Music starts to distort at high volume

[iceman1575]

I didn't have the Bose system in my car (had the Delco h/u) but my front door speakers sound great for the time being, even being stock. Make sure you have them properly crossed over, I have mine cut off at around 120hz, on both the HU & the amp, and all four speakers will get loud.

Since you already went to walmart, if you can, get yourself a 4ch Dual amp and wire it for mids/highs. That's what I did. If you don't want to rip the doors apart to run the wires, run the front wire outputs up behind the h/u and splice them in.

[Toady]

It could be the headunit eq levels, adjust them so that at higher volumes they play cleaner, do that by lowering the eq