If you already have a set of speakers(line array), then you need a good quality, enough-power amplifier. But the question is, what is the standard of enough power? Many people tell me that my speaker is 1000 watt, so I bought a 1000 watt amplifier, which is definitely enough. WRONG! In doing so, it is easy to destroy your amplifier.
1. For full-range speakers (including line array speakers and professional speakers), the power of the power amplifier needs to be more than 1.5 times the power of the speaker.
For example, if your speaker is 1000 watts, then you need a power amplifier with a minimum of 1500 watts. Of course, at the same time you have to pay attention to whether the impedance is consistent.
2. If you have a subwoofer, your power amplifier needs to be more than twice the power of the subwoofer.
For example: a 1000 watt/4 ohm subwoofer, the power amplifier requires a minimum of 2000 watts / 4 ohms.