As a well-known audio brand, EDIFIER Rambler has a very rich product line. In the field of personal audio, the products cover different types and forms of headphones, desktop speakers, portable speakers and so on. Recently, Rambler launched an iterative upgrade of TWS headset product - TWS5 PRO, which adopts a new design style in terms of appearance, with three fashionable colors: cloud white, mist blue and elegant black.
In terms of functional configuration, it is equipped with a coaxial dual dynamic driver unit, Bluetooth 5.3 chip, supports LDAC high-definition audio decoding, and has passed the Hi-Res Audio Wireless gold standard certification; It adopts multi-mode broadband hybrid active noise reduction technology, providing a maximum noise reduction depth of -43dB, supporting depth noise reduction and broadband noise reduction, as well as ambient sound mode, which can be freely switched according to the usage scenario; Support AI call noise reduction function, accurately identify and eliminate noise signals during calls, and provide clear call voices.
The Rambler TWS5 PRO also supports game mode, bringing 80ms low latency, sound and picture synchronization, and accurate listening and positioning; Support in-ear detection, intelligent identification of wearing status, automatic control of music start and stop, convenient to use and save power. In terms of battery life, the standard mode can support 5.5+19h music playback, the noise reduction mode has a battery life of 4.5+16h, supports fast charging, and can be used for 2 hours after 15 minutes of charging. Let's take a look at the detailed disassembly report of this product~
I Love Audio Network has also disassembled Rambler NeoBuds S, NeoBuds Pro, LolliPods Pro, FunBuds, Lolli 3, TO-U2, MiniBuds, TWS5 true wireless headphones, Rambler HECATE GM45, HECATE GM4 MINI gaming headset, SoundMai series X6, X5, X3 true wireless headphones, Rambler HECATE G4S Thunder Edition, W820NB headset, Products such as Rambler Assistive Listening No. 1 Assistive Hearing/Assistive Listening Headphones, as well as Rambler M0 portable Bluetooth speaker.
First, the Rambler TWS5 PRO true wireless active noise cancelling headphones are unpacked
The Rambler TWS5 PRO packaging box adopts a family-style minimalist design style, drawer structure, headphone design on the front, "EDIFIER" brand LOGO and product name, as well as Hi-Res Audio Wireless and LDAC logos.
The back of the box shows the three colors, specifications and packing list of the product. Product model: EDF200115, Bluetooth version: V5.3, effective distance: 10m, frequency response range: 20Hz-40KHz, input: 5V--200mA (headphones), 5V--1A (charging case), sound pressure level: 92±3dB (A), working time: noise reduction on: about 4.5h (earphones) + 16h (charging case), noise reduction off: about 5.5h (earphones) + 19h (charging case).
The graphic introduction on the side of the packaging box has product features: hybrid active noise reduction, 6mm + 10mm composite diaphragm, IP54 dustproof and waterproof, support EDIFIER CONNECT.
The product features introduced at the top of the box: in-ear detection, Bluetooth V5.3, 80ms low latency and 24.5h composite battery life.
The contents of the box include TWS headphones, earbuds, charging cable and product manual, this one in a mist blue color scheme.
Close-up of silicone earbuds, pre-installed on the headphones, a total of three sizes, used to meet the needs of different users.
The charging cable adopts USB-A to Type-C interface.
The Rambler TWS5 PRO charging case adopts a rounded square design, matte texture, delicate touch, and mist blue color scheme is fresh and elegant. The front of the fuselage is a flat design, with a groove designed for easy opening at the opening of the lid, and a bar indicator is set inside.
The back of the charging case is also flat design, with Type-C charging interface and Bluetooth pairing function button.
The top of the charging case is curved and engraved with the "EDIFIER" brand LOGO.
Open the charging case lid to reveal the placement of the headphones inside, protruding from the cockpit for easy access.
Take out the headphones, the internal structure of the cockpit is at a glance, and the left and right logos of L/R are engraved in the middle of the cockpit, which is convenient for users to quickly distinguish.
Inside the cockpit is equipped with a metal thimble to charge the headphones.
The overall appearance of the Rambler TWS5 PRO True Wireless Active Noise Cancelling Headphones is at a glance, and the headphones adopt a unique bean-shaped in-ear design.
The outside appearance of the Rambler TWS5 PRO is at a glance, the back cavity adopts a metal-like texture, and the touch area of the round groove is designed with the brand LOGO inside, which is highly recognizable.
Close-up of the call microphone pickup hole at the bottom of the back cavity, internal dust screen protection.
The inside of the headphones has a smooth and rounded texture and soft silicone ear tips for a comfortable and stable fit.
In-ear detection sensor close-up of the window, with metal contacts on both sides set to charge the headphones.
Close-up of the red R/right logo on the fuselage, gray L/left printed on the left body.
The side of the headphones is at a glance with pressure relief holes to ensure air circulation inside the chamber.
Remove the earbuds, close-up of the oval nozzle, dust screen protection, and a noise-cancelling microphone unit inside.
Close-up of headphone tuning holes to ensure air circulation inside the sound chamber and improve audio performance.
According to the actual measurement of My Love Audio Network, the total weight of the Rambler TWS5 PRO true wireless active noise cancelling headphones is about 49.6g.
A single earphone wears pre-installed earbuds that weigh about 5.3g.
I LOVE AUDIO NETWORK USED CHARGERLAB POWER-Z KM002C TO CHARGE THE RAMBLER TWS5 PRO TRUE WIRELESS ACTIVE NOISE CANCELING HEADPHONES, AND THE INPUT POWER WAS ABOUT 2.96W.
Second, the Rambler TWS5 PRO true wireless active noise canceling headphones are disassembled
By unboxing, we learned in detail about the new appearance design of the Rambler TWS5 PRO true wireless active noise cancelling headphones, let's enter the disassembly section to see the internal structure configuration information~
Disassemble the charging case
Disassemble the charging case housing and remove the inner cockpit.
The structure of the inside of the charging case case is at a glance.
The structure on one side of the cockpit is at a glance, with two PCB boards fixed in the middle, and the indicator light and Hall elements are connected by a cable.
The structure on the other side of the cockpit is at a glance, and the cable is connected to the Bluetooth pairing function button.
The battery cell is fixed at the bottom of the cockpit, wrapped in high-temperature insulation tape, and the bottom is provided with a sponge cushion for cushioning.
Remove the battery, secure the motherboard with screws underneath, and the battery wires are soldered to the motherboard.
Remove the screws, remove the motherboard, there is a small board to charge the earphones below, and the two PCB boards are connected by cables.
Remove all components from the cockpit.
At a glance of the structure at the bottom of the cockpit, 7 screws are set to secure the earbuds and the charging case cover.
Overview of the circuit on the side of the charging case board.
Overview of the circuitry on the other side of the charging case board.
Close-up of Type-C charging mother.
Wayon's WP1430 overvoltage protection IC automatically disconnects the system to its output pin (OUT) when an incorrect input operating condition is detected. The WP1430 has positive overvoltage protection up to 36V. The internal overvoltage threshold (OVLO) is 6.1V and the overcurrent threshold (OCP) is 2.5A. It also has an internal over-temperature protection (OTP) function that monitors the chip temperature to protect the device.
Wayon WP1430 detailed data map.
SinhMicro SS881A POWER MCU, is an AD type Flash microcomputer with integrated charge and discharge management, integrated power management unit and charging management unit, and provides full-software real-time configurable charging voltage and current settings.
SS881X series is one of the products of Shengsheng Micro POWER MCU series, with rich interface functions and flexible configuration modes, support different low-power options, suitable for portable electronic products that require battery charging and intelligent control, flexible configuration of battery charging voltage and current through software, and built-in perfect protection functions, and the chip itself has passed IEC62368 certification. The use of Shengshengwei's microcontroller can bring streamlined peripherals, excellent performance and flexible and convenient development to products such as TWS headsets.
According to the dismantling of My Love Audio Network, at present, Shengshengwei's POWER MCU has been widely used in more than 40 best-selling models under brands such as Rambler, Black Shark, Redmi, Xiaomi, OPPO, Honor, realme, Nubia, Lenovo, Nokia, HTC, Shengkuo, Wanmo, FIIL, 233621, Kugou, JBL, Philips, Skullcandy, Baidu Xiaodu, Razer, Zimi, Aster, Linger, Aitmingke and other brands.
SinhMicro SS881A detailed data sheet.
Injoinic's IP2501 boost IC is a high-efficiency boost converter with fixed operating frequency, which provides a power solution for products powered by single-, double- or three-cell alkaline, nickel-cadmium, or nickel-metal hydride batteries, or devices powered by single-cell lithium-ion batteries or lithium-polymer batteries.
The IP2501 maintains high efficiency over a wide load current range, the converter exits fixed switching mode to reduce the switching frequency at low load currents, and the IP2501 enters a low output power save mode to maintain high efficiency over a wide load current range. With external feedback resistors, a wide range of voltage requirements can be met by customers. The complete disconnection of the load from the battery during the converter's downtime avoids the need for an external MOSFET and its control circuitry to disconnect the output inputs and provide reliable output overload protection to ensure that overload does not damage the battery. The converter has a low quiescent current of less than 1.5μA and guarantees battery capacity during the shutdown period.
According to the dismantling of My Love Audio Network, at present, there are many TWS earphone charging cases of Honor, Rambler, ZTE, JLab, Haibei, Base, NetEase Cloud Music, Himalaya, Pioneer, Mosheng, PIHEN Pinheng, Bull, Aoji, MPOW, BoAt, Nokia, Lenovo, Shanshui, Ambie, Obixing, Charger and many other brands of TWS earphone charging cases using Yingjixin's power management scheme.
Injoinic IP2501 detailed data map.
Boost inductor with boost chip.
A glance at the circuit on the side of the small board that charges the headphones.
The circuit on the other side of the small board is at a glance, the wire is welded, and the glue is protected.
Close-up of the metal dome connector of the charging case charging the headphones.
List of cable circuits.
Close-up of LED lamp beads, a total of 15, provides different display effects for the bar indicator by the different number of lights, so as to feedback the charging status and remaining power information.
A close-up of the Hall element of the silkscreen AL 3A that senses changes in the magnetic field when the lid of the charging case is opened and closed, and then notifies the charging case MCU and headphones to pair or disconnect from the connected device.
Bluetooth pairing function button close-up, patch welding.
Charging case built-in battery label information, rechargeable lithium-ion battery, model: CEL702334, nominal voltage: 3.7V, capacity: 500mAh/1.85Wh, charging limit voltage: 4.2V, from Dongguan Kinsell Battery Technology Co., Ltd., production date: September 28, 2022.
Tear the external insulation tape, and there is no silk screen information printed on the internal cell.
At a glance of the circuit on the side of the battery protection board, a lithium battery protection IC and 8205 MOS tube with silkscreen Y1A2 are installed to protect the battery from overcharge, overdischarge, and current.
The other side of the protection plate is solder with the wire and the battery nickel sheet.
Headphone disassembly
Disassemble the headphone section and remove the back cover of the headphones.
The inner structure of the cover plate is set up, with a Bluetooth antenna and touch detection patch, as well as an acoustic structure for microphone pickup.
The structure of the internal motherboard of the cavity is at a glance, which fits the design of the cavity, the positioning slot is fixed, and the cable is connected to the motherboard through the BTB connector.
Pick open the connector and remove the motherboard unit.
Overview of the circuitry on the side of the headphone motherboard.
Overview of the circuitry on the other side of the headphone board.
Close-up of MEMS microphone of Radium 2308 MX01 for voice call function to pick up human voices, from Newport Electronics.
BES Hengxuan BES2600 Bluetooth audio SoC, integrated dual-core ARM Cortex-M4F CPU and ultra-low-power Sensor Hub subsystem, with powerful application processing capabilities, support Bluetooth 5.3, support hybrid active noise cancellation and AI call noise reduction, providing stable wireless connection and rich functions for headphones.
According to the dismantling of My Love Audio Network, at present, OPPO, Xiaomi, Samsung, vivo, honor, Redmi, IQOO, iFLYTEK, JBL, Wanmo, Baidu, OnePlus, Transsion and many other brands of true wireless headphones have adopted BES Hengxuan solutions.
Provides a close-up of the clock for the Bluetooth chip.
Close-up of the BTB connector female header connecting the cable.
HYNITRON HK01BP low-power single-channel touch chip, built-in voltage stabilization module/low-voltage reset module, support hardware debounce/environmental adaptive algorithm, etc., with strong anti-interference performance; Pin-configurable into multiple modes.
The HK01BP application circuit is simple, the sensitivity adjustment range is large, and the operating current is extremely low, which is suitable for battery-powered application scenarios; It can be widely used in consumer electronics, electronic toys, household appliances and other products such as Bluetooth headsets.
According to the disassembly of I love audio network, OPPO, vivo, honor, Redmi, OnePlus, NOLO, IQOO, COROS goetzpartners, Tmall Genie, noise and many other brands use Haichuang touch chips.
HYNITRON HK01BP detailed information map.
Voltage regulator IC for silkscreen AN 1R.
IC for silkscreen B172.
The ETA ETA4030 charging IC with silkscreen "VmBN" is a single-cell, fully integrated constant-current (CC)/constant-voltage (CV) Li-ion battery charger with a compact package and minimal external component requirements, making it ideal for portable applications.
The ETA4030 does not require an external sense resistor or blocking diode, and has a built-in thermal feedback mechanism to regulate the charge current to control temperature during high power operation or at elevated ambient temperatures. The ETA4030 has a precharge function that can charge a deeply discharged battery by trickle, and the fast charge current can be programmed by an external resistor.
According to the dismantling of My Love Audio Network, there are currently OPPO, Honor, Nubia, JEET, VANKYO, TaoTronics, Meizu, Tesla, Elvis, Bone Ling, Jinhao, Pamu, Huawei, Xiaomi, OnePlus, Rambler, Redmi, Red Devil, Realme, Wanmo, Shengkuo, Greenlink, Zimi, Baseus and many other brands of audio products using Etai Semiconductor's power management chips.
ETA ETA4030 detailed information map.
Close-up of metal shrapnel connected to a touch detection sensor.
The internal structure of the cavity is at a glance, and the battery cell is fixed in the middle frame.
Close-up of the BTB connector plug connected to the motherboard with the internal component cable of the front cavity.
Remove the middle frame, and the inside of the headphones is a steel-shell button battery.
Overview of the circuit on the PCB board on the back of the battery.
Silkscreen 2Y AF's integrated lithium battery protection IC.
The internal structure of the front cavity is at a glance, and a bracket is provided to hold the battery and act as an isolation function.
Disconnect the solder joints and remove the battery.
Built-in steel shell lithium battery model: M1054S3, nominal voltage: 3.85V, energy: 0.173Wh, from MIC-POWER microelectric new energy.
The battery negative electrode engraved QR code for product traceability.
Close-up of the cable shielded for the battery.
Remove the battery holder.
The internal structure of the front cavity is at a glance, with wires connected to speakers and cables connected to in-ear detection sensors and microphones.
Take out the speaker and see the internal structure of the cavity.
Remove the internal cable of the front cavity.
There are also two fixed magnets on the inside of the cavity wall in the front cavity, an in-ear detection sensor lens and a metal connector to charge the headphones.
A glance at the circuits on the side of the cable.
A glance at the circuits on the other side of the cable.
The front close-up of the coaxial dual dynamic speaker, the top is a titanium diaphragm high-frequency unit, the lower large size of the low-frequency unit, the low-mid frequency unit complements each other, compared with the traditional single dynamic coil has a wider sound field and better resolution.
Close-up of the back of the speaker.
The speaker is compared to the size of a dollar coin.
According to the actual measurement of My Love Audio Network, the size of the mid and low frequency units is about 10mm.
The high-frequency unit size is about 6mm.
Close-up of infrared light sensing in-ear detection sensor, which is used to intelligently identify the wearing state of the headphones, realize the function of automatically pausing music playback when the headphones are removed, and automatically resume playing when the headphones are put on.
The MEMS silicon close-up of the Radium 2248 MX02 is a noise-canceling microphone used to pick up ambient noise with noise-cancelling functions, also from Newport Electronics.
Rambler TWS5 PRO true wireless active noise cancelling headphones disassemble the family portrait.
Third, I love audio network summary
As the initial series of Rambler entering the true wireless headphone market, Rambler TWS (digital) after more than three years of silence, was named after it again, and successively launched Pro, ANC and other versions, the appearance texture has been greatly improved, and the functions have been fully upgraded, so as to provide users with a better experience. Compared with the TWS5 four years ago, the TWS5 PRO disassembled this time is very different in other aspects except for the spiritual continuation in the name.
The new headphone appearance design of the Rambler TWS5 PRO is spliced through the process of metal-like back cavity + rounded front cavity, making it both textured and comfortable to wear. In terms of internal main configuration, the charging case has a built-in CEL Kinsel 500mAh lithium battery, adopts Type-C interface input power, and the port is set Wayon WP1430 overvoltage protection IC, which is controlled and charged by the built-in battery by SinhMicro SS881A POWER MCU, and the Injoinic IP2501 boost IC boosts the built-in battery to charge the headphones.
The earphone is equipped with a 6+10mm coaxial dual dynamic unit, and two Xingang Electronics MEMS microphones are cooperatively picked; Built-in MIC-POWER micro-electric new energy 3.85V 0.173Wh steel shell button battery power supply. On the motherboard, BES Hengxuan BES2600 Bluetooth audio SoC, ETA ETA4030 charging IC, and HYNITRON HK01BP low-power single-channel touch chip are adopted.