Aftermarket stereo sounds horrible

[chuy10]

Hello guys installed double din pioneer I have bose audio system installed double din using Metra gmos9 and ran a separate wire for remote turn on on stock amp I hear it come on but the volume is teally low can barley hear them and they sound distorted what can be wrong do I have to add aftermarket amp too didn't want to do that any help apreciated it's 00 ssei

[nos4blood70]

Any settings to play with on the Pioneer?

[Bugsi]

I just can't recommend keeping the Bose amp and speakers if you're using an aftermarket head unit. You can do MUCH better with an aftermarket amplifier and speakers in addition to your aftermarket head unit.