Apple TWS headset products ushered in an update in the fourth quarter of 2021, and successively launched AirPods 3 true wireless earphones and Beats Fit Pro true wireless noise cancelling earbuds. Although the two products have different positioning, they both apply Apple’s current top technology, support the complete Apple ecosystem, and provide high-quality wireless audio experience for different users such as iOS and Android.
Beats Fit Pro true wireless noise cancelling earbuds were released in November and officially went on sale in December. In the appearance design, flexible earwings are added to the previous Beats Studio Buds to provide more people with comfortable and stable wearing. In terms of functional configuration, it is equipped with a custom acoustic platform, Apple H1 chip, skin recognition optical sensor, gyroscope and acceleration sensor, supports three listening modes of active noise cancellation, transparency mode, and adaptive equalization, and supports dynamic head tracking spatial audio. The specific performance of the headset can be seen in the review article some time ago: Beats Fit Pro review: new customized acoustic platform, full version of Apple TWS headset ecology.
The Beats products previously teardown by 52audio include: Beats Studio Buds, Beats Powerbeats PRO, BEATS FLEX, BEATS SOLO PRO, etc. Let’s take a look at the detailed dismantling report of this product.
|1. Beats Fit Pro charging case teardown
We connected to the appearance design of this product by opening the box. Let’s enter the disassembly part to see the difference between the internal structure configuration information and the AirPods Pro with the same paper data.
Remove the cockpit decoration cover on the charging case.
The inner structure of the cover is fixed with glue and positioning posts.
The cockpit structure of the earphone after the cover is removed.
Pry open the charging case cockpit, the battery is fixed at the bottom of the charging case, and the small power input board under the battery is connected to the PCB board at the bottom of the cockpit through a cable.
The battery cable is connected to the small board with a BTB connector, and a metal cover is fixed on the top.
Cockpit bottom structure.
Metal thimble structure for charging earphones.
The magnet used to absorb the earphone is fixed in the groove of the frame, and the upper layer is fixed by a metal cover plate.
A small PCB board is fixed on the cavity by screws, and a metal thimble wire for charging the earphone is welded on it, and a BTB connector for connecting the battery cable, as well as indicator lights and function buttons are provided.
The bottom of the cockpit is used to attract the magnet of the charging case cover.
The LED indicator is provided with black foam to prevent light leakage.
Remove the screws and take off the small board, the function button keycap structure below.
The circuit on the back of the small board is provided with a micro-motion button for bluetooth pairing and connection.
The bottom structure of the charging case cavity.
The structure of the indicator light guide column.
The bracket for fixing the battery is fixed on the charging case shell through a buckle. A small power input board is provided at the bottom of the bracket.
Remove the battery unit and bracket, the internal structure of the cavity.
The power input board uses sockets and wires to input power for the built-in battery.
The power input board, the components on the board are covered by black hard glue, and the chip information cannot be obtained.
Remove the screw, take off the small power input board, a metal nut is used in the screw hole.
One side of the power input board.
The other side of the power input board.
Type-C charging interface female seat, engraved with “19Y B1” information.
A sealing rubber ring is provided at the interface of the female seat to prevent water and dust.
The input protection IC of silk screen J3WE.
BTB connector female seat connected with the function key board.
Flat cable BTB connector male seat.
Charging case Internal rechargeable polymer lithium-ion battery model: AEC751646, rated capacity: 600mAh/2.3Wh, rated voltage: 3.84V, charging limit voltage: 4.4V, manufacturer: Apower Electronics Co., Ltd..
The silk-screen information on the battery cell is consistent with the external label.
The bottom structure of the battery support is provided with a sponge pad to isolate the small power input board.
The positive and negative solder joints of the nickel sheet of the battery are protected by black insulating tape.
The back of the battery circuit protection board.
On the front of the circuit protection board, there is a Mitsumi integrated lithium battery protection IC with the silk screen “KU 127”, thermistor and a resettable fuse.
|2. Beats Fit Pro earbuds teardown
Enter the headphone disassembly section. The cavity is opened by heating and melting the glue along the parting line, and there is a cable connection between the front and rear cavities.
The internal structure of the back cavity.
The internal structure of the front cavity, the battery is fixed in a transparent frame.
The main board unit is arranged on the side of the battery frame.
The internal components of the back cavity are fixed with a lot of glue, and two microphone units can be seen.
The positive and negative electrode solder joints of the battery are provided with an IC with a silk-screened QR code.
The main board is provided with a sponge pad to be separated from the shell, and the coaxial line connection point is covered underneath.
Coaxial connection socket, connect the bluetooth antenna and the motherboard.
Pick up the coaxial cable plug.
Solder the positive and negative solder joints of the battery.
The solder joint for connecting the speaker to the motherboard cable.
Then open the solder joints to separate the battery and the main board unit.
The inside of the headset is disassembled.
Engraving information on the battery Model: M1254S2, rated voltage: 3.7V, rated capacity: 0.22Wh, from MIC.POWER.
According to 52audio, there are already Beats Studio Buds, 233621, AUKEY, Edifier, Jabra, JEET, Klipsch, MEIZU, RHA, UGREEN, vivo, Baidu and other brands of audio products that use MIC-POWER button batteries.
The internal structure of the front cavity.
The optical sensor assembly is also fixed on the cavity wall by a large amount of glue.
Take out the speakers.
The internal structure of the sound cavity, you can see the inward microphone.
Beats custom speaker front.
The back of the speaker.
After actual measurement, the speaker size is about 9.5mm.
Take out all the components inside the front chamber.
The internal structure of the front cavity.
Inside the micro ventilation hole at the bottom of the sound tube, a fine dust-proof net is arranged.
The front of the internal circuit of the earphone.
The back of the internal circuit of the earphone.
The metal contacts for charging the earphones and the skin recognition sensor are used for the wearing detection function.
Laser carving S2672 9310 MEMS inward microphone, used for active noise cancelling, call, adaptive equalization and other functions to pick up sound.
The chip on the side of the small board for welding the positive and negative poles of the battery is covered with black hard glue.
On the other side is a sensor with a silk-screened QR code, and there is a similar model on AirPods Pro.
The circuit on the side of the earphone motherboard, the square silver area is the Apple H1 system chip.
The circuit on the other side of the earphone motherboard.
Apple customized 338S00517-B1 PMIC, which is protected by thick black hard glue around it.
Silk screen nNG IC.
Silk screen YY CCE J3H IC.
Apple H1 chip uses the same packaging method as AirPods Pro, instead of the latest packaging of AirPods 3.
The inner side of the pressure relief hole in the back cavity of the earphone is protected by a fine dust-proof net.
Laser carving 125ALC MEMS noise cancelling microphone is used for active noise cancelling and call noise cancelling functions to pick up external environmental noise.
The call microphone of Laser Carving S2672 9310 is used for voice call pickup.
At the bottom of the cavity, you can see the small board of the function buttons.
All components of Beats Fit Pro true wireless noise cancelling earbuds.
Beats Fit Pro true wireless noise cancelling earbuds can be seen as a fusion of the advantages of the previous two generations in terms of design. The charging case returns to the horizontal rounded square design of the first-generation headset, but the volume has been greatly reduced, compared with the second-generation headset, the battery capacity is greatly improved. The headset continues the compact and exquisite design of the second generation, and adds flexible and flexible earwings, which can better adapt to the auricle structure of different people and provide a comfortable fit and stable wearing effect.
The internal structure design is complex and exquisite, especially the inside of the headset, which contains a large number of components in such a small body, which has a very high level of integration. The charging case still uses the Type-C interface, which is more convenient for most users at present. The built-in battery capacity has been increased to 600mAh, and a 3.84V high-voltage battery is used to achieve a longer-lasting battery life. In terms of internal circuits, important components IC are coated with a large amount of hard glue for protection, and relevant information cannot be obtained.
Inside the Beats Fit Pro earbuds, all components are connected in series on an FPC cable, and in order to make better use of the internal space, based on the appearance of the earphone, the earphone motherboard and battery protection board are placed horizontally on the side of the battery. The headset is equipped with a 9.5mm customized dynamic driver, and 3 MEMS microphones are used for active noise cancelling, call noise cancelling, and adaptive equalization mode pickup. The motherboard adopts Apple H1 chip similar to AirPods Pro, and Apple customizes 338S00517-B1 PMIC and other configurations.
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