Amp adjustmenst?

[bmw325csi]

Hey people, yesterday I installed my sound system in my vert. I have a 4 channel "RIO" amp for the insides and an unknown amp and subs for bass. I installed 5.25 components up front, stock in the rear because the components didn't fit back there.
At the moment I have the 4 ch amp set all the way low. My question is this, which setting would be best, lpf, hpf, full? How much should I turn the dial to not pop the speakers. Any input is appreciated. I know this could sound very good, but atm its not perfect.

[kronus]

lpf = amp only outputs bass signal
hpf = amp only outputs tweeter-level signal

You don't need either setting as you're running 5.25s and your fronts have internal crossovers.

Set gain to whatever makes your head unit's volume knob work as you want. You not blowing your speakers depends on how high you set the HU volume, not the gain setting.

[bmw325csi]

Thanks Kronus, Your the man with your quick reply