I just replaced my stock speakers to Alpine S-S65C. It sounded wonderful at the shop's demo, but in my car, the tweeter(mounted on dashboard) is kinda overpowered and the high pitch sound is hurting my ears even on low volume.

The woofers is weak, even weaker than the stock speakers. When I turn the volume up, it feels like it only increases the tweeter volume. Basically the sound is 70% from tweeters, 30% from woofers.

My current solution is the turn the treble all the way down to make it sounds bearable, but it still hurt my ear.

Btw, I have very little knowledge on car audio, I just want a better sound experience, but It got worst.

Appreciate any suggestions.

Installed on Proton Iriz, stock head unit.

Double checked by the audio shop, no wiring problem according to them. They add resistor the both tweeter to reduce the volume.

EQ setting is very limited, only can adjust Bass(+7 to -7) and Treble(+7 to -7).

I set it to Bass +2, Treble -7.

Well it does make sense, because the stock speaker does not have tweeter like other aftermarket coaxial speaker.

But even with added resistor and EQ tuning, it barely improve the overall sound quality.

Tweeter is still very overpower and the woofer is very weak, way weaker then the stock speaker.

I have to set the fader to -7(lowest is -9), so I can get more bass from the rear stock speaker.

Well it does make sense, because the stock speaker does not have tweeter like other aftermarket coaxial speaker.

But even with added resistor and EQ tuning, it barely improve the overall sound quality.

Tweeter is still very overpower and the woofer is very weak, way weaker then the stock speaker.

I have to set the fader to -7(lowest is -9), so I can get more bass from the rear stock speaker.