/ / Dual-channel amplifiers: basic parameters, types and classification

Dual-channel amplifiers: basic parameters, types and classification

In various stereo systems, the sound amplifieris built into the device. However, when connecting speakers with more power and setting a louder sound, you need to use two-channel power amplifiers. You can connect amplifiers to both speakers and common channels using a bridge connection. They support low-resistance load. The main advantage is the ability to save the adjustment combinations.

two-channel amplifiers

When the amplifier is placed in the stereo system, the sound quality is not always good. You can fix this by installing a sound processor.

Parameters of two-channel amplifiers

Power is an important indicator for the amplifier. It can be of two types: nominal (RMS) and maximum (PMPO). When buying in documents, you can read about the nominal power. On the product itself they write about multi-channel, which shows the maximum power of common channels. When buying an amplifier, you should check the availability of a certificate, which indicates the factory capacity measurement of the device.

two-channel power amplifiers

Two-channel amplifiers contain a built-incrossover, which makes it possible to cut the bottom, leaving the upper frequencies. Using this parameter, you can adjust the cutoff frequency gradually and reproduce the sound gain on one channel. The bass setting key is a useful feature, especially when you connect a subwoofer: it is possible to smoothly increase the bass level.

Bridge connection gives the opportunity to increase the total capacity. With this method, the connection of powerful subwoofers is used.

Two-channel amplifiers are equipped with a connector forwire connection. The line wires receive signals from the standard stereo system. From overheating of the system in the amplifiers, a fan is installed.

two-channel sound amplifiers

Choosing amplifiers of sound, pay attention to the trading manufacturer, giving preference to those who have proved from the positive side.

Basic views

Two-channel amplifiers can be: lamp, transistor, hybrid, digital and tripat. The first type uses an electronic vacuum lamp, and the sound is cascaded. Transistor amplifiers are more powerful and generate a louder sound. Digital amplifiers work on integrated circuits, have high efficiency and better sound quality.

Hybrid amplifiers consist of electronic tubes, semiconductors and integrated circuits, combining the advantages of previous types.

Classification of two-channel amplifiers

Depending on the principle of operation, several classes of two-channel amplifiers are distinguished, which are discussed below.

Amplifier type

Class

Short review

Benefits

Lamp

A

They have low power and high cost. They distort sound, resulting in an efficiency factor of 20%.

Low power.

Transistor

AT

High performance factor, dissipate heat energy, but not popular.

Dual-channel power amplifiers have a reduced noise level.

Compactness, work efficiency.

Transistor

FROM

High performance factor: 75%.

The best option for car audio system equipment.

Hybrid

AB

Two-channel sound amplifiers have a high performance factor.

Mode - intermediate between modes A and B.

All the advantages of classes A and B.

Digital

D

The ability of digital signal processing.

Use PWM modulation and fixed frequency.

Presence of a smooth phase regulator and bass lifting circuit.

Small size, good sound in its purity, high efficiency.

Digital

G, H

The amplifier consists of a pulsed power supply and provides digital signal processing. High cost.

Good sound quality.

Tripatas

T

Output transistors commute at a pseudo-random frequency, depending on the level of the input signal.

Modulation schemes produce extremely small nonlinear distortions. High efficiency.

Car Audio Amplifier

Two-channel subwoofer amplifierIt is intended for amplification of a sound and improvement of quality of loudness up to an optimum level. To properly buy a suitable device in the car, match it to the characteristics of the subwoofer.

two-channel subwoofer amplifier

Two-channel amplifiers will create a harmonious sound for any stereo system.

Read more: