New Year's Gift for Family 4: Give yourself - How can I stop me from doing this? - Yuein POP-M

Saying that since the purchase of Yuein POP (single tan), this fat is in a state of semi-firing, and little attention has been paid to earphone earphones. But a few days ago, I suddenly heard that POP launched a new product, POP-M. At this time, at the end of the year, this fat man is holding a performance salary that is still hot at the end of the year.

POP-M is a four-unit dual-duct earbuds, priced at 2980, is obviously ready to give up the cost of the big brother POP. However, past experience shows that in addition to LOGO, other aspects of Yuein are conscience, so the greater possibility is not a turning point in the vendor sales strategy, but POP-M has a performance beyond the number of units.

Pop M's initial pre-sale POP-M purchase page direct link

However, the most exciting thing is the reflection of the abalone shell in the official picture. As the saying goes, I must remember that my POP has missed the abalone panel. If I can get it on POP-M, it can also be regarded as a loss.

Although Yuein officials claim that POP-M is a "non-custom in-ear earphone," from the point of view of the customizable panel and cavity services, I think it is more appropriate to call POP-M a male model. Having said that, although the units and cavities can be customized, the toxicity of the official propaganda pictures is too great, so this fat man will no longer work hard on the selection and matching, and it would be just as good as an official picture.

Do not talk nonsense, open the sun below.

In general, the packaging of POP-M is basically the same as the pictures provided by the government, and there will be no buyer issues. The whole package is simple and compact - at least more compact than the QC30 I bought for my wife.

The whole package is the structure of the lower iron sheet on the bamboo sheet. The bamboo sheet is smooth and polished, and there are no traces at the joints. The iron sheet is sandblasted and the joints and interfaces are relatively perfect. The four sides of the bamboo sheet are embedded with four magnets. It is fixed with the box. Compared to POP's shabby carton packs, the lower-priced POP-M has better packaging. This at least shows that Yuein has done more research in the entire supply chain, rather than focusing on earbud production. Small workshop.

Opening the bamboo lid is a product manual (which looks a bit jocular) and a POP-M carrying case. Although the box occupies more space than the POP random holster (of course, this portable box is also small enough, refer to the picture of the aluminum handle model), but the protection of earplugs is more in place. One side of the carrying case has an interface that is easy to hang. Although this design may not be able to be used effectively, it can still realize the carefulness of the manufacturers.

Overall, however, the workmanship of the carrying case is a bit rough: the plastic parts have obvious traces of the injection ports and the hinges are less refined. In particular, there are still some gaps compared with the already perfect packaging.

Open the portable box is the body of the POP-M ear plug.

The earplug cavity has a very high degree of completion, a sleek design, and it is not known where it is higher than the westone and shure of the year. Especially the abalone shell at the outer panel not only makes the color bright, but also has no external panel. Stitching traces, but...

Why did you use the abalone shell to spell out this ugly explosion LOGO? Notice that this slingshot LOGO is Yuein's big black spot. I feel like writing a M is much better than this.

The next part is to talk about the catheter part. According to official propaganda, the POP-M uses a “Dual Unequal Mixing Conduit”. For a four-unit earbud product, the catheter may be its real selling point.

The POP-M's catheter is rather thick and not the traditional right cylinder, but rather the taste of a custom earbud catheter (although claims to be non-custom). In addition, as can be seen from the above two pictures, there are differences in the inner diameter and the material of the catheter. Slightly thicker is the silicone tube, and the slightly thinner one is the metal tube. According to internal news, the silicone tube is connected to the mid-range unit, and the metal tube is connected to the bass unit, which has miraculous effects in terms of tuning.

Uncalibrated hybrid catheters are even more advanced than non-calibrating catheters used on POPs, but I would also like to commend Yuein for his considerable advancement in the management of cavity space. They use curved catheters and stepped cavities to shape them even more. The flat woofer, the smaller mid-range unit and the flying line are arranged separately, so that the cavity space is greatly compressed, and can be easily inserted into the cavities, greatly improving the wearing comfort.

Comparing POP and POP-M, it is not difficult to find that the new product is reduced in size. However, it is important to note that the sounding unit actually has only two small high frequency units, so this definitely indicates an increase in the manufacturing process. It is thought that in the future, Yuein's customization (not knowing or not calling POP) will also absorb this experience and further reduce the cavity with the same number of units. (or further stack the unit in the same volume)

The other accessories of the POP-M are quite satisfactory: four soundproof sets (3 silicone + Comply), twisted pair cable with track control and microphone.

Although this headphone cord is slightly slumped at the Y connection, the stereotyped wire at the mounting bracket is softer than the POP cord, so it is more comfortable to wear. If it is not the ultimate pursuit of sound quality, I do not need to consider changing the line of things.

After talking about the external part, let's talk about the most important voice of POP-M.

In a word, to sum up, the voice of POP-M and the voice of Big Brother POP are all good at winning the game. The overall view is not because of the small number of units. If the POP-M has the deepest impression, it should be the earplug's superior midrange and low-frequency resolution.

First of all, from the low-frequency aspect, in fact, the low-frequency feel of the male model earplug is largely determined by the soundproof sleeve—for example, compared with the silicone sleeve, the C sleeve can improve the low-frequency feeling greatly, so the most in this part Do not talk about low-frequency sense.

POP-M's low-frequency dive is basically the same as POP, but it is even more neat. This kind of neatness is not usually called "tightening" of a moving iron unit, but is a feeling of freedom and convenience, which helps to improve music. The bass part of the resolution. This may be the result of the metal conduit. If the fat man is irresponsible to guess, the metal duct is more rigid than the silicone/polymer duct, which can suppress the resonance phenomenon caused by low frequency passage. Although I do not want to admit it, I still have to say that the low-frequency part is slightly better than POP-M.

It should also be noted that although POP-M low-frequency more neat, but excessive low-frequency will certainly cover up the music information of the intermediate frequency, which is the so-called "masking effect", not to the will of people, so if you want to feel better POP The resolution of -M is recommended to use a silicone sleeve as much as possible when the noise insulation requirement is not too high.

The next big book that deserves special mention is the POP-M midrange. Although POP has set a high standard on the midrange, POP-M has succeeded in another way, providing another sound that is equally impressive but completely different from POP.

POP can provide information on the vocal resonance chamber and vocal cords in the IF area. Compared with the POP-M, it increases the performance in the 1000-2000 Hz range. The vocal resonance information is weakened, but the vocal cords are greatly enhanced. In this way, the singer's illusion that the reverberation caused the sound to be cleared (such as a golden needle winner) will be ruthlessly exposed. Whose voice is false, and whose voice is good (or whose vocal cord is It's nice), you can tell in one ear.

The change in the POP-M midrange frequency is not visible in appearance, so it should not be caused by new materials, so it is expected that the circuit should be adjusted.

In fact, from the mid-frequency point of view, the DEMO version of POP is undoubtedly the most sweet, followed by POP, while the POP-M IF is the roughest (or texture). If the female singer's voice is used as a metaphor, the demo version of POP is Teresa Teng, the official POP version is Faye Wong, and the POP-M estimate is Tian Zhen.

This type of medium frequency, known for its resolution, is too cruel for some singers (such as Fish), but it is simply tailored to certain types of music.

Yes, it is rock.

As a middle-aged rocker who likes high-resolution modern sounds, using POP-M to listen to rock, each subtle place is not an outsider, although he can't reach the level where the short and tight dwarf teacher eats Kaiseki and eats it. But also not far away. For example, this one -

Black Panther Band: Black Panther (CD) 32 Yuan POP-M Perfect Match Jingdong Direct Link

I specifically asked UU about this, why didn't we simply call Rock and got a name called POP-M? It really made me tangled up a lot at the time of purchase. I didn't think about calling Rock inside, but I thought about it. To product naming consistency and follow-up product release, so still named after POP.

Well, stop here for this paragraph, or have suspected gunmen.

Let's talk about high frequencies. The high frequency of POP-M seems to be a relatively poor link at present, and there is a big gap with POP. The most significant gap is reflected in the timbre of the instrument. POP has a special high-frequency unit responsible for high-frequency playback. Therefore, the interpretation of the string is in place. No matter if it is a guitar or a violin, it can still exceed the level of chamber music. Competent; but POP-M's high frequency is relatively rough, although there is no problem in positioning, the proportion of reverberation is correct, and the tooth sound is not serious, but the sound of the instrument is relatively dry, lacking a hint of extravagance, and the moving iron taste is quite obvious. of.

From the triple frequency point of view, although POP is named POP, but basically can be heard from the rock of classical music, POP-M is more suitable for listening to rock and pop music, I have to listen to classical music, I think it should not exceed Opera category - listen and sing just fine, instrumental music or do not do too much hope unless brass.

Finally, talk about the promotion of the issue, POP-M may be slightly higher than the previous paragraph requirements POP. For POP, even if the iPhone is used, the front part with insufficient thrust quality will not produce bad sound; however, for POP-M, if the driving is not good, the high frequency problem may be further magnified. Causes the sense of hearing to be dry. It is recommended to use iPad or advanced advanced playback to ensure that the high frequency is relatively moist to obtain good playback results.

Of course, the above problems are also relatively speaking, compared to the K3003, which is difficult to drive perfect, regardless of POP, or POP-M, are considered to be a good example of good service.

Overall, this thing is quite my heart. Among these four gifts, it may be the only New Year gift that the recipients are satisfied with. At least one-fourth of the probability of success is also my hand is not white.

As of this writing, the “New Year's Gift for the Family” series is even the end of the bird. I hope that you will pay attention to your family and family during the Year of the Rooster, and pay attention to your own body while paying attention to your work. Finally, I wish you all good friends for a good year!

Surge Protection Device SPD

Product Description

SPD Surge Protective Device,Lightning Surge Protector
Surge Protection Device (SPD)

It is a device used to limiting instant surge voltage and discharge surge current, it at least including a non-linear component.

Surge protective Device Model Selection

With the impact of international information flow, the rapid development of microelectronic science and technology, communication, computer and automatic control technology, make the building start to go for high quality, high functional area, formed a new building style-intelligent building. As inside the intelligent building there are lot of information system, <<Building lightning protection design norm>> GB50057-94(2002 vision)(hereafter brief as <<lightning protection norm>>) put forward the relative requirement to install the surge protective device, to ensure the information system safely and stable running.
SPD essentially is a equipotential connection material, its model selection is according to the different lightning protection area, different lightning electromagnetic pulse critical and different equipotential connection position, decide which kind of SPD used in the area, to achieve the equipotential connection with the common earth electrode. Our statement will based on SPD's maximum discharge current Imax, continuous operating voltage Uc, protection voltage Up, alarm mode etc.
As per << Lightning Protection Norm>> item 6.4.4 stipulation "SPD must can withstand the expected lightning current flow and should confirm to the additional two requirements: the maximum clamp voltage during surge across, capable to extinguish the power frequency follow-on current after lightning current across." That is the value of SPD's max. clamp voltage add its induction voltage of two ends should be same with the system's basic insulation level and the equipment allowed max. surge voltage.

SPD for Power Supply System Series Selection Guide

The installation of SPD at each lightning protection zone, according to the standard of low voltage electrical appearance, make classification of electrical equipment in accordance with the over voltage category, its insulation withstand impulse voltage level can determine the selection of SPD. According to the standard of low voltage electrical appearance, make classification of electrical equipment in accordance with the over voltage category as signal level, loading level, distribution and control level, power supply level. Its insulation withstand impulse voltage level are:1500V,2500V,4000V,6000V. As per to the protected equipment installation position different and the different lightning current of different lightning protection zone, to determine the installation position of SPD for power supply and the break-over capacity.
The installation distance between each level SPD should not more than 10m, the distance between SPD and protected equipment should as short as possible, not more than 10m. If due to limitation of installation position, can't guarantee the installation distance, then need to install decoupling component between each level SPD, make the after class SPD can be protected by the prior class SPD. In the low voltage power supply system, connecting an inductor can achieve the decoupling purpose.
SPD for power supply system specification selection principle
Max. continuous operating voltage: bigger than protected equipment, the system's max. continuous operating voltage.
TT System: Uc≥1.55Uo (Uo is low voltage system to null line voltage)
TN System: Uc≥1.15Uo
IT System: Uc≥1.15Uo(Uo is low voltage system to line voltage)
Voltage Protection Level: less than the insulation withstand impulse voltage of protected equipment
Rated discharge current: determined as per to the lightning situation of the position installed and lightning protection zone.
SP1 Series

Normal Working Conditions
-Altitude not exceed 2000m
-Ambient air temperature:
Normal range: -5ºC~+40ºC
Extend range: -40ºC~+80ºC
-Relative Humidity: 30% - 90% under indoor temperature condition
- At the place without obviously shaking and shock vibration
- Non-explosion danger medium, non-corrosion gas and dust ( including conductive dust)

Classification

-As per Nominal Discharge Current:
5,10,20,30,40,60KA(8/20µs)
- As per Maximum continuous operating voltage:
275V,320V,385V,420V,440V,460V
- As per to poles
1P,1P+N,2P,3P,3P+N,4P
- As per auxiliary functions:
a. With remote signal output ( remote alarm function)
b. Without remote signal output

Selection Principle

- The continuous applied voltage on the two terminals of SPD should not more than the maximum continuous operating voltage Uc value;
- The voltage protection level Up of SPD should less than the maximum impulse withstand voltage of the protected equipment;
- As per to the different earthing system and protection mode to select the specification accordingly;

Product Features

1, built-in over-current overheating, temperature control circuit technology.

2, the module design, easy installation, online replacement.

3, low leakage current, fast response time, low residual voltage.

4, alarm indication device, green (normal) v red (fault).

Model/Technical Parameters	WR-B60	WR-B80	WR-B100	WR-B120	WR-B150
Rated Operating Voltage Un (V ~)	220V 380V	220V 380V	220V 380V	220V 380V	220V 380V
Maximum Continuous Operating Voltage Uc (V ~) kV	385V 420V	385V 420V	385V 420V	385V 420V	385V 420V
Voltage Protection Level Up (V ~) kV	≤1.8≤2.2	≤2.4≤2.5	≤2.5≤3.2	≤3.4≤3.7	≤4.0≤4.5
Maximum Discharge Current Imax(8/μ20μs)kA	60	80	100	120	150
Nominal Discharge Current In(8/μ20μs)kA	30	40	60	80	100
Response Time	<25			<100
L/N(mm²)The Cross Section Of L/N Line	16,25	16,25	16,25	16,25	25,35
PE (mm²)The Cross Section Of PE Line	16,25	25,35	25,35	25,35	35
Fuse or Switch (A)	63A	63A	63A,100A	63A,100A	63A,125A
The Line Section of Communication and Alarm (mm²)	≥ 1.5
Operating Environment-C	(-40ºC~-+85ºC)
Relative humidity 25 ºC	≤95%
installation	Standard Rail35mm
Material of Outer Covering	Fiber Glass Reinforced Plastic

Surge Protector SPD,Surge Protection Device SPD,SPD

Wenzhou Korlen Electric Appliances Co., Ltd. , https://www.zjmotorstarter.com