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The Best Stereo Amplifier

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Buyer's Guide

Different Kinds of Stereo Amplifiers

Stereo amplifiers are certainly known popular devices for us. This device produces clear and loud sound from audio devices such as CD, DVD, USB device or any other media containing sound files. In short, from home theatres to audiovisual booths, stereo Amplifiers have become omnipresent in many households. However, it's very important for buyers to know all the features of a stereo amplifier to avoid any inconvenience while buying one.

Basically, a Stereo amplifier uses one or more output speakers to produce sound from another one or more speakers. The output is extracted and sent to a stereo processor that converts the output to an audible signal. There are many types of stereo amplifiers available in the market. Some of them have pre-amp and post-amplifier incorporated in them, so they are very flexible to use.

Basically, there are two main parts in a stereo amplifier. These are the input and the output devices. The input and the output devices are fitted with speakers that receive the stereo input signal times per second. With this arrangement, the stereo amplifier can produce signal clearly and distinctly even when the volume is set at full blast.

There are four major parts in a stereo amplifier. These are chassis, power supply, power tubes and capacitor. Among these, chassis is the most significant part of an amplifier. It is the most vulnerable component when it comes to shock or accident. Most manufacturers place protective clamps over the chassis to avoid unwanted damages. It is to be noted that power supply and capacitor need replacement very often due to damage or malfunction.

Power tube is the second most important part of all stereo amplifiers. These are usually comprised of four to eight ICs that are controlled by an internal circuit. The ICs can drive the various circuits like high level power, low level power and speaker output. Capacitor acts as a buffer for the high frequency audio signals.

One of the popularly used and widely used amplifiers is the Class A amplifier. These are better than the B and C models. They have high efficiency and feature a wide range of features. This means that there are no restrictions on using the amplifier in narrow frequencies. Although the output is limited, speaker level output is not affected.

Class B amplifier can produce wattage exceeding 500 watts into a single amplifier. However, the power output is limited to only eight ohms, which is not suitable for high wattage audio devices like CDs and DVD player. Some of the compact digital devices like USBs and MP3 players are powered by Class B amplifier. In addition, the amplifiers cannot drive high-impedance speakers at any quality level.

ono amplifier uses harmonic distortion for producing less-ringing tone. It has limited ability to handle high wattage audio devices. On the other hand, Omsolite stereo amplifier has a special circuit that produces less-ringing tone without limiting the power. It has three levels for selecting harmonics. They are: low, medium and high. It has twelve inches voice coil for deep bass tones and seven inches coil for sustaining the high quality tones.

Subsonic amplifier has high power output without using harmonic distortion. It utilizes phase division multiplexer (PMS) for high quality output. Yamaha and Sony are using this kind of amp since the output power can be set to preferred voltage. In addition, the subsonic amp will not affect the sound quality of the signal. However, the power output may become too low when the signal does not have the required power.

All the above amplifiers are categorized according to their power ratings. Amplifiers with high power ratings are usually found in top-level stereo units. On the other hand, lower rated amplifiers are used for their portability or as supplementary units. Portable speakers can also use high power amplifiers; however, the size of the speakers involved may also be a limitation.

Stereo audio amplifiers come in different designs and types. The most common type is solid-state, which has four pins that form an circuit. The potentiometer is used to control the volume from there. The most common type is power transistor, which is a semiconductor device that controls the amplifiers power. It is capable of changing its power level when the signal level changes.

Finally, it is necessary to consider the working principle of the stereo amplifiers. The operating principle will determine the amount of distortion in the signal. A working principle should be chosen according to the type of audio system and its frequency range. A working principle allows the user to change the signal level without affecting the other components of the system.