Many people don't know what the "headphone amplifier" is for? Let's give a brief introduction.

The impedance of ordinary low-end earphones is generally very low, about 16~32 Ω. Audio players such as walkman and mobile phone are all low impedance outputs, just matching, and earphone amplifiers are not required at this time. However, in order to obtain better sound effects, high-end HIFI fever earphones will adopt high-density coil long stroke design, so that the DC impedance will be as high as 200-600 ohms. Ordinary audio players will encounter such high impedance earphones, which will greatly reduce the output power, thus damaging the frequency response curve, so the original performance of the device cannot be exerted. At this time, headphone amplifiers are needed. The "headphone amplifier" can not improve the sound quality, but only improve the power of the signal.

Tips: The following evaluation team will use low impedance earphones to experience the process, so that everyone can clearly distinguish the earphone plug and the recording plug.

The Leisheng GR-1 headphone amplifier is packed in a white cardboard box. The top left corner is the brand logo with a sense of design, and the bottom right corner is the product model. On the side of the package is the brand slogan of Laisheng, "Extreme listening, never changing Laisheng". The overall packaging is white with silver gray tone, creating a low-key atmosphere.

On the back of the package of Laisheng GR-1 headphone amplifier is the product barcode, two-dimensional code and product highlights: material technology and industrial design. The combination of the two product highlights is the origin of the excellent texture of the product.

When opening the box, the first thing that came into view was the main body of the product, the audio recording cable (both ends are audio plugs) and the metal product logo, which was basically the same as the product picture on the package. The feeling of the small editor was that the Laisheng GR-1 headphone amplifier gave a strong sense of immediacy of the new fashion fever level E-sports products.

International practice, family photo, product body, audio recording line, metal logo, Android data line, rubber ring, manual and warranty card. There are a lot of small parts, giving people a rich and diverse catch up.

Full details of the Leisheng GR-1 headphone amplifier. The front is a concave convex design full of design elements, with a retro metallic matte feel, which is really compelling. The logo is gravure printed in the center, and there is nothing else; The back is flat. The same logo and brand abbreviation gravure print echo the front. The arc concave design on the left and right makes it easier to "master" the handheld; The control interface of the product is on the top. From left to right, it is: audio OUT, indicator light/switch, audio IN and volume adjustment knob. The knob is marked with volume; The bottom is the charging port and charging indicator.

The audio recording cable attached with the Leisheng GR-1 headphone amplifier is made of materials that can be seen as conscience products. Two circles without microphone, the workmanship at the handle and the connecting line in the middle are similar to the cable, which is pulled by pulling. In addition, both ends of the audio recording line are identical.

The Android data cable (for charging) in the accessories of the Leisheng GR-1 headphone amplifier is of ordinary material and will not be displayed; As for the attached metal logo, it is the same material as the main body of the product, and can be pasted in other places, similar to the experience of the Transformers logo.

The instructions of the Leisheng GR-1 headphone amplifier and the warranty card are integrated into a unique package, packed in a black envelope, which is completely consistent with the overall style.

The Leisheng GR-1 headphone amplifier uses a regular Android data cable for charging. The red light indicates that it is in the charging state, and the blue light indicates that it is fully charged.

When the Leisheng GR-1 headphone amplifier is in normal use, connect the IN and audio output terminals of the Leisheng GR-1 headphone amplifier with a pair recording cable, plug the headphone connector into the OUT of the Leisheng GR-1 headphone amplifier, turn the power switch to ON, and adjust the volume to an appropriate position.

As mentioned at the beginning of the small edition, it is not necessary to use earphone amplifiers with low impedance earphones. Is this earphone amplifier unnecessary for low impedance earphones? I didn't realize that there was such a purpose, an extremely unexpected demand - amplifying the audio volume. Small editors have the habit of recording in meetings, but the recording effect of mobile phones is not as good as that of professional recording pens, which can output high fidelity sound quality. Even because the recording point is far away from the sound point, and the recording is too small to be heard in the later stage, the on-site restoration can be achieved with the help of the Leisheng GR-1 headphone amplifier. The Leisheng GR-1 headphone amplifier can amplify the volume to more than 200%. Of course, this purpose is too small for the public. It is better to use a professional recorder to record.

To get to the point, the Leisheng GR-1 headphone amplifier, together with medium and high-end HIFI earphones, can better take advantage of the original device advantages of earphones without worrying about the output being greatly reduced due to compatibility and matching problems. The "headphone amplifier" cannot be understood literally as a device to increase the volume inside the headset. It is a device that can effectively reduce the sound effect deviation between high-end headphones and players with poor compatibility.

Therefore, whether you like to collect animation game "Original Sound", enjoy beautiful audio alone, or prefer the unique voice of a singer, you may need the GR-1 headphone amplifier of Laisheng to further improve your high-end audio experience.

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