Xuanyuan is a cycling enthusiast. Recently, he started the 700 Bike Galaxy City commuter folding bike from Dongge, which has officially become a travel tool for commuting to and from work and for weekend trips. At present, he has accumulated about 500 kilometers. When listening to music on the way to and from work and using Manitobe headphones, he always feels unsafe. He is considering adding a night riding light and a Bluetooth speaker to Galaxy, Unexpectedly, the polar night A5 appeared gorgeous.

The polar night A5 wireless Bluetooth speaker has Bluetooth speakers, plug-in speakers, flashlights FM radio, power bank and other major functions are suitable for several application scenarios such as cycling, outdoor camping, and car driving. The brand was founded in 2014 and is affiliated to Nanjing Sugou Electronics Co., Ltd. It is a new Internet enterprise focusing on computer research and development and sales. It subverts the current situation of traditional computer brand agents layer by layer by relying on the Internet model, from factory shipments to direct users, It greatly reduces the cost and saves the high cost of offline promotion.

PART ONE | Unpacking

The packaging box of the Polar Night A5 is made of paper material, which is soft and slightly thin. In case of violent delivery, I am very worried about the damage of the speaker caused by extrusion deformation. However, it seems that I am too worried about the three prevention properties of the Polar Night A5.

▲ Polar Night A5 box front+small polar meters, large horizon.

▲ On the side of the polar night A5 packaging box, the product is positioned as an outdoor sports Bluetooth speaker.

▲ On the back of the Polar Night A5 packing box, briefly describe the product information and six characteristics.

It is relatively simple to open the box. Speaker * 1, instruction manual * 1, USB charging cable * 1, and no charging head are configured. Considering the popularity of USB charging heads, Xuanyuan's home can have a drawer for large and small chargers and charging heads. At present, many USB charging products adopt the strategy of canceling the charging head, except for special input requirements, such as 5V/3A, 9V/2A, 12V/2A, and so on. One more charging head will also increase the product cost, which will eventually be reflected in the product price and increase the purchase cost of users.

▲ Polar Night A5 adopts blue+black, which is not fashionable, but eye-catching and dynamic.

The polar night A5 is cylindrical in overall design, blue+black in color, which is not fashionable, but is more eye-catching, dynamic and lively, which is more suitable for the application scene of outdoor sports at polar night. The black facing parts at both ends of the fuselage are manual light rings and speakers. As will be introduced below, a large area of blue coated silica gel material is used in the middle of the fuselage to prevent slip, impact buffer, dust Waterproof and other effects, good grip, no hand cutting, the black brand LOGO "TOPFEEL" is more eye-catching, with slots on the top, which is the switch of the speaker AUX、 The charging input port and charging output port have been sealed to prevent water and dust.

▲ The flashlight power switch has three lighting modes, the first is strong light, the second is weak light, and the third is SOS. It is practical and can meet the needs of outdoor passports.

▲ Mode switch button M, volume button and HD microphone of Bluetooth speaker; Long press the mode switch button M to switch between Bluetooth mode, card insertion mode and FM mode. Volume button+short press a song, long press the volume to increase, volume button - short press the previous song, long press the volume to decrease, high-definition microphone can conduct voice input during hands-free call, suitable for a quieter environment.

▲ Large area of anti-skid particles are used on the side of the fuselage to avoid falling by hand.

▲ Some silica gel at the I/O port of the machine body is grooved, but sealed.

▲ Open the slotted cover, which is very flexible to avoid long-term breaking. There are many interfaces inside. From left to right, they are: TF card slot, 5V power bank USB output interface, 5V power input interface, speaker switch key, AUX, etc.

▲ There is an opening on the left side of the bottom of the fuselage, which is the passive membrane resonance horn opening of Polar Night A5, and a fixed nut on the right side, which is convenient for installing the buckle, bicycle bracket, etc.

▲ The periphery of the horn is protected by a black hard shell, and the top surface is made of metal mesh.

▲ The shape of a flashlight lampshade is symmetrical with the shape of the horn shell. Through the protective glass of the toilet, you can see a large LED in the middle of the lamp bowl.

To make a brief summary, the Polar Night A5 is committed to the three prevention speaker, which is suitable for outdoor sports use scenarios, so it has to pay more for waterproof, fall prevention and dust-proof. Through simple open box play, the Polar Night A5 is excellent in workmanship, with the peripheral materials all using ABS plastic and silicone with buffer energy, and the machine body interface has a silicone sealing design, which meets the three prevention requirements, However, Xuanyuan found that the hole at the location of the passive resonant horn is larger, so is there a risk of liquid and dust entering?

PART TWO | Disassembly

Every time I get a new toy, my heart will itch and my hands will itch.

Take the guy~

Disassembly~

The first step is to take off the blue coat of Polar Night A5, so EASY~there is nothing to say.

▲ Polar Night A5 The body of red fruit.

Next, there are four screws in total. What I want to tell you is that there is a warranty label on the screw hole. Tear and release~

▲ Above screw hole Warranty label, Tear and release, one on the left and one on the right.

▲ Remove the fixing screws of two covers at both ends, One on the left and one on the right.

▲ Rotate the horn cover to unscrew the buckle. There is one active alloy horn, 4 Ω 3W.

▲ Pay attention to the waterproof gasket here, and the seal depends on it.

▲ The battery and circuit board are hidden in the body.

▲ Unscrew the lamp cap of the flashlight in the same way, and there is also a waterproof seal ring.

▲ From this angle, you can see the bottom of the battery. Yes, two 18650 cells are connected in parallel, 2 * 2000mAh=4000mAh.

▲ The fuselage consists of two pieces the outer surface It is easy to open with tools.

▲ This is about it.

▲ Look at the cell first, Two 18650 cores are connected in parallel, BX， Bosch Technology does not use a first-line brand cell with 3.7V output.

▲ 1 passive resonance horn, which contributes to the rich bass.

▲ Three fixing screws need to be disassembled for the flashlight lamp head LED lamp board.

▲ High power LED lamp beads, brand unknown.

▲ The circuit board consists of two pieces. The main board is equipped with a master Bluetooth chip, a Bluetooth antenna, an FM antenna, a power management chip, and several interfaces. The secondary board is equipped with switches AUX、 As well as various I/O ports, the main board and the secondary board are in a T-shaped structure. How do you communicate?

▲ Thanks to the pin foot welding on the back, the design is ingenious.

▲ The main Bluetooth chip JL AC1610E is from the domestic chip manufacturer Zhuhai Jieli Technology, and the Bluetooth printed antenna is on the left.

▲FM9908A， The mobile power management chip integrates lithium battery charging management, lithium battery protection, DC-DC boost current limiting, flashlight lighting and power indication, Provide 1A output current, that is to say, the charging bank provides 5V/1A power output.

▲ Black is FM antenna.. The effect is too bad to say.. Worry kills people.. Xuanyuan decided to rebuild it. Due to the limited space inside the fuselage, it considered extending the antenna outside the fuselage.

▲ Pull out along a positioning hole temporarily.

▲ Wear down the blue coat.

▲ Pull it out from the opening of the passive horn.

▲ What is the effect of connecting a magnet to the bicycle bolt? Much better than before!

The summary of disassembly shows that the internal structure of Polar Night A5 has a sealing ring, and the junction of the middle frame wiring has a little glue treatment, The waterproof workmanship is good, the mainboard workmanship is orderly arranged, and the independent power management chip is used, which has multiple protections, including load overcurrent, anti backflow during charging, short circuit protection, lithium battery over discharge protection, etc. By using cost-effective components to select materials, the price competitiveness of the product is guaranteed, but the FM antenna effect is very poor, There were no channels before the transformation. After the transformation, the effect is much better. You can receive 3~5 channels in the room, and the sound quality is good.

PART THREE | Experience

At midnight, a fastener accessory was randomly delivered, which can be hung on the outsourcing and belt when going out. Unfortunately, the bicycle fixed bracket was not delivered, and it didn't cost much. I bought one online, but it hasn't been delivered, so I can't install it on the bicycle for the time being, so I will take the fixed base of the tachograph for demonstration, thanks to the universal thread interface, ha ha~perfect fit.

▲ DASH CAM BASE+Polar Night A5

▲ DASH CAM BASE+Polar Night A5

▲ DASH CAM BASE+Polar Night A5

First, let's experience the performance of the flashlight of the Polar Night A5. The official propaganda says that the Polar Night A5 uses imported LED bulbs with a 500 meter super high beam distance. It is unknown whether the actual distance is 500 meters. But from the actual brightness experience indoors and outdoors, I can only say that the performance of the Polar Night A5 is enough for daily life. It is recommended not to directly shoot into the eyes, especially at outdoor nights, Xuanyuan looks at his eyes in this way, dazzling, and then doesn't recover for a long time....

▲ Polar Night A5 flashlight effect

▲ Extreme night A5 flashlight effect - indoor lighting effect

▲ Extreme night A5 flashlight effect - indoor light off effect

▲ First gear strong light effect - outdoor

▲ Low light effect of second gear - outdoor

Now let's experience the effect of Bluetooth speakers. Turn on the power switch of the speakers, that is, turn the switch from OFF to ON, and the polar night speakers will automatically turn on to start the wireless Bluetooth mode. At this time, you need to turn on the Bluetooth switches of mobile phones and tablets, search for "TOPFEEL A5", and the sound source will automatically switch to the polar night A5 speakers, The Polar Night A5 uses a 3W alloy speaker+a passive resonant speaker, adopts dual power bass enhancement technology, and the principle of automatic low-frequency tracking compensation. It is dedicated to the high sound cool, the Bank of China powerful, and the bass full. As for this passive resonant speaker, we will see it in the disassembly link below.

▲ Polar Night A5 Bluetooth connected mobile phone plays music

In the actual music playing session, through listening to Cui Jian's Let Me Play Wild on the Snow, Pu Shu's Ordinary Road, Xie Tianxiao's Please Forgive Me, and May Tian's Midsummer Light Year, I personally felt that the sound quality of A5 was good, especially in the bass, which was full of dynamic and deep, thanks to the passive unit at the bottom of the speaker, In the enclosed box space formed by the middle frame and the lower cover of the speaker, the passive unit resonates and passively emits sound driven by the air in the box by the active unit, making the bass more powerful and creating a very strong wide range. The personal feeling of the middle and high tones is average, without highlights or slots. What kind of top sound effects do you want for such a portable speaker, That's because you think too much.

FM The disassembly link above has been introduced, so I won't say much here.

PART FOUR | Summary

Through one week's experience of polar night A5, I really like this flashlight+Bluetooth speaker. Because it is small and portable, anti falling and waterproof, and has the characteristics of music playing and lighting, in addition to the use of outdoor sports, it is very practical in daily life. I put it in my bag to make a temporary charging bag, take my son out to touch after dinner, play bedtime stories Simple lighting at night, etc., is a portable electronic product with rich functions, diverse use scenarios, waterproof, dust-proof, and fall proof. The official price is 99 yuan, and the cost performance ratio is high. It is worth recommending to friends.

▲ I accompanied my son to catch a cicada last night, but I caught a bullock.

advantage:

1. Rich functions, such as Bluetooth speaker, plug-in speaker, flashlight, FM radio, power bank, etc

2. Small and portable, With three prevention performance, Various usage scenarios ；

Insufficient:

1. FM antenna effect is too poor;

2. After the Bluetooth switch is turned on, it seems that the system will not sleep automatically when it is not connected;