1MORE FIT S50 adopt an ear-hook design, support IPX7 waterproof and sweat resistance, and can be washed directly with water to meet the needs of sports wear. In terms of functional configuration, 1MORE FIT S50 is equipped with a 1MORE acoustic engine. The speaker adopts an internal and external dual magnetic circuit design, with a diamond-like diaphragm, which has strong driving force and high resolution, and is professionally tuned by a Grammy award-winning master. Also, through the innovative directional sound transmission ring design, it can reduce sound leakage while ensuring comfort, so as to make listening clearer.
1MORE FIT S50 support Bluetooth 5.3, with lower power consumption and stronger anti-interference. Support intelligent call noise reduction function – Accurate sound pickup through the built-in dual-mic array of the headphone, and AI ENC algorithm to intelligently filter out noisy sounds to ensure high-definition call sound quality. The headphones have a single battery life of up to 11 hours and a comprehensive battery life of up to 38 hours. It supports Qi wireless charging and fast charging, and the headphones can be charged for 5 minutes and listen to music for 2 hours.
We have previously teardown the 1MORE products including: 1MORE ComfoBuds Pro, 1MORE ComfoBuds, 1MORE ColorBuds, 1MORE Stylish, etc.
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$119 – 1MORE Fit S50 Review
01/ 1MORE FIT S50 Charging Case Teardown
Disassemble the charging case and take out the internal charging cockpit. The cockpit is equipped with a wireless charging receiving coil.
Remove the wireless charging receiving coil and battery, and fix the lower motherboard with screws.
Remove the screws, and remove the motherboard and FPC. There are multiple magnets on the bottom of the cockpit to fix the headphones and charging case cover.
The information on the label of the built-in lithium battery in the charging case, rechargeable lithium-ion battery pack, product model: ZWD702332, nominal voltage: 3.7V, rated capacity: 500mAh/1.85Wh, charging limit voltage: 4.2V, from ZWD, made in China.
The circuit on one side of the battery protection board is equipped with a lithium battery protection IC, a MOS tube, and a thermistor for detecting the battery temperature.
Screen printing GBJE’s lithium battery protection IC is responsible for battery overcharge, overdischarge, overcurrent and other protection functions.
The silk screen 8205A MOS tube works with the lithium battery protection IC.
The circuit on the side of the motherboard of the charging case.
The circuit on the other side of the charging case motherboard.
The MCU MCU of silk screen CC2538 BP08899 is responsible for controlling the charging case.
Pogo Pin connector for charging headphones.
LY ICP1105 power management chip, integrated switch charging, withstand voltage 28V, maximum charging current 1A, cut-off voltage accuracy ±0.5%, CC/CV can be configured by I2C, and supports fast charging. Built-in synchronous BOOST boost output, output current 0.7A, efficiency up to 93%, and integrated power path management. Support dual-channel independent switch control, plug-in/unplug detection, and output light-load detection. In addition, the chip also integrates temperature protection, input overvoltage, faulty battery, charging timeout and so on.
The boost inductor of silk screen 3R3 is responsible for boosting the built-in battery to charge the headphones.
Bluetooth pairing function button.
LED indicator for feedback of bluetooth pairing and charging status.
The Hall element of the silk screen 4002 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 headphones with the connected device.
Screen printing IC of FIAF.
COPO CP2022 is a single-chip, advanced, flexible, secondary-side wireless charging transmission chip – can provide up to 3W power for portable applications, has the advantages of high integration, high efficiency, low power consumption, etc., compliant with Qi V1.3 standard.
Power input motherboard and FPC circuit.
02/ 1MORE FIT S50 Headphones Teardown
To disassemble the headphones, first remove the earhooks.
There are hidden set screws under the cover. Remove the screws and open the headphone cavity.
The internal structure of the front cavity, the left and right sides are respectively equipped with FPC main board and speaker.
Internal structure of the back cavity.
Take out the battery inside the cavity, and there is a bluetooth antenna and a touch detection sensor attached to the bottom of the cavity.
The headphone has a built-in soft pack button battery, product information on the label, model: HT1254, voltage: 3.7/4.2V, capacity: 60mAh/0.22Wh, from HT.
Take out all the components inside the front cavity.
The internal structure of the front cavity is equipped with a fixed magnet, a metal connector for charging the headphone and a wearing sensor hole.
The circuit on one side of the headphone motherboard.
The circuit on the other side of the headphone motherboard.
The metal piece that connects the bluetooth antenna and the touch detection sensor.
HYNITRON HK01BP low-power single-channel touch chip with built-in voltage regulator module/low voltage reset module. Support hardware de-jitter/environment adaptive algorithm, etc., with strong anti-interference performance. Multiple modes can be configured by pins.
The application circuit of HK01BP is simple, the sensitivity adjustment range is large, and the working current is extremely low, which is suitable for battery-powered application scenarios. It can be widely used in consumer electronics such as bluetooth headphones, electronic toys, household appliances and other products.
BTB connector for FPC, model: OK-128GF016/2-35, from OCN.
AIROHA AB1562E bluetooth audio SoC. The AB1562 is a Bluetooth 5.3 dual-mode certified single-chip solution – integrating hybrid active noise cancellation and delivering ultra-low power performance. Optimized for TWS and stereo headset use, the AB1562 provides excellent audio performance, clear voice and high-quality sound in most bluetooth audio headset applications.
AB1562 has a built-in Tensilica HiFi Mini processor for I/O peripheral control, protocol stack and DSP processing functions. AB1562 supports a new generation of echo cancellation and noise reduction solutions to improve the audio quality of voice calls for headset products. Supports Airoha MCSync technology, allowing the earbuds to switch seamlessly between the left and right earbuds for more balanced sound and low latency.
The crystal oscillator that provides the clock for the bluetooth chip.
The MEMS microphone of Laser Engraving ME50 D139 is used for voice pickup, from MEMSensing.
Another MEMS microphone of laser engraving ME50 D139. The two microphones work together to pick up the sound, and the call noise reduction algorithm intelligently filters out noises to provide clear calls.
The circuit on the FPC side is provided with a BTB connector to connect to the motherboard.
The circuit on the other side of FPCFPC.
BTB connector for connecting to motherboard, model: OK-128GM016/2-35, from OCN.
Silkscreen P113 IC.
Silkscreen 96Cn IC.
Screen printing 3H nv lithium battery protection IC.
Infrared distance sensor – used for wearing detection function, to realize the function of automatically pausing playback when taking off the headphones, and automatically resuming playback when wearing headphones.
On the front of the headphone speaker, a diamond-like diaphragm is used. With the design of internal and external dual magnetic circuits, it has strong driving force and high resolution, bringing highly restored and surging sound quality.
After actual measurement, the size of the speaker is about 13.6mm, which is consistent with the official propaganda.
All components of 1MORE FIT S50 open-ear bluetooth sports headphones.
03/ Summary
In terms of appearance, the charging case of 1MORE FIT S50 adopts a flat design, which is more convenient to carry in pockets or backpacks. The headphones are embedded with memory metal wires, which are flexible and support bending, which can meet the wearing needs of different users. The outside is wrapped with skin-friendly silicone material, which is soft and fits comfortably with the auricle when worn. The headphones are also innovatively added eartips, which can improve sound quality and sound leakage while ensuring comfortable wearing.
In terms of internal structure and configuration, the charging case has a built-in 500mAh lithium battery pack, which supports wired and wireless input power. The wired charging mode adopts the Type-C interface, and the LY ICP1105 power management chip is responsible for charging the battery. The wireless charging receiving coil is equipped with a COPO CP2022 wireless charging transmission chip, which complies with the Qi V1.3 standard and can provide up to 3W of power for portable applications.
The headphone is equipped with a 13.6mm diamond-like diaphragm dynamic driver and a 60mAh soft-pack button battery from HT. AIROHA AB1562E bluetooth audio SoC is used on the motherboard, which supports Bluetooth 5.3 and Airoha MCSync connection technology. Supports next-generation echo cancellation and noise reduction schemes, delivering outstanding audio performance, clear voice, and high-quality sound to headphones. It is also equipped with two MEMS microphones for precise sound pickup.
Source: 52audio
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