All manufacturers specify two power parameters for their loudspeakers: rated power and peak power. And here you need to understand that the rated power is the actual working power of the acoustics, and the peak is just a marketing ploy. If you apply power at the peak level of the amplifier, the speaker may even burn out.
To determine which speakers will play the loudest, you need to consider not the amount of Watts, but a parameter such as sensitivity. After all, volume is measured only in decibels. For conventional coaxial acoustics, 89-90 dB is sufficient. Any value above 97 dB already represents a variety of options. Note that sensitivity is a vector quantity, and a difference of just 10 dB will result in a volume increase of about 3 times. That is, a speaker with a power of 70 W and a sensitivity of 97 dB will play 2 times louder, while a speaker with a power of 150 W and a sensitivity of only 89 dB.
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Car audio: tips for beginners – When choosing an amplifier for a car, you should, first of all, focus on the characteristics of the acoustics installed. We recommend that you purchase an amplifier taking into account that it has a power rating that is slightly higher than the power rating of the speakers. The higher the power of the amplifier, the better it will control the acoustics and work with margin, without suffering unnecessary overloads. This will also have a positive effect on the sound quality.
Also, don’t forget about the correct setting of the amplifier. Here, you should follow the following outline:
1) First, with the help of filters it is better to cut low and excessively high sound frequencies:
For LPF POP less than zero, HPF 200-250, it is recommended that the crossover be switched to HPF mode;
For Midbass it is recommended to set LPF 60, HPF 80-125, set the crossover to maximum;
For high-frequency LPF less than 0, HPF 6000-8000, crossover switch for HPF mode;
For the subwoofer, select the Sabsonic 20-25 level, LPF 35-50 (here, adjust the port settings), set the crossover to LPF (low) mode.