With the development of the true wireless earphones market becoming more and more mature, many brands have begun to focus on product functions and quality. ANC active noise reduction is a function that tests the brand’s R&D and technical strength. 233621 Zen is a product that focuses on active noise reduction. Since its release, it has received high attention, not only because it first released Qualcomm’s flagship chip QCC5124, but also controlled the product price at a relatively affordable price, and the market responded warm.
233621 Zen true wireless active hybrid noise reduction earphones uses Qualcomm’s flagship chip QCC5124, adopts feedforward + feedback active hybrid ANC noise reduction technology, and the official advertised maximum noise reduction depth is -35dB; the chip supports Qualcomm TWS+ dual transmission, which can reduce latency. Supports aptX/AAC audio decoding to unlock more music details; the earphones supports Qualcomm cVc call noise reduction technology, voice communication is clearer.
233621 Zen earphones uses a 10mm graphene diaphragm-coated speaker unit to improve sound quality. The earphone noise reduction mode has a battery life of 7 hours for a single time, and the noise reduction battery life is up to 10 hours. The earphone supports fast charging, charging for 10 minutes and using it for 1 hour. Compared with similar products, the battery life has obvious advantages.
The 233621 Zen true wireless active hybrid noise reduction headphones have been disassembled and analyzed in depth before, let’s take a look at the daily experience of this product!
Appearance design
The charging case of the 233621 Zen true wireless active hybrid noise reduction earphones is similar to a powder box design. The appearance and size are relatively similar, with circular design elements throughout. There is a concave surface at the center of the cover for easy access to the charging case; the “233621” brand logo is printed on the outer arc surface, and the color corresponds to the color of the earphones.
The front of the charging box is designed with a groove for easy opening of the lid, and there is an indicator light on the bottom to facilitate users to understand the working status of the charging box, which is considerate for consumers.
The charging case uses the USB Type-C interface input power commonly used in consumer electronics products, which can be blindly plugged in front and back, and is easy to use.
Open the charging case, you can see that the color of the charging cockpit is the same as that of the earphones, both are purple, and the inside and outside of the charging case form a contrasting color match.
The shape of the earphones is like a letter “Q”, and there is a call microphone in the protruding part, pointing in the direction of the human mouth, directional pickup, and improving the voice call ability. The touch area of the earphones is slightly protruding, with the 233621 brand logo on it. The purple of the main body of the fuselage forms a contrast with the outer shell, which is consistent with the design concept of the charging box.
The inside of the earphone is displayed with four metal contacts, two are used for product testing and other purposes, and the other two are used for daily charging; the optical sensor next to the ear is used for in-ear detection; this area is recessed to avoid contact with the ear while wearing discomfort.
The earphone is an in-ear design, and the mouthpiece can go deep into the ear canal, with silicone eartips to form a certain passive noise reduction effect.
After actual measurement, the overall weight of the 233621 Zen true wireless active hybrid noise reduction earphones is about 57.1g. The weight of a single earphones is about 6.7g.
02/ Functional Experience
After unpacking the box, we have a comprehensive understanding of the design of the 233621 Zen true wireless active hybrid noise reduction earphones. The following will share its actual experience for everyone. Mainly from the interactive experience, music effect experience, active noise reduction and call noise reduction, compatibility with different mobile phones, as well as charging and battery life, these aspects of experience and testing. Let’s take a look at how this product performs in daily use.
①. Interactive experience
When you use it for the first time, take out the earphones from the charging case and it will automatically enter the pairing mode. When you use it later, you can connect with the paired device by taking out the earphones, and the connection speed is faster. When connecting a new device, you need to tap a earphones three times in a row, and the third long press for 2 seconds, which is a bit more complicated.
233621 Zen supports two interactive methods: tap and long press: click on the left earphone to increase the volume, click on the right earphone to decrease the volume; double click to play/pause music, long press the left/right earphone 2 You can cut the song in seconds; double-click to answer/hang up during a call, and long press for 2 seconds to reject the call; triple-click to switch between noise reduction on, noise reduction off, and transparency mode; basic operations can also be used without the phone.
The better point is that the prompt sound of the earphones is the sound recorded by a real person, and there are prompts for every operation, which sounds more cordial.
233621 has an APP of the same name that can be connected to the earphones product. The product interface is shown in the figure. It can control the playback and pause of the earphones, switch the noise reduction mode or the ambient sound mode, and can upgrade the earphones firmware. 233621 has both an Android client and an iOS client.
②. Active noise reduction and call noise reduction
The 233621 Zen earphones features ANC active noise reduction function, and the product nickname “Noise Reduction Golden Cudgel” is also printed on the box, which reflects the brand’s confidence in its noise reduction capabilities. The earphones is equipped with Qualcomm’s QCC5124 flagship chip, built-in integrated noise reduction processing technology, with the 233621 patented noise reduction algorithm, the official advertised maximum noise reduction depth can reach -35dB.
The earphone adopts an in-ear design, which can physically isolate part of the noise. At the same time, turning off the noise reduction of the earphone is actually a weak noise reduction mode. Used in some office environments, it can balance ear pressure and have a certain noise reduction effect; after active noise reduction is turned on , Headphones can further suppress mid- and low-frequency noise, which can effectively cope with noisy scenes such as commuting; the ambient sound mode simulates the effect of not wearing headphones, basically no delay is felt, and it is convenient to talk with friends around you.
As mentioned earlier, there is a call microphone in the protruding part of the 233621 Zen housing, which is closer to the human mouth, and directional pickup. With the eighth-generation Qualcomm cVc call noise reduction technology, the voice intelligibility during the measured call is relatively high. There is also better suppression.
③. Music effect experience
233621 Zen true wireless active hybrid noise reduction earphones have a built-in 10mm graphene diaphragm coating dynamic driver, support 233621 dynamic balanced tuning professional technology; the chip supports aptX audio codec, when connected to some Qualcomm phones, it can support up to 16bit/44.1kHz playback Specifications of high-quality music. The earphone has obvious three-frequency layering, low frequency has a certain sense, clear human voice, high frequency is not harsh, and the overall performance is good.
④. Headphone and mobile phone connection compatibility test
In terms of earphones and mobile phone connection compatibility, the 233621 Zen earphones was tested whether it can display the earphones power and interactive operations normally when connected to iPhone12 Pro Max, iPad, Xiaomi 11, Huawei Mate 40 Pro and Samsung S20 Ultra.
The 233621 Zen earphones is connected to the iPhone12 Pro Max. The battery level can be displayed normally in the status bar. The shortcut center can slide to adjust the volume. Using the iOS14 desktop plug-in will be more intuitive for battery display, so that users can learn about the remaining battery power of the earphones in real time and charge in time.
Click + long press for 2 seconds to activate the Siri voice assistant. 233621 Zen true wireless active hybrid noise reduction earphones are connected to an iPad tablet computer, and the experience is the same as that of the iPhone.
Xiaomi 11 status bar does not display the power of the earphones, Bluetooth settings and negative one screen display power, the earphones connection defaults to aptX audio encoding.
Click + long press for 2 seconds to activate Xiaomi 11 voice assistant. The status bar of Huawei Mate 40 Pro can display the power of the earphones, and the earphones connection defaults to AAC audio encoding.
Click + long press for 2 seconds to activate Huawei Mate 40 Pro voice assistant. 233621 Zen is connected to Samsung S20 Ultra, the status bar does not display the earphones battery level, it is displayed in the Bluetooth settings, and the default is aptX audio encoding.
Click + long press for 2 seconds to activate the Bixby voice assistant.
⑤. Charging and battery life
The 233621 Zen earphones turns on the noise reduction mode, and a single battery life can reach 7 hours. In non-noise reduction mode, a single battery life is up to 10 hours. With charging case, the total battery life for noise reduction is 22 hours. And the 233621 Zen true wireless active hybrid noise reduction earphones supports fast charging technology. The earphones can be charged for 10 minutes to bring noise reduction for 1 hour, which is enough to cope with a single day of high-intensity use.
Use the ChargerLAB POWER-Z KT002 portable power tester to perform a wired charging test on the 233621 Zen earphones. The input power is about 2.0W.
03/ Summary
| Appearance
The 233621 Zen true wireless active hybrid noise cancelling earphone adopts the design concept of concentric circles. Both the headphones and charging case use a lot of curves, which are very round. The charging case is similar to a girl’s powder box design, which is relatively small and portable; the earphone adopts a bean-type in-ear design, which is also lighter; the earphone also uses a contrast color design, which is lively and fashionable.
| Active noise reduction and call noise reduction
The 233621 Zen earphones features the ANC active noise reduction function, and the product nickname “Noise Reduction Golden Hoop” is also printed on the box, which reflects the brand’s confidence in its noise reduction capabilities. The earphone adopts an in-ear design, which can physically isolate part of the noise. The earphone has two modes of weak noise reduction and strong noise reduction. The former can balance ear pressure and have a certain noise reduction effect. The latter is suitable for daily commuting and use in noisy environments; The earphone has an excellent call noise reduction function, and it also has a better suppression of wind noise.
| Music effects
233621 Zen has a built-in dynamic driver with 10mm graphene diaphragm coating, which supports 233621 dynamic balanced tuning professional technology; the chip supports aptX and AAC audio codec, suitable for most Android phones and iPhone phones; the earphones’s tri-band equalization has an obvious sense of hierarchy , Low frequency has a certain sense, moderate extension, clear human voice, high frequency is not harsh, which can meet the needs of daily music and entertainment.
| Connect and interact
The 233621 Zen earphones supports the interactive mode of tapping and long-pressing. Pairing with a new device, restoring settings, and daily volume adjustment, noise reduction mode switching, and waking up the voice assistant can all be achieved through these two methods. At the same time, the corresponding operation is also There is a voice prompt; in addition, the earphones has a matching APP to upgrade the firmware.
Combining earphone teardown and review, the 233621 Zen has a simple and stylish appearance. It is equipped with Qualcomm’s QCC5124 flagship chip, supports active noise reduction, and has a long battery life. It is a cost-effective TWS noise reduction earphones.
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