The power amplifier is bigger than the horn.
Ensuring that the power of the amplifier is greater than that of the speaker is the cornerstone of improving the sound system. If necessary, the output of the power amplifier can be adjusted in time to make the sound more harmonious.
Power amplifier output and bass unit problems
According to your description, I found two problems. First, if the output of the power amplifier exceeds the tolerance range of the speaker, the sound will be distorted. Secondly, if the bass unit is not designed in full screen, the power of middle and high frequency may not be fully exerted, resulting in impure sound and overheating of the coil.
Processing method of high quality sound quality
To obtain high quality sound quality, it is necessary to divide the output frequency according to the frequency response range of the bass unit, or filter the high frequency before power amplification. In this way, you can enjoy wonderful music!
Problems needing attention in improving unit power
The method you said is also very practical. When the output of the power amplifier is sufficient, increasing the unit power can really improve the bass effect, but be careful not to exceed the normal range. Generally, the power of low-frequency units should not exceed 70% of the power amplifier.
Importance of high-quality equipment
Good sound is inseparable from high-quality equipment. If the unit and power amplifier are of poor quality, even if the power is high, it will only make noise.
I wish you a wonderful music time.
Finally, I wish you a happy mood when listening to music! Enjoy the wonderful time brought by every note!