High-end audio brand HIFIMAN has created many popular models for music enthusiasts, from HiFi portable music players to high-end planar diaphragm headphones, HiFi wired headphones, and true wireless earphones. Among them, based on the Svanar TWS earbuds, the HIFIMAN Svanar Wireless, HIFIMAN Svanar Wireless LE and HIFIMAN Svanar Wireless Jr have been released successively to provide users with high-fidelity wireless sound quality experience.
HIFIMAN Svanar Wireless Jr is an entry-level HiFi TWS product positioned as light luxury. The appearance continues the design style of the Svanar series. It inherits the core characteristics of “Class A and B balanced amps” and “topological diaphragm”. Supports Bluetooth 5.2 and LDAC high-definition audio decoding.
HIFIMAN Svanar Wireless Jr supports ANC noise cancellation function, which can accurately identify noise and offset the noise through reverse signals, bringing a noise cancellation effect of up to 35dB depth. Supports ENC call noise cancellation, which can still maintain clear and efficient calls in noisy environments. The battery life is about 6 hours in HiFi mode, about 7 hours in ANC mode, and about 8 hours in transparency mode. The total battery life is up to about 32 hours. Let’s take a look at the detailed teardown report of HIFIMAN Svanar Wireless Jr.
01/ HIFIMAN Svanar Wireless Jr Charging Case Teardown
Remove the bottom shell of the charging case.
Remove the screws and take out the charging bin structure.
The structure on the back of the charging bin secures the charging case motherboard.
There is a frame structure at the bottom of the charging bin, and the battery is fixed inside.
Remove the screws, remove the frame, and take out the motherboard and battery.
The bottom structure of the charging bin has an FPC fixed on it, and the connector and Hall element for earbuds charging are set above.
Remove the screws and the cable. The circuit on the FPC side.
The circuit on the other side of the FPC.
The Pogo pin connector for charging earbuds is set inside the magnet.
The hall element with silk screen printing “8891M” is used to sense the magnetic field changes when the charging case lid is opened/closed, and then notify the charging case MCU and earbuds to pair or disconnect with the connected device.
The circuit on the side of the charging case motherboard.
The circuit on the other side of the charging case motherboard.
The LED indicator light that provides the light source for the LOGO on the back of the charging case has a light hood on the periphery.
Function button for bluetooth pairing.
Silk screen 54S IC.
Connect the connector to the FPC.
LED lamp beads that provide light source for the indicator light inside the charging bin.
Silk screen 1ACpy boost IC.
4.7μF power inductor.
SinhMicro SS881A POWER MCU is responsible for the charge and discharge management and charging case control of the built-in battery.
Prisemi P14C1S overvoltage and overcurrent protection IC has an input voltage of up to 32V and a fixed overvoltage protection point of 6V.
The charging case has a built-in lithium-ion battery, model: YXE 102040, nominal voltage: 3.7V, rated capacity: 800mAh/2.96Wh. The battery is equipped with a circuit protection board and is protected by high-temperature insulating tape.
Tear off the insulation protection, and the circuit on one side of the battery protection board is equipped with a lithium battery protection IC, MOS tube, and thermistor.
Silk screen DW01AP lithium battery protection IC is responsible for battery overcharge, overdischarge, and overcurrent protection.
Silk screen 8205A MOS tube to work with lithium battery protection.
02/ HIFIMAN Svanar Wireless Jr Earbuds Teardown
Remove the earbud stem back cover. There is an earbud motherboard on the inside of the cover. There is a small power amplifier board inside the cavity, which is connected to the motherboard through FPC and BTB connectors.
Remove the motherboard unit inside the cover.
The bottom structure of the cover plate, with a bracket printed on the LDS antenna and touch electrodes above. The bottom covers the pickup channel of the microphone.
The circuit on one side of the earbud motherboard.
The circuit on the other side of the earbud motherboard is connected to the FPC through the BTB connector.
The motherboard connects the speakers inside the front cavity and the BTB connector of the battery FPC.
Silk screen 3M A3 IC.
AIROHA AB1565AM bluetooth audio SoC. The AB1565x series is Airoha’s advanced bluetooth audio solution, supporting Bluetooth 5.3 and LE audio. The latest multi-point for TWS can connect laptops and mobile phones at the same time. Providing ultra-low power consumption and ultra-low latency performance, the average power consumption can reach ~4.x mA, which is the leading power consumption level in the current bluetooth audio market. AB1565x also has stable bluetooth connection, clear sound quality and Hybrid ANC function, which can provide rich and powerful performance for bluetooth headphones.
The crystal oscillator that provides the clock for the bluetooth chip.
The MEMS microphone of Lasdiao iA322 is used for voice call function pickup.
The MEMS microphone of Lasdiao iC291 is used for the noise cancellation function to pick up external environmental noise.
The motherboard is connected to the BTB connector of the FPC on the power amplifier board.
Pogo Pin connector to connect the touch electrode.
Silk screen 7133B touch detection IC.
Connect the FPC circuit between the main board and the power amplifier board.
The BTB connector that connects the FPC to the motherboard.
The BTB connector that connects the FPC to the power amplifier board.
Disassemble the earbud head, and the FPC inside the front cavity connects the speaker, battery, in-ear detection sensor and microphone.
The front of the earbud speaker is protected by a metal cover.
Remove the cover. According to the official introduction, the speaker uses Topology diaphragm, which is a diaphragm with a special coating on the surface. The coating is distributed in a special geometric configuration. According to different timbre requirements, the formula, thickness and geometric shape of the coating are adjusted to achieve the purpose of adjusting the sound.
On the back of the speaker, solder the wires.
After actual measurement, the speaker diameter is about 10mm.
The earbud has a built-in 1454 soft-pack button battery, model: MH62875, nominal voltage: 3.7V, energy: 0.3145Wh, from HJ.
Infrared distance sensor is used to detect the wearing status, automatically pause playback when taking off the earbuds, and automatically resume playback after wearing them.
The MEMS microphone of Lasdiao iC241 is used to pick up noise from inside the ear canal.
The FPC connects to the motherboard’s BTB connector.
The internal structure of the rear cavity holds the small power amplifier board.
The circuit on one side of the power amplifier board.
The circuit on the other side of the amplifier board. The middle one is the BTB connector that connects to the motherboard FPC.
Audio power amplifier, the details could not be obtained.
The WillSemi WSP6580Q audio switch, powered by SwitchPro technology, is a dual SPDT analog switch – featuring ultra-low distortion, high off-isolation, and is suitable for specialized stereo audio applications. Features negative swing audio signal capability with ultra-low Ron of 0.2Ω (typ) at 3.3V VCC. With excellent THD+N performance and other high performance, WSP6580Q is an ideal device for high-fidelity system applications.
All components of HIFIMAN Svanar Wireless Jr true wireless noise cancellation earphones.
03/Summay
The design of HIFIMAN Svanar Wireless Jr is very unique. The charging case adopts a polyhedral design with a leather-like texture, giving it an excellent texture. The earbuds adopt a short-earbud stem in-ear design – larger in size than mainstream TWS earbuds, but with a comfortable and stable wearing experience.
The charging case has a built-in 800mAh lithium battery and uses SinhMicro SS881A POWER MCU and Prisemi P14C1S overvoltage and overcurrent protection IC. The earbud is equipped with an HJ 0.3145Wh soft-pack button battery, a 10mm topology diaphragm dynamic driver and three MEMS microphones for voice calls and noise cancellation function pickup.
The earbud motherboard uses AIROHA AB1565AM bluetooth audio SoC, which supports Bluetooth 5.3, dual device connection, and Hybrid ANC, providing rich and powerful performance for earbuds. The power amplifier board is equipped with an audio power amplifier and WillSemi WSP6580Q audio switch.
PS: Translated from 52audio
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