I had 8 gauge wiring and just replaced it with 4 gauge and its all hooked up right and now my subs still sound good but my highs seem like there not as loud does anyone know why this might happened?
maybe you forgot a setting when redoing your radio settings
probably less electrical fluctuation on the sub amp and what your experiencing is the benefits of having bigger power wires (besides amperage/temperature handling)
the sub amp is now taking the power the speaker amp was using because its wires are now larger. You need to even out the amps power wires- all at the same gauge, so the power is equal.