How to identify high-end power amplifiers?

2024 06/04

Our high-performance power amplifier delivers 1200W per channel at 70.7V, featuring AB hybrid topology for clear sound and robust protection, ideal for professional audio setups. Today we are going to teach you how to choose good performances and differences of class a amp, integrated stereo amplifier and our DSP Amplifier. First, it is aimed at many people who think that the power amplifier is "sinking better and better". Inferior power amplification uses a toroidal transformer, and many use a double-ring cow with fever. However, the quality of this kind of ring-shaped silicon steel sheet is very poor, and the winding process is not enough. It causes low efficiency and low actual power. Especially when the class a amp is quiet, it is easy to hear the ring cows humming.Second, it is a large-capacity domestic capacitor filled with imported brand-name capacitors. Some manufacturers even used a backlog of early capacitors to repackage and refill new capacitors. The actual withstand voltage and capacity of these capacitors simply do not reach the nominal value. These types of capacitors are generally lighter than the true ones.Third, the low-end 4558 or 082 charge 5532 and other high-end DSP amplifier. Sometimes I find that a lot of so-called 5532 is actually 4558 polished. There are also domestically produced power amplifier tubes filled with imported tubes, especially Toshiba tubes with the most fakes.Fourth, integrated stereo amplifier often have 5-channel or even 7-channel output. But in fact, many of the amplifier's surround and center channels are connected by the left and right main channel series resistors. Although some amplifiers have independent amplification circuits, they are only subjected to simple delay processing, and there is no dedicated decoding circuit and sound field processing circuit. When identifying such amplifiers, if you find that the surround and center channels cannot adjust the volume separately, it must be a false surround from the main channel series resistor. If there is a nominal Dolby Pro Logic decoding function and no noise test. Or if the surround speaker rings when only the mono signal is input, the amplifier is a pseudo surround sound amplifier. For amplifiers using technologies such as SRS and Q-Sound, the true and false can also be identified by comparing the audition to turn the surround function on and off and selecting different surround modes. Here, we need to remind everyone that some audio manufacturers have actually adopted the Dolby decoder chip such as M69032, but they have not passed the Dolby certification and also posted the Dolby logo. Such power amplifiers cannot guarantee the necessary performance indicators such as channel separation, and are also counterfeit.Fifth, there is a lack of comprehensive protection functions of . Although the inferior machine has the function of starting and anti-shock protection, most of the necessary over-current, over-voltage and output DC protection functions are omitted. The whole machine is poorly priced, and it is likely to burn expensive speaker units in case of problems. For the identification of such fake methods, one is to check whether the design has perfect protection function by looking at the circuit diagram. The second is short-circuit short-circuit output, if the DSP Amplifier does not appear protection action. It is very likely that these protection circuits have been omitted, at least the tuning is poor.Sixth, it is based on Class B filling, one-sided pursuit of multi-function and appearance while ignoring the level of circuit design, and using this as a selling point. This is all about "advanced" fake tricks. For these "characteristic" amplifiers, if consumers are not familiar with audio equipment, it is best to ask people who know how to help, and try to choose the products of the audio manufacturer.Finally, I would like to offer three suggestions to friends who are ready to buy a power amplifier. First, adhere to the principle of "enough, easy to use", do not excessively pursue function and appearance. For Hi-Fi enthusiasts, a two-element AV amplifier may not be as good as a thousand-dollar dual-channel amplifier. The second is to remember that the amplifier and speakers should be properly matched. The third is to satisfy the principle of your own ears. Don't be fooled by the sound of the "disintegration" specially prepared by the dealers. Bringing a few high-quality CD test machines that you are familiar with may benefit you a lot.

Previous:New Arrival: High - Performance Switching Power Amplifier