What do these Amp settings Mean?

What do these amp settings mean? and do?

• I have an Autotek Street Machine SX 2100 200 watts and it has there settings: Hi Variable and it goes from 75Hz-750Hz Line Out X-Over and it has three options Hi, Flat, and Low Amplifier X-Over and it has Hi, Flat, and Low as well Low Variable which goes from 40Hz-150Hz Bass Thrust which says 0dB-18dB and in between it has 42Hz Lastly it has Level and goes from Min-Max I need help with all of these, i have no idea what anyone of this means and i need help. Thanks

• Answer:

  I have an Autotek Street Machine SX 2100 200 watts and it has there settings: Hi Variable and it goes from 75Hz-750Hz. <----- If you have the X-Over switch set to "Hi", it controls the x-over point. All frequencies above that level will be audible. Line Out X-Over and it has three options Hi, Flat, and Low <---- That's basically a crossover for the line outs. Amplifier X-Over and it has Hi, Flat, and Low as well <---- Refer to the 1st answer. Low Variable which goes from 40Hz-150Hz <---- Same as 1st answer but when the switch is on "Low" all frequencies below that point will be audible. Bass Thrust which says 0dB-18dB and in between it has 42Hz <---- That's a bass boost for subs @ 42Hz Lastly it has Level and goes from Min-Max <---- That's the gain of the amp. It should be set to match the voltage output of the source unit. I need help with all of these, i have no idea what anyone of this means and i need help. Thanks <---- You're welcome.