1: Preamble

With the recovery of music mobile phones in recent years, many audio enthusiasts have once again focused on portable Hi Fi products. There is one smart phone, which is easy to operate, and there are many third-party music apps. As a front-end, it is really the best choice. However, due to the lack of money in smart phones, it is impossible to accommodate overly complex audio module components. The overall sense of hearing and quality can only be said to be better than ordinary smart phones, but there is still a lot of gap from professional players. Is there no such thing as a best of both worlds solution? The answer must be yes. Bundling is the best solution. As the front end, mobile phones can not only ensure the convenience of operation, but also solve the problem of lack of sound sources. Portable ear amplifiers can ensure the quality of sound. OPPO HA-2SE portable HiFi headphone amplifier is a product based on this. Can its performance satisfy the burning friends?

2: Appearance introduction

On the package, OPPO HA-2SE adopts a minimalist design, with product drawings printed on the front of the package, and the "small yellow label" on the upper right corner is very eye-catching. The back and side of the package are the relevant parameters of OPPO HA-2SE.

After opening the package, it can be seen that the OPPO HA-2SE body is placed on the first layer, and the second layer is related accessories.

For the family portrait, OPPO HA-2SE is equipped with a VOOC flash charger adapter, a USB A - USB micro flash charger data cable, 3.5mm-3.5mm stereo audio cable, a USB A-Lightning data cable, a USB micro-B - USB micro-B data cable, two silica gel straps, and three pack certificates. In terms of accessories, there are all kinds of accessories to ensure that users can use them as soon as they get their hands on them.

OPPO HA-2SE is equipped with a 3000 mAh rechargeable lithium battery, which supports OPPO's own VOOC flash charging protocol. The maximum output power of the charging adapter is up to 20W, and 70% of the power can be charged in 30 minutes. The most interesting thing is that OPPO HA-2SE can also be used as a mobile power supply. Now that mobile power has become the standard configuration for almost everyone's travel, HA-2SE provides high-resolution sound performance without increasing the weight of users. For iPhone 7 users who do not have a 3.5mm headphone jack, this is like killing two birds with one stone. (OPPO HA-2SE weighs only 175 grams)

The appearance design of OPPO HA-2SE can be well summarized in one sentence: low-key but luxurious. The whole piece of cowhide on the surface covers the aluminum alloy fuselage. The cowhide is designed with lychee lines and stitches. The beauty, feel and strength of the fuselage are perfectly integrated.

OPPO HA-2SE is equipped with a volume knob on the top to integrate the on-off function. The knob is designed with lines up and down, and the excellent damping can provide clear feedback for users.

OPPO HA-2SE can be compatible with the new version of iPod, IPhone, iPad and Android mobile terminals can provide audio decoding and output high-quality sound performance through bundling. In addition, HA-2SE also supports asynchronous USB DAC input, compatible with PC/MAC computers, and supports playback of high-resolution audio by replacing its built-in sound card. Of course, basic functions such as audio input and linear output are also available. Users can switch functions through the paddles at the bottom of the fuselage.

OPPO HA-2SE provides two levels of gain adjustment. If it is a headset with high resistance and low sensitivity or an earplug that is difficult to push, users can choose high gain, while if it is a earplug with high sensitivity and low resistance, users can choose low gain. In addition, OPPO HA-2SE also has a subwoofer enhancement switch, which can be adjusted by the user according to different music styles.

OPPO HA-2SE has integrated a power indicator on the side of the fuselage. Users can check the remaining power by clicking the side power key. If you press the power key for a long time until the power indicator turns blue, HA-2SE will become a mobile power source to charge other devices.

OPPO HA-2SE bundling display. With the silicone strap and data cable provided with the machine, HA-2SE can complete bundling connection without affecting the operation of the phone. At this time, the phone becomes the front end, and users can listen to songs or charge the phone through HA-2SE decoding.

3: Brief comment on audition

OPPO HA-2SE adopts ESS Sabre32 Reference ES9028-Q2M decoding chip, and is equipped with TPA6120 headphone amplifier. OPA1602 and OPA1662 are used in the operation amplifier. As far as hardware quality is concerned, it is really excellent, but no matter how strong the specifications of audio devices are, they must be accepted. In view of the positioning of OPPO HA-2SE, the author chose iPhone as the digital turntable. First, because there are many iPhone users, and second, it is well-known that iPhone 7 has eliminated the 3.5mm headphone jack, which is representative. In terms of earplugs, the author selects the current flagship SE846 of Shure Mobile Iron. The sound source is lossless music on Netease Cloud Music.

Listen to Song 1: Eason Chan/OK

A typical Chen's love song can make you feel every bit of the lyrics in the song. Listen to it with OPPO HA-2SE and you can find that the performance of resolution and separation is very good, and the three frequencies are relatively balanced. The human voice is relatively close to the ear, but the relaxation is poor. The high-frequency part has excellent analytical power, and the transient is fast. There is no sense of muddling. The low-frequency part is just right on the whole. Although the volume is small, it is good to be able to retract and release freely.

Listen to Song 2: Jane Zhang/My Dream

Zhang Liangying's song "My Dream" expresses her understanding of persistence with her unique voice. After listening to OPPO HA-2SE, the piano solo was attracted from the beginning of the song, and the sound field was large, while the close human voice was immediately attracted by Zhang Liangying's voice, which was full of poison. Intermediate frequency extension is very good, with a sense of hovering around the ear. High frequency gives a clean feeling with fast transient and excellent analysis. With a good tie, you can enjoy a song very much.

Listen to Song 3: Charlie Puss/She Don't Talk Anymore

“We Don't Talk Anymore” It should be regarded as a popular song heard by Jiezhi Lane this year. The light melody and fast beat instruments with 100 times per minute make people want to move, and the cruel lyrics make people recall a lot of youth. As far as the author is concerned, he likes the performance of OPPO HA-2SE very much. The transient performance and analysis of high frequency and excellent performance restore the details of the fast metronome very well, and the low-frequency texture is good, In addition to excellent control, it is very enjoyable to listen to, and the excellent knot image of the mid-range with impartial sound repair makes both male and female voices perform well, plus a certain extension makes people hear ear oil.

4: Summary

Through one week's experience, the author is quite satisfied with OPPO HA-2SE. OPPO HA-2SE has a high playability. It can not only be bundled with smart phones to decode and output high-quality audio, but also be used as a sound card with computers. Audio input amplification and linear output are even more important. A 3000 mAh battery is built in the lightweight volume and supports VOOC flash charging, which solves the awkward slow charging problem of previous portable ear amplifiers. In addition, it can also be used as a mobile power supply. All these indicate that OPPO has made targeted design for the pain points of current portable ear amplifiers. The combined sound of ES9028-Q2M+TPA6120+OPA1602+OPA1662 also has good performance on portable devices. Of course, there may still be many gaps with professional desktop decoding devices, but as a portable device, it is really rare. If you have a certain pursuit for sound, and hate the anti human operation of professional players and the tragic life of downloading music every day, OPPO HA-2SE will be a good solution, which is worth trying.

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