Tech Bits Blog

How Big of an Audio Amplifier Should You Buy?

How Big of an Audio Amplifier Should You Buy?

The size of the audio amplifier does not always necessarily determine how much power you will get. Therefore, it is much more important to investigate the specifications when purchasing an audio amplifier then just assessing the size. The fact is that only amplifiers have become much smaller lately. The reason is that technology has shifted towards digital switching amplifiers from analog technology. Therefore, the power efficiency of audio amplifiers has been improved drastically.

As a result, not only have amplifiers become smaller but their power efficiency has improved and also they have become less expensive. That is hardly surprising because you will not only need smaller heat sinks to dissipate excess heat but also modern amplifiers require small the power supply. The higher the efficiency of the amplifier and the power supply, the smallest size.

The wattage of an amplifier which you will need really depends on your speakers and also on the environment where you are setting up the speakers. If you are trying to connect fairly large speakers which are rated at a high wattage then you will need a strong amplifier. I would …

How to Tweak the Maximum Performance of Your Audio Amplifier

How to Tweak the Maximum Performance of Your Audio Amplifier

The performance of audio amplifiers is limited by several factors. I will take a look at some of these factors and explain how we can maximize performance of your amplifier.

First of all, the power supply voltage has a major impact on the amplifier output that should swing. Let’s imagine the output terminal as being connected to two MOSFET transistors. The amplifier internally can either open one or the other MOSFET thus connecting the output terminal to either a positive or negative voltage supply rail. If the amplifier is powered by AC voltage, typically the amplifier will work with a positive and negative voltage. As an example, the amplifier might be using + and -50 volts. As a result, the voltage can swing within this range.

Using this 100 V range, you can easily drive speakers even with higher impedance such as 8 ohms speakers. However, some amplifiers especially many amplifiers unlimited in their output voltage swing because they typically use a fairly low power supply voltage. Some models use an external wallwart. This wallwart might only give 12 or 24 V. Therefore, there is no …