Audio amplifiers are at the very heart of every home theater system. As the quality and output power requirements of today’s loudspeakers increase, so do the demands of audio amps. It is hard to pick an amplifier due to the great number of models and styles. I will explain some of the most common amplifier designs including “tube amps”, “linear amps”, “class-AB” and “class-D” as well as “class-T amps” to help you understand some of the terms commonly used by amplifier manufacturers. The following information also needs to assist you to figure out which topology is ideal for your particular application.

To put it simply, the goal of Cayin Audio would be to convert a low-power audio signal in to a high-power audio signal. The high-power signal is big enough to operate a speaker sufficiently loud. In order to do that, an amp uses one or more elements which are controlled through the low-power signal to generate a sizable-power signal. These components range from tubes, bipolar transistors to FET transistors.

Tube amplifiers used to be common a few decades ago. A tube is able to control the current flow in accordance with a control voltage that is attached to the tube. Unfortunately, tube amplifiers possess a fairly high level of distortion. From a technical perspective, tube amplifiers will introduce higher harmonics into the signal. However, this sign of tube amps still makes these popular. Many individuals describe tube amps as having a warm sound versus the cold sound of solid state amps.

Another problem with tube amps, though, is definitely the low power efficiency. The majority of power which tube amps consume is being dissipated as heat and just a fraction will be converted into audio power. Also, tubes are very costly to make. Thus tube amps have mostly been replaced by solid-state amps which I will appear at next.

Solid state amps replace the tube with semiconductor elements, typically bipolar transistors or FETs. The earliest type of solid-state amps is known as class-A amps. In class-A amps a transistor controls the existing flow in accordance with a tiny-level signal. Some amps utilize a feedback mechanism in order to minimize the harmonic distortion. Class-A amps have the lowest distortion and in most cases even the lowest level of noise of the amplifier architecture. If you need ultra-low distortion then you should take a closer look at class-A models. The primary drawback is the fact that comparable to tube amps class A amps have really low efficiency. Because of this these amps require large heat sinks to dissipate the wasted energy and therefore are usually fairly bulky.

Class-AB amps improve on the efficiency of Speaker Cable. They utilize several transistors to interrupt up the large-level signals into two separate areas, every one of which is often amplified better. As a result, class-AB amps are usually smaller than class-A amps. However, this topology adds some non-linearity or distortion in the region in which the signal switches between those areas. Therefore class-AB amps normally have higher distortion than class-A amps.

Class-D amps improve on the efficiency of class-AB amps even further simply by using a switching transistor which can be constantly being switched on or off. Thereby this switching stage hardly dissipates any power and phczif the ability efficiency of class-D amps usually exceeds 90%. The switching transistor has been controlled by a pulse-width modulator. The switched large-level signal has to be lowpass filtered in order to remove the switching signal and recover the audio signal. Because of non-linearities of the pulse-width modulator and also the switching transistor itself, class-D amps naturally have amongst the highest audio distortion of any audio amplifier.

To fix the issue of high audio distortion, newer Line Magnetic incorporate feedback. The amplified signal is compared with the initial low-level signal and errors are corrected. A properly-known architecture which uses this type of feedback is known as “class-T”. Class-T amps or “t amps” achieve audio distortion which compares with the audio distortion of class-A amps while in the same.

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