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PA Amplifiers
In the PA amplifier category, there are various devices available in all price ranges.
Here you can find all the information about the features, differences, prices, and technical specifications of the products in our assortment.
These are the tasks of an amplifier
An PA amplifier primarily serves to make sound louder. More precisely: it amplifies the weak electrical signal from the mixer (often connected with a crossover) by a large factor, without compromising the quality of the signal. Due to constant signal amplification, signals are amplified so they can easily pass through a speaker. So, the power is important. How well, in terms of sound quality, this works depends on the type of amplifier and its position in the signal chain.
In general, it is worth noting: ideally, the amplifier has high power with low weight and low power consumption. Also, the dimensions should be as minimal as possible with an optimal amplifier. Since with higher efficiency, heat production decreases and any noise and other side effects increase, sound quality must be high.
A lower weight facilitates the transportation of stage equipment - this is important especially for musicians on tour or who perform regularly. Bringing together all these aspects is a difficult task. After all, the weight depends on the power transformer and the necessary cooling measures.
The sound matters
An amplifier itself does not have a significant influence on the overall sound. Any irregularities in the frequency spectrum can also be corrected with an equalizer. However, the sound of the PA amplifier must be right. This is ensured by the speakers - since the amplifiers are directly connected to the PA speakers, they also take over the strengths and weaknesses of the respective model.
Depending on the voltage and frequency, speakers require different currents, sometimes direct current and sometimes phase-shifted. Also, the PA amplifier often redirects the energy stored in the crossovers and moving membranes back to the amplifier. All this makes the amplifier's job more difficult and distinguishes good devices from less good ones.
Performance under Load
Good amplifiers also deliver performance under load. They must neither distort nor limit prematurely to ensure optimal sound quality. The energy returned from the speaker must be absorbed without loss of quality, as only then can control over the frequency be maintained - failure to do so results in distortions and other problems.
The most important factors: current delivery capability, linearity, speed, and a high damping factor to prevent saturation. To meet all these demands, the amplifier must be equipped with a large power supply, oversized output stages, and as few interference signals in the frequency response as possible. The power amplifier has a significant influence on the damping factor. However, the cables used also play a role. The rule of thumb here is: the shorter, the better.
Not only Sound Quality Matters
Even today, many musicians are unsure which power amplifier to purchase. These fears are largely due to the problems of past decades. Especially in the 70s, it was common to produce low-power, heavy power amplifiers.
Today more than ever, the focus is on quality.
The installation of high-quality circuitry is standard for all reputable manufacturers. However, there are some points to consider when purchasing a power amplifier - from price to sound quality to the installed individual components.
Technical Specifications - What to Consider
Those who purchase a power amplifier also want to be informed about the performance. However, the information provided by the manufacturers can confuse especially less experienced buyers.
We explain what the terms mean and what details to pay attention to when making a purchase.
RMS Power: RMS stands for Root Mean Square. The abbreviation provides information about the device's power and is internationally recognized as a measurement value. To determine the value, a complex measurement method is used that measures the power over the entire frequency range using the so-called pink noise.
Peak Power: This term indicates the maximum power of DJ amplifiers and similar devices. This allows musicians to immediately see which frequency ranges a speaker can temporarily withstand before distortions and other signal disturbances occur.
Impedance: The lower the impedance of the speakers, the higher the power delivered by the power amplifier. The term indicates how likely signal distortions or power losses are.