4 channel amplifier

4 channel amplifier

4-channel amplifier - The powerhouse for the speakers

A powerful and undistorted sound enjoyment is an indispensable element for many car drivers. In order to meet the special sound requirements, the use of amplifiers is necessary. The following article provides information on how a 4-channel amplifier for acoustic power in the car. In the field of 4-channel amplifiers many of our customers resort to the proven brands B2 Audio, Vibe Audio and Pride back. Even for small money, there are already high-quality products here, such as the Vibe Audio "POWERBOX65.4M-V7" or "QUATTRO PLUS" from Pride. If you want to spend a little more, you get with the B2 Audio "RAGE 1000.4 MI" a very powerful compact amplifier with low voltage and clip protection circuit that will enrich your system without question.

What is a 4-channel amplifier?

A car radio, also called a head unit, delivers 12-16 watts of power per channel, depending on the manufacturer and model. However, this power is enough to drive powerful sound systems not enough. The subwoofer in particular forms the strongest link in the chain and requires several thousand watts, depending on the type of speaker. A 4-channel amplifier has four outputs for two pairs of loudspeakers or one pair of loudspeakers plus a Subwoofer, or a speaker system in the front and rear or the parcel shelf. Basically, an amplifier has three main connections for the power, which are composed of remote, ground (GND) and +12. The remote connection is used for communication between the car radio and the power amplifier, which in most cases is realized via a blue-white wire. The GND connection serves as the negative terminal and is connected to the body of the vehicle. For the power supply, the +12 terminal is used, through which the amplifier is connected to the battery. In most cases, the music signal comes into the amplifier via an RCA cable, or a high-level speaker cable. In rare cases, this can also be done via Bluetooth or optical cable.

How does a 4-channel amplifier work?

An amplifier takes a small voltage and passes a larger voltage to the speakers. This process is based on transistor circuits and operational amplifiers. The circuits used in the 4-channel amplifier are electronic semiconductor elements responsible for amplifying currents and voltages. Since the operation of these components differ depending on the model, power amplifiers are divided into different classes from A - D, where the most popular version of the AB amplifier is. This type produces a distortion-free audio signal due to a constant transistor voltage. At the same time, unlike a class A amplifier, the power consumption turns out lower. The exception is the class D amplifier, this is a digital audio amplifier that deviates from the principle of a simplified transistor circuit. In terms of sound reproduction, AB amplifiers have the edge. Especially with the tweeter and midrange speakers in the front system, a precise sound reproduction is an important factor. However, modern digital amplifiers in the upper price segment convince with a high efficiency of up to 90 percent and generate less heat. In addition, digital amplifiers have high-pass and low-pass filters for a precise sound image.

4-Channel Amplifier - What to Look for When Buying

Before buying, it should be clear how many loudspeakers be connected to the amplifier. An important factor with a 4-channel amplifier is that the output power (RMS) of the individual channels is in proportion to the sound system. For optimal listening pleasure, the amplifier power should always be greater than that of the speakers. The output power per channel depends on the level of electrical resistance, which is in technical jargon as impedance in technical jargon. Loudspeakers in the car hifi sector usually have an impedance between 2 - 4 ohms. A high resistance results in a lower current flow, which is why both sides should have a low resistance value. However, it is important to avoid falling below the minimum resistance, which is especially crucial when bridging two stereo channels. In addition, a wide frequency range and frequency range suitable for the connected speakers is important for a suitable music sound.

4-channel amplifier - Our professional tip:

A frequency range of at least 20 Hz - 20 kHz is recommended for a 4-channel amplifier. In order to direct the correct frequencies to the appropriate elements of the speaker system without distortion, come Low and high pass filters are used. In addition, it is important to ensure a low distortion factor below the perception threshold of 0.1%, which is usually referred to as THD or distortion factor.

Which manufacturers does Masori distribute?

At Masori, 4-channel amplifiers are currently available from the following manufacturers: ARC Audio, Audio System, Awave, B2 Audio, Blam, DD Audio, DLS, Edge Car Audio, ESX, FOR-X, Ground Zero, Hifonics, JL Audio, Kicker, Morel, Musway, Pride, Rockford Fosgate, Soundigital, STEG, Stetsom and Vibe Audio.


A 4-channel amplifier is ideal for driving a front system in combination with rear speakers. Our store offers for every project a 4-channel amplifier with the appropriate output power and an extensive frequency range. To guarantee the production of a high-quality sound image, consumers should make sure that the amplifier and loudspeaker are matched in terms of impedance, power and frequency range.