----- I Love Audio Network Dismantling Report Part 746-----
Beth Bowie E9 true wireless headset is a product of the main call noise reduction function of Bess, filtering environmental noise through double-wheat directivity beamforming technology, and dynamically tracking human voice with AI neural network algorithm to achieve "no fear of wind sound, clear words" voice call effect; at the same time, it also has a wealth of other functional applications, including cross-platform dual device connection, open cover connection, ear detection, instantaneous flash charging, wireless charging, etc.
In terms of configuration, Bowie E9 is equipped with a 10mmPU + titanium composite diaphragm dynamic unit, a new generation of 5.3 Bluetooth version, providing strong low-frequency sound and stable wireless connectivity; the use of dual-channel low-latency technology, support for game and video sound adaptive enhancement, to achieve an immersive game viewing experience of sound and picture synchronization; endurance, headphones with a single battery life of 5 hours, with a charging box with 30 hours of comprehensive battery life.
First, Beth Bowie E9 true wireless headphones out of the box
Beth Bowie E9 True Wireless Headphone Box has a simple design, with the "Baseus" brand LOGO displayed on the front, the appearance rendering of the headphones and the product name.
The back of the box introduces the parameter information of the product, name: Beth TWS true wireless Bluetooth headset, model: Baseus Bowie E9, battery capacity: 40mAh/0.148Wh (headphones), 400mAh/1.48Wh (charging box), headphone rated input: DC5V-80mA, charging box rated input: DC5V-800mA, frequency response range: 20Hz-20kHz, charging interface: Type-C.
Inside the box are headphones, earbuds, charging cables, and a document box.
The white charging cable adopts USB-A to Type-C interface.
Three pairs of silicone earbuds of different sizes, the headphones are also pre-installed with one pair to meet the individual needs of different users.
The Beth Bowie E9 True Wireless Headphone Charging Case features a rounded square design with a bar indicator on the front open cover and a "Baseus" brand LOGO printed on the bottom.
A metal hinge is used on the back of the charging case.
The bottom of the charging case sets the Type-C charging interface and the Bluetooth pairing function button.
Open the charging case cover, and the headset placement status is displayed, protruding in the cockpit for quick access.
Charging box lid is printed with product parameter information on the inside silk screen, headphones: 40mAh/0.148Wh, input: 5V-80mA; charging box: 400mAh/1.48Wh, input: 5V-800mA.
On the other side are PRINTED CE, FCC certification, and recyclable markings.
Remove the headphones from the charging case.
The metal connector for charging the headphones is located at the bottom of the headphone handle cockpit.
The cockpit is engraved with L/R left and right logos.
The overall appearance of the Beth Bowie E9 true wireless headphones at a glance.
The overall appearance of the Beth Bowie E9 headphones at a glance, for the handle-like in-ear design, the headphones into the ear structure is more unique, through multi-point fine arrangement processing, to achieve seamless fit between the curvature of the headphones and the ear canal, improve the comfort and stability of wearing.
The earring handle has a rectangular design, and the bottom is further enhanced by a silver tail plug.
The indicator light on the headphone handle is close-up to feedback the working status of the headset, and it is also a touch area for the control of various functions of the headset.
There is a noise-cancelling microphone pickup opening on the top of the ear handle, and the metal mesh cover is set up to protect it from foreign objects entering the cavity.
There is a call microphone pickup opening on the tail plug of the earphone handle, which is also protected by a metal mesh cover.
The bottom tail plug of the earphone handle is flanked by metal connectors that charge the headphones.
At a glance at the inside of the headset, the earbud design is more unique, and it is presented in the same curve as the fuselage.
The inside of the tail plug of the earphone handle is designed with L/R left and right logos for easy user quick differentiation.
Close-up of the pressure relief hole of the headset ensures air circulation in the cavity, reduces the pressure difference between inside and outside, and improves wearing comfort.
Remove the earbuds, close-up of the oval headphone nozzle, and fine dust mesh protection to prevent foreign objects from entering the sound cavity.
A tuning hole is provided on the sound tube to improve air circulation in the cavity.
According to the actual measurement of my love audio network, the overall weight of the Beth Bowie E9 true wireless headphones is about 45.6g.
The single earbud weighs only 4.0g, which is very light and improves the comfort of wearing.
I love audio network using TRAFFICLAB POWER-Z KM002C to conduct wired charging tests on Beth Bowie E9 true wireless headphones, and the charging power is about 3.53W.
I love audio network using TRAFFICLAB POWER-Z KM002C to carry out wired charging tests on Beth Bowie E9 true wireless headphones, and the charging power is about 1.88W.
Second, Beth Bowie E9 true wireless headphones disassembly
Well, by unboxing we understand the exterior design of this product, let's go to the disassembly section to see the internal structure design and configuration information.
The charging case is disassembled
Pry open the charging case and remove the internal cockpit structure.
Close-up of the function button structure on the inside of the charging case.
Charging box cockpit structure at a glance, the battery is located in the middle position, the upper and lower are protected by sponge pads, which plays a good protective role.
The bottom of the cockpit is provided with a wireless charging receiver coil, which is fixed to the plastic bracket at the bottom.
Remove the wireless charging receiver coil and secure the lower plastic bracket with the cockpit structure by screws.
Remove the bracket and the motherboard is held in place with the cockpit by screws.
The charging case LED strip is wired to the motherboard via a ZIF connector.
Remove the motherboard, the bottom structure of the cockpit is at a glance, and the indicator light guide column is wrapped in black tape to prevent light leakage.
Remove the indicator plate circuit, the bottom structure of the cockpit is at a glance, and there are four magnets for adsorbing the charging case cover and headphones.
List of charging case indicator cable circuits.
The screen-printed HALL element of the AR0d1 senses changes in the magnetic field when the charging case is turned on/off, thereby notifying the charging case MCU and headphones to pair or disconnect from the connected device.
10 LED indicators close-up for feedback charging case charge information.
A list of motherboard circuits in the charging case, the wireless charging receiver coil and battery are connected to the motherboard by wire soldering.
Close-up of the wireless charging receiver coil, set on a magnetically isolated shield sticker.
Charging box internal lithium battery model YJ85173OK-2C, rated voltage: 3.7V, rated capacity: 400mAh/ 1.48Wh.
The battery is equipped with a circuit protection board, a DW01 lithium battery protection IC and an 8205A MOS tube, and a thermistor to detect the battery temperature.
List of front circuits on the motherboard of the charging case.
List of circuits on the back of the charging case motherboard.
The type-C charging connector mother on the motherboard is close-up, and the vias are welded and fixed.
Bluetooth pairing function button close-up.
The charging case uses a NuVolta NU1680C wireless charging receiver chip inside, which is a highly integrated wireless power receiver. An integrated synchronous rectifier eliminates the need for bootstrap capacitors, is characterized by high efficiency and low cost, and the output voltage can be adjusted to track the battery voltage, further reducing the power consumption of the charging system.
The NU1680C can communicate with the transmitter system via ASK in accordance with WPC V1.2.4. FOD parameters can be configured with external resistors to pass foD testing. The NU1680C also supports standard protection features such as overcurrent protection, short-circuit protection, overvoltage protection, and thermal shutdown.
SY8801 TWS headphone charging compartment SOC, designed for TWS headphone charging compartment, is designed for TWS headphone charging compartment, based on the design to ensure safety and high reliability performance (support 28V input withstand voltage, built-in full-featured charge and discharge overvoltage, overcurrent, overtemperature, short circuit protection and other functions), but also integrated I2C communication function and internal communication isolation function. Through the I2C interface, the MCU of the system can read and configure the internal functions of the power supply and the parameters of battery charge and discharge management, and easily realize functions such as NTC protection, segmented regulation of battery current, TWS headphone inbound, outbound detection, and automatic power output opening.
The integrated internal communication isolation module of Siyuan SY8801 greatly optimizes the functional design of the intelligent TWS charging chamber, without the need for complex peripheral circuitry, and the MCU can be achieved by connecting and controlling the SY8801. Not only can it realize the function of charging the headset, but also can transmit data through the power SUPPLY PIN connected to the headset, including the upload of the charging compartment, the clear pairing of the headset in the charging compartment, the factory reset, the headset software upgrade and other functions.
SY8801 detailed information chart of Svenelectron Semiconductor.
A 3R3 inductor that boosts the headphones with a power management chip.
Metal shrapnel on the motherboard to charge the headset.
A standard-free MCU microcontroller for charging case light efficiency control.
Headset disassembly
Go to the headset disassembly section and pry open the headset along the headset head clamping line.
The internal component cable vias of the headset head are connected to the motherboard inside the headset shank.
Close-up of the magnet for fixing with the charging case.
Cushion protection is provided at the junction of the cable and the headphone housing.
At a glance of the circuit under the sponge pad, the positive and negative electrodes of the battery are welded to the line, and an integrated battery protection chip is also welded.
Remove the battery cell and set the plastic piece underneath to hold the battery in place.
Remove the plastic part and you can see that the speaker unit is connected to the cable by wire.
Remove the speaker and give a glimpse of the internal structure of the cavity.
The Beth Bowie E9 True Wireless headphone speaker is close-up on the front and has a sealant ring on the edge.
Speakers are compared to the size of a dollar coin.
According to the actual measurement of I Love Audio Network, the size of the speaker unit is about 10mm, which is consistent with the official promotion.
A list of circuits on the battery FPC board.
Integrated lithium battery protection IC for silk screen printing 0wA3.
The inside of the headset adopts a steel shell buckle battery, model: LIR1040, capacity: 40mAh, also from YANJOO Yanjiu Electronics.
Pry open the cover on the back of the earphone handle and connect the cables of the components inside the headphone head to the motherboard via a BTB connector.
The inside of the headset handle cover is provided with a touch detection patch and a Bluetooth antenna, and the microphone opening is provided with a rubber cover to improve the radio performance.
A list of components in the headset head, including speakers, batteries, and in-ear detection patches.
Close-up of the BTB connector male for connection to the motherboard.
A glance at the internal structure of the earphone shank cavity.
Pry open the tail plug on the bottom of the earphone handle and solder the metal connector for charging the headphones to the motherboard. The tail plug is also provided with a microphone seal structure to improve acoustic performance.
A list of circuits on the side of the motherboard.
A list of circuits on the other side of the motherboard.
Close-up of the MEMS microphone of the Laser Sculpture R141 A51D, from Ruiqin Electronics, for voice call pickup.
A close-up of the headphone call noise-canceling microphone is also a radium sculpture of Ruiqin Electronics R141 A51D MEMS microphone. Dual microphones are coordinated with AI call noise reduction algorithms to achieve high-definition call effects.
Actions Torch Technology ATS3019 Bluetooth Audio SoC, the core adopts RISC32 simplified instruction set structure, the main frequency is 200Mhz, built-in ROM, 8Mbits SPI Flash and 216K bytes RAM, integrated power management, support lithium battery and DC5V power supply.
Juxin Technology ATS3019 supports Bluetooth 5.3 dual mode, transmission power up to 10dBm, reception sensitivity of -95dBm, effectively improve the stability of audio connection, while supporting low latency mode, Bluetooth audio signal delay as low as 40ms, support dual microphone ENC call noise reduction, etc.
Two precision winding power inductors on the periphery of the main control chip are close-ups, and they work with the internal buck circuit of THES3019.
A close-up of the crystal oscillator that provides the clock for the Bluetooth chip.
Close-up of the BTB connector mother for connecting components inside the headset head.
Close-up of metal shrapnel for connecting a Bluetooth antenna.
SILK SCREEN BE IC.
Tianyi's HX9023 touch detection IC integrates capacitive sensing AFE for specific absorption rate (SAR) applications. Supports 1.8V power input and output data via I2C bus. The HX9023 supports up to three sensor inputs with offset compensation capacitances up to 400pF. The HX9023 has a high sensitivity and is capable of detecting human approach. Suitable for headphones and smart wearable products.
Tianyi Hexin HX9023 detailed information chart.
A close-up LED indicator on the headset motherboard is used to feedback the Bluetooth pairing status.
Beth Bowie E9 True Wireless Headphones Disassemble Family Portrait.
I love audio network summaries
Beth Bowie E9 true wireless headphones in the appearance of the charging box using rounded square design, small and light, gradient strip indicator, it adds a lot of color; the handle-shaped in-ear headphones appearance curve is unique, and the fuselage presents the same curve of the earbud design, to achieve the seamless fit between the headphone curve and the ear canal, showing a comfortable wearing effect; the overall texture of the headphones is also excellent, and has a high degree of recognition.
In terms of internal circuits, the charging box has a built-in 400mAh lithium battery of Yanjiu Electronics, which supports wired and wireless input power. Wired charging using Type-C interface, Siyuan Semiconductor SY8801 charging chamber SOC, support 28V input withstand voltage, built-in full-featured charge and discharge protection, but also integrated I2C communication function and internal communication isolation function; wireless charging using Vodak NU1680C wireless charging receiver chip, integrated synchronous rectifier, no need for self-lifting capacitors, and can adjust the output voltage to track the battery voltage, further reduce the power consumption of the charging system; also adopt a non-standard MCU, Carry out the light effect control of the whole machine and the charging box.
Inside the headset, the headset head has a built-in 10mm dynamic unit, a 40mAh steel shell buckle battery and a capacitive in-ear detection patch, which are connected to the same cable and then connected to the motherboard through BTB. The motherboard is equipped with two Ruiqin Electronic MEMS microphones, using Juxin Technology ATS3019 Bluetooth audio SoC, the core adopts RISC32 simplified instruction set structure, built-in large-capacity storage space, supports Bluetooth 5.3 dual mode, low latency mode, supports dual microphones, and Tianyi Hexin HX9023 touch detection IC for touch operation functions.
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