Realme Pocket bluetooth speaker teardown

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Before this, realme released two portable bluetooth speaker products realme Cobble and realme Pocket, but so far they have not been sold in China. 52audio recently got the realme Pocket, this time I will show you the details of its exterior design and internal structure configuration information.

The realme Pocket bluetooth speaker adopts an oval design in appearance, with black and camouflage desert gray colors. It is small and lightweight, weighs only 113g, and is very easy to carry. The configuration uses a 3W bass enhancement driver unit, with three equalizer presets. Support bluetooth 5.0, support low-latency game mode, support IPX5 waterproof. Built-in 600mAh battery, supports 6 hours of playing time.

52audio also disassembled realme Buds Air 2, realme Buds Air Pro true wireless noise reduction earphones, realme Buds Q, realme Buds Air Neo, realme Buds Air true wireless bluetooth earphones. Let’s take a look at the detailed disassembly report of this product.

|1. Realme Pocket bluetooth speaker design

realme Pocket

The realme Pocket bluetooth speaker has an oval design, small in size, and equipped with a portable cord. The sound output cover on the top of the speaker is covered by a metal mesh cover on the entire surface and is designed with a realme brand LOGO.

There are foot pads at the bottom of the speaker, and “Dare to Leap” slogan is printed on the middle silk screen. Part of the product parameter information is printed around, including the product name realme Stone, nominal voltage: 3.7V, input: 5V-1A, realme Chongqing Mobile Communications Co., Ltd., made in China.

Speaker non-slip foot pads.

There are two function buttons on the front of the speaker, the left side of the button is the microphone opening, and the right side is the indicator light.

The speaker indicator is used to feed back the remaining power and pairing status.

The speaker microphone opening is used for voice call pickup.

The charging port on the side of the speaker is equipped with a dustproof and waterproof plug.

The speaker uses a Type-C charging interface, which has better compatibility. You can use a set of charging equipment with your Android phone when you go out.

The other side is designed with a lanyard, which can be worn on the wrist or tied to the backpack to make it more portable.

After actual measurement, the weight of the realme Pocket bluetooth speaker is only about 112.3g.

|2. realme Pocket bluetooth speaker teardown

Enter the disassembly part and pry open the metal cover of the top sound hole, you can see the fixing screws of the speaker.

There are two units inside the cavity, one is a full-frequency horn and the other is a passive radiating diaphragm.

Remove the screws, open the cavity, and the internal structure of the cavity.

The internal structure of the front cavity, the horn is fixed by screws.

The internal structure of the rear cavity, the main board is a special-shaped design, fixed by screws.

Remove the screws and take out the motherboard. The motherboard has wires connected to the microphone on the cavity wall.

The realme Pocket bluetooth speaker is disassembled, and the components are connected by wires, and the wires are all set with foam wrap to prevent noise from resonance.

On the front of the speaker unit, the diaphragm adopts a paper cone rubber ring.

The back of the speaker unit, silk-screened model 10113, impedance: 4Ω, power: 3W.

The size of the horn is compared with the RBM coin.

After actual measurement, the speaker size is about 37mm.

The electret microphone inside the speaker is used for voice call pickup.

The speaker has built-in lithium ion battery model: 622539, rated voltage: 3.7V, rated capacity: 600mAh/2.22Wh, charging limit voltage: 4.2V, made in China, from Xinyu Ganfeng Electronics Co., Ltd.

Silkscreen information on the battery.

The battery is equipped with a circuit protection board, and there are two thermistors on the protection board to detect the battery temperature.

Screen printing Y1ZN battery protection IC.

MOS tube with silk screen L8810.

The circuit on the front of the motherboard.

The circuit on the back of the motherboard.

Sponge pad used to isolate the motherboard and battery.

Two function buttons.

470μF filter capacitor.

220μF 10V filter capacitor.

AnaTek ANT8817 audio power amplifier is a synchronous adaptive boost, ultra-low EMI, ultra-high efficiency, single-channel Class H audio power amplifier. The chip integrates a multi-channel power rail adaptive boost unit. When the lithium battery is powered by 3.7V, it can drive a 4Ω load under 1% distortion and can output a constant power of 3.5W. The ALC function can automatically detect the output distortion and dynamically adjust the amplifier gain to ensure that the output audio signal does not appear large distortion. ANT8817 adopts ultra-low EMI technology, which enables the amplifier to achieve EMI characteristics comparable to class AB power amplifiers when working in class D mode.

Audio CTRL pin, supports voltage setting working mode, and can set ALC on and off. The ALC function can automatically detect the output distortion and dynamically adjust the amplifier gain, which can avoid the output clipping distortion caused by the excessive input signal amplitude such as music or the fluctuation of the battery voltage, which significantly improves the quality of music and improves the sense of hearing. In addition, ANT8817 has built-in over-current protection, over-heat protection, and short-circuit protection functions to ensure the reliability and stability of the chip in various application environments.

The charging IC of silkscreen 7102 is used to charge the internal battery of the speaker.

Actions ATS2819 bluetooth Audio SoC is a highly integrated single-chip bluetooth audio device. It can also be used as an intelligent voice assistant, compatible with DMA (Baidu), GMA (Alibaba), Xiaoai (Xiaomi) and many other protocols.

ATS2819 integrates a high-performance transceiver, a rich baseband processor and bluetooth audio mode. Support bluetooth V5.0, compatible with V4.2/2.1+EDR, and support dual mode (BR/EDR+ low energy controller). ATS2819 integrates SBC decoder and CVSD codec, and also supports PLC technology and AEC echo cancellation to provide high audio quality during voice calls.

52audio understands that well-known brands such as Baseus, Motorola, Himalaya, FUNCL, BULL, UGREEN, RODE, etc. have adopted a large number of Actions bluetooth master chips.

The 26.000MHZ crystal oscillator provides the clock for the bluetooth chip.

All components of the realme Pocket bluetooth speaker.

|3. Summary

As realme’s first product to enter the bluetooth speaker market. The realme Pocket bluetooth speaker is designed to be compact, exquisite and portable, making it a music companion that can be worn personally.

In terms of configuration, the realme Pocket compact body is equipped with a speaker unit with an output power of 3W and a passive radiating diaphragm to enhance the low-frequency volume. Equipped with AnaTek ANT8817 audio power amplifier, it supports ALC function to ensure that the output audio signal will not appear large distortion. It also has built-in overcurrent/overheat/short circuit protection functions to ensure the reliability and stability of the chip in various application environments.

The realme Pocket speaker main control chip uses Actions ATS2819 bluetooth audio SoC, supports bluetooth 5.0, integrates SBC decoder and CVSD codec, supports PLC technology and AEC echo cancellation to provide high audio quality in voice calls. The speaker has a built-in battery capacity of 600mAh, from Xinyu Ganfeng Electronic. An electret microphone is used for voice call pickup.

Source: 52audio

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