If everything is made by reputable brands. Its fine. Only takes a few watts to get loud. The installation is almost more important. Good solid mount prevents energy waste. Sound deadening so the car isn't interfering with the sound. Hear more from the speaker.
Your HU volume knob controls the input voltage of the amp. Higher the volume. Higher the input voltage, higher the amplification. It starts sounding funny make an adjustment and turn it down, too many watts are probably happening.
Adjusting gain is not a volume knob, it's for setting the amp.
If everything is made by reputable brands. Its fine. Only takes a few watts to get loud. The installation is almost more important. Good solid mount prevents energy waste. Sound deadening so the car isn't interfering with the sound. Hear more from the speaker.
There is no such thing as underpowering speakers. Depending on installation, they will perform better at rated power, given proper signal.
Your HU volume knob controls the input voltage of the amp. Higher the volume. Higher the input voltage, higher the amplification. It starts sounding funny make an adjustment and turn it down, too many watts are probably happening. Adjusting gain is not a volume knob, it's for setting the amp.