I don't usually listen to that volume. I just installed the new speakers and tested the new system, but thanks. I firstly though it was a problem that I put the coax speakers in the car's stock component system, as there might be a crossover filtering the frequencies.
I have Mazda 121 (2002) and bought Sony MEX 5200BT + Crunch 80w coax speakers. I put them on the front door and basically until 75% volume it is all fine. After 75% volume it all sounds pretty bad, some noises come out and the sond is actually barely recognizable. On <75% volume, the sound is...