A general rule for choosing an amplifier is to select an amp that provides 1.5-2 times the continuous power rating of your speaker. This will ensure the speaker has enough power while leaving yourself 3 dB of headroom.
In respect to this, can an amplifier be too powerful for speakers?
An amplifier can be too powerful for speakers when it puts out a lot more wattage than your speaker can take. Speakers should not be driven way beyond their limits, or they can get damaged. Cranking up a far less powerful amp is also not good as it will result in clipping, which distorts the sound.
In this manner, how do I know what size amp I need? To calculate amperage, use the equation Amps = Watts/Volts. For example, a 200W light bulb on a 120V circuit would draw about 1.67 amps. Calculate the TOTAL amperage rating of all devices. Make sure they DO NOT exceed 80% of the breaker’s total amperage.
People also ask, what amp do I need for 4 speakers?
A four-channel amp works to power: Four speakers; Two speakers and a subwoofer—you can use a four-channel amp to power a subwoofer and two rear full-range speakers by bridging two of the channels to power the sub.