If you have purchased an audio amplifier, it makes sense to spend a few minutes to figure out some key parameters of loudspeakers in order to purchase speakers which will work best with your amplifier.

One of the most important speaker parameters is the speaker impedance. The impedance is basically a ratio that determines how much voltage the amplifier needs to apply across the speaker in order to generate a certain amount of wattage. In other words, the higher the speaker impedance, the higher the voltage swing of the amplifier has to be in order to generate a certain speaker wattage. The speaker wattage will determine the loudness of the speaker.

Many small amplifiers work with an external power supply. If you look at the power supply label you will notice a voltage rating. The voltage rating determines how much …