supports an output voltage of 3.2V~5.2V, which supports fast charging of earphones.
According to the dismantling of I love audio network, there are currently Honor, realme, Transsion, Edifier, Baseus, ZTE, JLab, QCY, Haibei, Netease Cloud Music, Kugou, Himalaya, Pioneer, Magic, Pinheng, Bull, Aoji, MPOW, BoAt, Nokia, Lenovo, Shanshui, Ambie, Nuobixing, Chongke, Loca, ROBOT, HYUNDAI, Btootos, Qiaowei, Movie Giant, Skullcandy, Hey, A large number of brands such as Shengkuo and other brands of TWS earphone charging cases adopt the power management scheme of Yingjixin.
The silk-screen 1R0 boost inductor is used to boost the built-in battery to charge the earphones with the power management chip.
Prisemi P14C5N over-voltage and over-current protection chip supports input over-voltage and under-voltage protection, and over-current protection after circuit start-up.
Close-up of the metal shrapnel connector of the charging case to charge the earbuds.
Type-C充电母座特写。
Close-up of LED indicator for Bluetooth pairing and charging status.
Close-up of the function button for Bluetooth pairing, patch soldering.
Close-up of the ZIF connector connecting the motherboard to the Hall element cable.
A list of Hall element wiring circuits.
The Hall element of the AR3q7 is used to sense the change in the magnetic field when the charging case is opened/closed, and then notify the charging case MCU and earbuds to pair or disconnect from the connected device.
Charging case built-in lithium-ion battery Model: WEL 602035, Nominal voltage: 3.7V, Rated capacity: 400mAh 1.48Wh, from Shenzhen Xuhangcheng Electronics Co., Ltd.
The back of the battery is silk-screened with the certification logo.
Tear off the insulation protection, a list of circuits on the side of the battery protection board, a lithium battery protection IC and MOS tube, and a thermistor to detect the temperature of the battery.
The other side of the battery protection plate is welded with the wire and the positive and negative nickel sheets of the battery.
Silk screen 8205A MOS tube.
The lithium battery protection IC of silk screen DW01AT is responsible for the protection of battery overcharge, over-discharge, over-current, etc.
Headset disassembly
Disassemble the earphone part and open the earphone head cavity along the clamping line.
An overview of the internal structure of the front cavity, which connects the speaker, in-ear detection sensor, and noise-canceling microphone via cables.
The internal structure of the rear chamber is at a glance, and a battery cell is provided for protection, which is wrapped and protected by high-temperature insulating tape.
Remove the cover on the back of the earphone stem and remove the motherboard and battery cell.
The inner structure of the cover plate of the earphone stem is at a glance, and the Bluetooth antenna and touch detection sensor are installed in the mezzanine, and the copper is exposed to connect to the motherboard.
An overview of the internal structure of the earphone stem cavity, with the magnet covered by a magnet shielding sticker.
Close-up of the metal connector connecting the motherboard on the inside of the charging contact.
The structure at the bottom of the rear chamber is at a glance, and an isolation layer is set for separation. A magnet is fixed on the wall of the cavity and adsorbed and fixed with the charging case.
耳机内置的钢壳扣式电池，型号：M1040S2，标称电压：3.85V，容量：35mAh 0.135Wh，来自MIC-POWER微电新能源。
The negative electrode of the battery is engraved with a QR code for product traceability.
A list of circuits on the side of the headset motherboard.
A glance at the circuit on the other side of the headphone motherboard.
Close-up of the metal shrapnel connecting the charging contacts, with a microphone pickup hole in the middle, protected by a wire mesh.
Bluetrum BT8932H Bluetooth audio SoC with built-in 32-bit high-performance RISC-V processor core, supporting DSP instructions, and running at a maximum frequency of 140MHz; Built-in 16Mbits flash memory, 320KB RAM; Flexible GPIO pins with programmable pull-up and pull-down resistors; GPIO wake-up or interrupt is supported.
BT8932H conforms to Bluetooth 5.4+BR+EDR+BLE specifications, the maximum transmit output power is +10.5dBm, the acceptance sensitivity is -94.5dBm@2M EDR, it supports TWS communication power consumption with balanced efficiency, and it supports TWS master-slave switches.
BT8932H has a high-performance stereo DAC with a signal-to-noise ratio of 104dB and supports differential mode and VCMBUF mode; It has a three-channel high-performance ADC with a signal-to-noise ratio of 102dB; It supports three MIC amplifier inputs, supports flexible audio equalizer adjustment, and supports 8, 11.025, 12, 16, 22.05, 32, 44.1, 48, 88.2, 96, 176.4 and 192KHz sample rates. It also supports feedforward, feedback, and hybrid active noise cancellation, neural network processing unit (NPU), low-power touch keys, in-ear detection, and integrated PMUs such as chargers/bucks/LDOs.
Bluetrum BT8932H detailed information map. According to the dismantling of I love audio network, there are currently Redmi, Lenovo, Edifier, Baseus, Bull, Huiwei, FIIL, Skyworth, Kugou, Chongke, Nuobixing, Feisheng, Miniso, Uncle Kai tells stories, landscape, magic sound, Wal-Mart, QQ Music, iFLYTEK, Himalaya, Netease Cloud Music, bilibili, Sing Bar, Meizu, NOME, Transsion, LeTV, Xia Xin, Philips, Green Union, 360, Audio-Technica, Vantini, Tmall Genie, Defunc, Coocaa and other brands use the solution of Zhongke Lanxun for their products.
The Bluetooth chip has a precision wire-wound inductor around the periphery to power its internal circuitry.
Close-up of a metal amine sheet connected to a Bluetooth antenna and a touch detection sensor.
The six-axis sensor of the Silk Screen 135 B44I is used to collect head movement data for the spatial sound function.
The BTB connector socket connecting the internal component cable of the earphone head is from Acechi Technology (OCN), model: OK-118RF010/2-35.
The all-in-one lithium battery protection IC of silk-screen 3w AGM is responsible for the charge and discharge protection of the battery.
Close-up of the 24.0MHz crystal oscillator used to provide the clock.
The MEMS silicon microphone of the R3BT is a call/feedforward microphone for noise cancellation and call pickup, which comes from Ruiqin Electronics.
Take out the cables and connected components inside the front cavity.
The bottom structure of the front cavity is at a glance, and the openings are protected by wire mesh.
A list of circuits on one side of the speaker cable.
A list of circuits on the other side of the speaker cable.
Close-up of the headphone speaker, using a highly dynamic diaphragm speaker, with the characteristics of high sensitivity and low distortion, can better restore the sound.
There are four mixing holes on the back of the speaker, which are protected by a wire screen.
Speaker vs. one-dollar coin size.
According to the measurement of I love audio network, the diameter of the speaker is about 10mm.
Close-up of the capacitive in-ear detection sensor, which is used to automatically pause music playback when the earphones are taken off and automatically resume playback when the earphones are worn.
The R3BW is a feed-back microphone that picks up ambient noise for noise cancellation.
Close-up of the BTB connector male socket connected between the speaker cable and the motherboard, from Arcchi Technology (OCN), model: OK-118RM010/2-35.
Baseus倍思Bowie M2s Pro真无线降噪耳机拆解全家福。
3. I love the audio network summary
In terms of the appearance design of Baseus Bowie M2s Pro true wireless noise cancelling earphones, on the basis of the previous generation, a new color and film process is adopted, which brings better texture performance. The rounded square charging case is light in size, warm in texture, and pearlescent-like luster; The stem-shaped earbuds are designed with the same craftsmanship as the charging case, with a new silver bezel and brand logo decoration, making them look stylish and more recognizable.
In terms of internal main configuration, the charging case and earbuds are equipped with the same battery specifications as the previous generation, the charging case has a built-in Xu Hangcheng 400mAh lithium battery, the earbuds have a built-in 35mAh steel shell button battery, the power management adopts Injoinic Yingjixin IP5528 SoC, integrated MCU, boost converter, lithium battery charging management, battery level indication, support follow charging function, can effectively improve the conversion efficiency of 15%~20% charging case battery to earphone battery, As a result, the comprehensive battery life has been increased from 30 hours to 35 hours.
The earbuds are equipped with a 10mm high-dynamic diaphragm speaker, two MEMS microphones from Ruiqin Electronics are built into one ear, and the main control chip is Bluetrum BT8932H Bluetooth audio SoC, which supports Bluetooth 5.4, supports active noise cancellation, AI call noise reduction, touch and in-ear detection, and integrates PMU; A six-axis sensor is also used for spatial sound to capture head movement data.