With the wide application of HDMI cables, HDMI cables have entered thousands of households. However, when many users buy HDMI cables, they are often confused when faced with many brands of HDMI cables in the market, and they do not know which one to choose. As a practitioner and professional manufacturer of HDMI cables, let's talk about how to choose a high-quality HDMI cable.
First of all, let us understand the harm of inferior HDMI cables:
The HDMI cable is used as the connection link between the playback device and the display device, and its quality directly affects the display effect of the TV, projector or monitor. A high-quality HDMI cable can form a "fast transmission channel" between the input device and the display device, so that there is no interference in the transmission of data information, which greatly improves the user's audio-visual experience. Inferior HDMI cables are prone to corner ghosting, color cast, water ripples and other phenomena on the display interface, and the display parameters that should be automatically recognized cannot be recognized. Most of those HDMI cables that cut corners have only 13 or 15 cores, and may remove the necessary shielding layer, which has a great impact on the signal quality, and is prone to flickering, snowflakes, black screen, desaturated color, poor sound quality, etc. etc. phenomenon. Moreover, the interface of the HDMI cable with poor workmanship is also prone to electrical performance problems such as poor contact or short circuit. Especially long-distance HDMI cables used for buried walls are very easy to affect signal transmission due to quality problems. If you accidentally use inferior HDMI cables, you will regret it.
After recognizing the harm of inferior HDMI cables, let's learn together: how to buy HDMI cables?
1. From the perspective of the enterprise to examine:
1>Know the approximate size of the business:
We all know that the production of HDMI cables is a high-standard craftsman's work. Only with advanced equipment, as well as mastering the core technology and advanced craftsmanship, can we provide customers with perfect and high-quality products. Therefore, you can first check whether the target enterprise attaches great importance to the investment in talents and equipment. Only with high-quality professional and technical personnel and advanced high-tech equipment can we have strong technical force and rich production experience! Regular HDMI high-definition cable manufacturers generally have independent production lines, complete wire drawing equipment, welding equipment, testing equipment, etc., and will also set up product research and development teams, with efficient product research and development capabilities, semi-finished product production capacity, and finished product production capacity.
2>Whether the company is certified by the HDMI Association
According to the standards of the International HDMI Association, only companies approved by the HDMI Association members can print the HDMI logo on their products, and are allowed to produce and sell HDMI cables. Generally, certified companies represent that the company has technically reached the standards set by the international HDMI organization. , so when purchasing HDMI cables, it is very important to choose a company certified by the HDMI Association!
3>Corporate culture, service concept
High-quality enterprises will attach great importance to the concept of corporate culture. An enterprise with a good corporate culture and service concept is the basis for providing users with satisfactory products! For example: Shenzhen Shuntiancheng Electronic Co., LTD, a manufacturer of HDMI cables for 20 years, has been adhering to the cooperation concept of "integrity, professionalism, and win-win", insisting on the work attitude of pursuing excellence, excellence, and innovation, and insisting on small profits but quick turnover and large quantities. The sales principle that quantity is superior, do our best to provide customers with satisfactory products and services! The company promises: any high-definition cable purchased in our factory will be guaranteed for three years, and it will be replaced if there is any problem! When an enterprise has such a commitment, it is naturally easy to gain the trust of users and give priority to cooperation objects!
2. Distinguish from the product itself:
1>Look at the inner core material to distinguish the inner core material of HDMI cables:
A oxygen-free copper wire, B recycled copper (low copper content), D copper clad steel, C copper clad iron. The standard HDMI cable is generally made of high-purity unsampled copper. Non-standard products are generally made of cheap copper-clad steel, or even copper-clad iron, whose transmission performance is far inferior to pure copper core wires, and even cannot achieve 1080P signal transmission effect, which cannot guarantee high-quality signal transmission at all.
2>See the number of cores
Positive standard HDMI cable: full PIN 19+1 cores, a total of 20 cores, in line with HDMI Association standards.
Non-standard HDMI cable: cut corners, remove the ground wire, usually made into 13+1 core or 15+1 core. At present, the non-standard HDMI cables on the market generally have 4 shielded cables and 2 functional cables less than the standard version, which greatly reduces the signal transmission effect.
3>see shielding material
The standard HDMI outer quilt is very strong in pvc, and it is more laborious to disassemble. Generally, it cannot be torn by hand. It can only be cut with scissors and pliers, while the outer quilt made of secondary waste can be cut with light force. Tear by hand. After cutting the first layer of PVC shielding layer, you can see that there is a layer of high-density and very strong metal aluminum-magnesium shielding layer, which can only be cut with scissors and pliers. The third layer is the aluminum foil shielding layer, and the core is 125%. The aluminum foil wrapping has a stronger shielding effect, and the formation of multi-layer shielding can effectively resist interference and make signal transmission more stable. The non-standard HDMI cable has no shielding layer, which cannot block the interference of the external environment on the normal transmission of the signal.
4>Look at the HDMI cable connector and PIN pin
If the connector of the HDMI cable is a gold-plated connector, in addition to being more beautiful, the gold-plated connector has strong corrosion, good conductivity, easy welding, high temperature resistance, and certain wear resistance. Therefore, gold-plated joints are better than non-gold-plated joints. The general gold-plated joints on the market are 24K gold-plated, with higher brightness. It is not that the gold-plated HDMI connector will definitely bring high-definition picture quality. The final contact with the HDMI interface of the device is the PIN pin in the connector of the HDMI cable, so the conductivity and wear resistance of the PIN pin are very important. The material of the PIN needle is generally tin bronze, which has high elasticity, excellent wear resistance and corrosion resistance. Generally, the PIN pin is plated with nickel on the tin bronze, and then it is easily plated with gold, so the PIN pin of the HDMI cable with good workmanship can observe three layers.
5>Check out the functional test results
High-quality HDMI cable: In line with the standards set by the HDMI Association, it can complete the transmission mission with high quality, and can perfectly restore the essence of audio and video, making the image more vivid and the color richer. So as to fully demonstrate the technical advantages of HDMI. Poor quality HDMI cable: The color difference or insufficient bandwidth causes unstable playback, and is prone to poor contact, poor hang interference ability, etc., resulting in flickering of the displayed image, poor effect, black screen and other phenomena.
6>Look at the wire thickness
Under normal circumstances, the larger the wire diameter of the HDMI cable, the larger the cross-sectional area of the conductor, and the greater the current can be transmitted, which ultimately shows that the HDMI cable has good and stable transmission performance. However, some inferior wires will also be filled with debris to increase the wire diameter, making people look thick, so it is not that the thicker the wire, the better. When buying HDMI cables, you should be especially careful of such inferior products that "swell your face and fill your face with fat".
7>Choose a Metal Grip or a Plastic Grip?
In fact, in terms of the final image quality of the HDMI cable, there is no difference between the metal handle and the plastic handle, but the HDMI cable with a metal head looks higher-end, stronger and more beautiful, and the cost of the metal head is relatively high. some. So in this regard, as long as the choice is based on personal preference.
8>Choose flat wire or round wire?
In terms of bending, the round wire has such a large resistance to bending force in any direction. The flat wire has two directions with low bending resistance, and the other two directions cannot be bent. The round wire is more convenient to use, saves space, is easy to embed and install around the wall, is not easy to knot, and is easier to pass through the PVC pipe. In terms of internal structure, several twisted pairs of round wires are tightly wound together, while flat wires are arranged in parallel. Relatively speaking, round wires have stronger anti-interference performance and transmission effect. But in an environment with less interference and less distance, there is almost no big difference between the two.
9>Look at the wire gauge AWG value
Generally, the standard HDMI cable uses the 28th or 30th wire, and the diameter of the good wire is the larger 24th or 22nd wire, because the thicker the inner core conductor of the wire, when transmitting high-frequency signals, The signal attenuation will be less. Simply put, in the same brand and the same length of wire, the smaller the AWG value of the wire gauge used, the better the transmission effect of the wire will naturally be.
10>Version difference
The HDMI cable version on the market has developed from version 1.3, version 1.4, version 2.0 to the latest HDMI version 2.1. With each new version, the bandwidth will be greatly improved, and it can be backward compatible. At present, the bandwidth of the HDMI 2.0 version, the HDMI 2.0 specification supports a maximum transmission bandwidth of 18Gbps, which is much larger than the previous version, and this is achieved without users needing to purchase a new cable separately. By optimizing the transmission signal, it can transmit faster video without loss in the same cable. Now it is appropriate to choose the cable considering version 2.0.
Through the above points, you can basically judge the quality of an HDMI cable. If individual users want to know more about HDMI, they can pay attention to our related posts (Why should the inner core conductor of HDMI cable use oxygen-free copper?) . Finally, I wish you all: In life, find a good partner for yourself, and in life, provide a good HDMI cable for your audio and video equipment!
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Post time: Oct-20-2022