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Free shipping
for orders over £ 150
UK Team in London
Mega Store in Cologne
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30 Day Return Policy
Power amplifiers are the backbone of any PA or live sound system: they deliver the energy and volume required. Here’s what you need to know before making a purchase.
For small set-ups, active speakers with built-in amplification are often sufficient. However, for larger venues or when more headroom is needed, dedicated power amplifiers provide clear benefits.
Advantages of standalone power amplifiers:
Most models come as 2-channel or 4-channel units. There are also models with integrated DSP (EQ, delay, crossover, limiter). Common connections include SpeakON outputs and XLR, jack or RCA inputs, depending on the amplifier.
Well-known manufacturers include:
Amplifiers are divided into different classes. In PA applications, Class AB, Class H and Class D are the most relevant.
Class A provides excellent audio quality but poor energy efficiency and high heat generation. Class B is more efficient but prone to distortion. Class AB combines both strengths (clarity and efficiency), with Class H being a further development. Modern power amplifiers often use Class D: compact, lightweight, highly efficient, and powerful.
Probably the most common question: how many watts are required? It depends on the type of event and the venue. In principle: better too much power than too little. You can always turn down a powerful system; a weak one simply runs out of steam.
Examples:
Tip: Match amplifier power to your loudspeakers. A 2000 W amplifier is pointless if your speakers can’t handle it.
Basic rules:
Switch-mode power supplies are the standard in professional amplifiers: lighter, smaller and more efficient. Conventional power supplies are cheaper but bulkier and less practical for touring or professional use.
Amplifiers generate heat. To ensure reliable performance, cooling is essential. Two types are common:
Active cooling usually ensures higher reliability and is recommended for professional use.
Tip: Check dust filters and clean the unit regularly to maintain airflow.
To avoid clipping, overheating or equipment damage, good amplifiers include several protective features:
