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 tough to pick an amplifier given the multitude of models and fashions. I will explain probably the most common amplifier designs including “tube amps”, “linear amps”, “class-AB” and “class-D” along with “class-T amps” to help you understand some of the terms frequently used by amplifier manufacturers. This informative guide should also assist you to discover which topology is perfect for your particular application.
In other words, the purpose of Cayin Audio is always to convert a small-power audio signal right into a high-power audio signal. Our prime-power signal is big enough to drive a speaker sufficiently loud. In order to do that, an amp uses several elements which can be controlled through the low-power signal to create a large-power signal. These factors range between tubes, bipolar transistors to FET transistors.
Tube amplifiers was once common a couple of decades ago. A tube has the capacity to control the present flow according to a control voltage that is linked to the tube. Unfortunately, tube amplifiers use a fairly high amount of distortion. From a technical perspective, tube amplifiers will introduce higher harmonics into the signal. However, this manifestation of tube amps still makes these popular. Many people describe tube amps as possessing a warm sound versus the cold sound of solid state amps.
Another problem with tube amps, though, will be the low power efficiency. Nearly all power which tube amps consume will be dissipated as heat and just a fraction has been changed into audio power. Also, tubes are quite costly to make. Thus tube amps have mostly been replaced by solid-state amps that i will look at next.
Solid state amps replace the tube with semiconductor elements, typically bipolar transistors or FETs. The earliest kind of solid-state amps is referred to as class-A amps. In class-A amps a transistor controls the existing flow based on a little-level signal. Some amps make use of a feedback mechanism so that you can minimize the harmonic distortion. Class-A amps hold the lowest distortion and in most cases also the lowest level of noise of the amplifier architecture. If you want ultra-low distortion then you definitely should take a close look at class-A models. The main drawback is the fact comparable to tube amps class A amps have really low efficiency. Consequently these amps require large heat sinks to dissipate the wasted energy and they are usually fairly bulky.
Class-AB amps improve on the efficiency of CopperColour Cable. They normally use a series of transistors to interrupt the large-level signals into two separate areas, all of which may be amplified more efficiently. As such, class-AB amps are usually smaller than class-A amps. However, this topology adds some non-linearity or distortion in the area where signal switches between those areas. As such class-AB amps typically 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 is constantly being switched on or off. Thereby this switching stage hardly dissipates any power and phczif the energy efficiency of class-D amps usually exceeds 90%. The switching transistor has been controlled with a pulse-width modulator. The switched large-level signal must be lowpass filtered in order to remove the switching signal and recover the audio signal. Because of non-linearities from the pulse-width modulator and the switching transistor itself, class-D amps by nature have among the highest audio distortion of the audio amplifier.
To fix the issue of high audio distortion, newer Line Magnetic 518ia incorporate feedback. The amplified signal is in contrast to the original low-level signal and errors are corrected. A well-known architecture which utilizes this sort of feedback is referred to as “class-T”. Class-T amps or “t amps” achieve audio distortion which compares with all the audio distortion of class-A amps while at the same.