A Look At The Phrase "Wattage" Of Mini Amps

By Sherry Lambert


Selecting the ideal type is tricky while faced with a great amount of different technical jargon in addition to specifications, like "T-amp", "channel separation", "efficiency" etc. You may not even fully comprehend the most fundamental of these terms, such as "amplifier wattage". In this commentary, I will have a closer look at one of the most essential of these terms: "amplifier output wattage". This term is also often known as "wattage". Amp specifications are now and again hard to interpret as they are not fully standardized. As such it may be tricky to figure out the actual functioning of the amp merely by investigating the specs. One good technique however is to do a listening trial ahead of paying for your audio amplifier. During this trial you ideally want to set up the amp in a similar environment as your application. Now I will describe the "power" rating of audio amps. This term is one of the most essential and maybe vital specifications to comprehend.

If you are looking to buy an audio amplifier in order to set up your home speakers, you will time and again be faced with a number of bizarre terms describing its performance. However how do these numbers relate to how the power amplifier sounds and how are these to be interpreted? Let me now proceed and clarify the power spec of power amplifiers.

A few specs are going to present the power in "Watts peak" while others are going to publish "Watts rms". "Peak" means that the amp is able to provide the output power for a short amount of time only whilst "Watts rms" means that the amplifier will continuously deliver that level of power. The peak output power spec in the past habitually led to makers listing large wattage ratings for small amplifiers. However, in practice those amplifiers would not be able to sustain bigger amounts of output power for larger amounts of time.

Music and voice is not uniform by way of volume. Thus the peak power rating is still essential, though not as essential as the rms power rating. Ideally the amplifier will display both the rms and peak power rating. Having a large peak power spec will ensure enough headroom for audio peaks which are widespread in audio signals. This is because at certain moments the signal is going to exhibit peaks of power that by far surpass the average power of the signal.

Please note that often the peak power of the amplifier is going to depend on the impedance of your speakers which is commonly between 4 and 8 Ohms. Amps have a limited output voltage swing due to the fixed internal supply voltage. Hence the highest output power is going to differ depending on the loudspeaker impedance. The lower the loudspeaker impedance the higher the maximum power the amp is able to output. As a result often highest output power is given for a specific speaker impedance.




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