With the popularity of smart phones, people can't do anything without mobile phones, such as watching videos, listening to music, chatting, and making phone calls. However, many people still feel uncomfortable listening to music on their mobile phones. The sound is not mellow enough, and the sense of level is not strong enough. Why? Because you are missing a "unrelenting call"!

The full name of "Buyu Laisheng" is Shenzhen Buyu Laisheng Technology Co., Ltd. Recently, a portable headphone amplifier, GR-1, was introduced. All metal body, concave convex uneven shell looks very handsome and stylish.

Listen to your voice! This ad is interesting. Listen attentively to the ultimate music experience, and you need to savor it through persistent solicitation!

Specific features:

The classic flagship operational amplifier chip OPA2604 of Sanli TI is used to form the OP+BUF circuit, which has low distortion, low noise, large output dynamic and large thrust

The power supply circuit uses two TI special power chips to provide ± 7.5V dual power supply to the operational amplifier chip, greatly improving the output dynamic range.

The famous Japanese ELNA filter capacitor is used as the filter capacitor to effectively reduce the power ripple and make the circuit music background more pure and quiet

The power switch is a two-way switch of the famous ALPS brand. The switch has no noise, stable performance and a service life of more than 10000 times.  

Two EVOX 1UF coupling capacitors and two 0.1uF bypass capacitors are used to make the voice more sweet.

With a specially customized volume potentiometer, the rotation noise is small and the distortion is small.

The headphone holder with all metal shell can effectively shield external noise interference.

The shell is made of titanium alloy, fashionable and personalized, with excellent anti-interference ability.

In the package, there are not only Laisheng GR-1 host and accessories, but also a personalized Laisheng metal label. It can be seen that this enterprise still attaches great importance to its brand promotion awareness. This super textured metal logo is worth collecting and playing with.

Black cool instructions, gorgeous Laisheng metal label, GR-1 host, AUX connection cable and USB charging cable. Leisheng also comes with a strap that can bind the headphone amplifier and the playback device together for easy carrying.

The instruction manual is also made into a ladder shape, with more content on each layer. First, it explains the basic connection and usage of the earphone, and the last page is made into a quality assurance card. Quite creative!

The workmanship of GR-1 is very exquisite. Just holding it in your hand is a feeling of love. It is small and delicate. You may even feel it deformed when holding it in your hand.

The interface and switch are basically integrated on the top of GR-1, one 3.5mm inlet and one 3.5mm outlet, the middle position is the toggle switch and power indicator, and the knob on the extreme side is used to control the volume. It is quite intuitive and understandable.

The reserved interface at the bottom is the USB port for charging GR-1. A charging indicator light is also designed on the side.

The built-in 3.5mm pair recorder is used to link the mobile phone. The material and workmanship of the wire are also quite good, which is very sturdy. It can reduce interference in audio transmission and improve audio quality.

The GR-1 can be tied to the mobile phone with its own strap, so it is more convenient to listen to songs outside. But now most smart phones are touch screens. After being tied, there is really no good position to make way of the touch screen, which does not affect the screen control of the phone. This is really a disadvantage. The designer needs to think again.

After listening to some music carefully through GR-1, I felt that it really had an obvious effect on the amplification of music, especially those earplugs that were difficult to push. Previously, direct listening with mobile phones did not have much resolution and thrust. With the addition of GR-1, the voice becomes louder, and the level of melody is strengthened.

According to the different headphones connected, the volume adjustment is also a little particular. This can be adjusted freely depending on the outdoor environment and your ear's sense of hearing, GR-1

The bass of earplugs is sufficient, which makes up for the problem of insufficient bass of earplugs.

By listening to some music of different styles, you can also personally feel that GR-1 has a good thrust. As long as you listen carefully, you can hear the different musical instrument combinations with grand sound effects and orderly levels. The sound of drums, guitars, and pianos has become melodious and full of jumping power!!

Not only listening to English songs is pleasant, but also listening to Mandarin songs has made great progress. High frequency melodious sound is not distorted and harsh, full and energetic. The medium frequency is mellow, especially when you wear a large headphone that has no feeling of insufficient thrust. It makes up for a lot of very good headphones that cannot be pushed directly by your mobile phone, giving many listeners who love listening to music on their mobile phones new discoveries and feelings. Some good music really has a different feeling when you taste it carefully with GR-1.

As a portable headphone amplifier, it can easily push earplugs and wear headphones. It is also very good to use it to push the audio to listen to songs. After trying different styles of music, GR-1 can still play a good audio like push the bird. If you play it directly on your mobile phone, you will feel that the push is obviously insufficient, and the sound is not very good. With the headphone amplifier, it is completely different. The dynamic sense of activity can be clearly felt. The bass has also been supplemented!

GR-1 headphone amplifier has a good appearance design. It uses three TI's classic flagship operational amplifier chip OPA2604 to form the OP+BUF circuit, which has low distortion, low noise, large output dynamics and large thrust. It can not only be used to push small earplugs and headphones, but also can be used to push general audio.

Its disadvantages are also obvious, and the binding application of smart large screen mobile phones is not considered. After the headphone amplifier is tied up with the mobile phone, the mobile phone cannot be operated. The 3.5mm interface is not very compatible with some mobile phones with microphones. Some earphones connect GR-1 and feel echo and noise in a completely quiet environment.

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