what does it mean to bridge woofers or amps and what are all the other kinds of set ups and which one would be best with my mtx subs that i mentioned before?
Bridging is basically just the method in which your wire your subs together and connect them to the amp. You would wire two subs together in series or paralel to 1 combined L/R channel on the amp for greater output at that 1 channel.
To simplify the bridging explanation check out the link below, as it provides what I feel is the best and most accurate explanation.
Your particular subs each have dual 2 ohm voice coils, therefore are capable of a variety of final ohm loads. The key is that the amplifier must be rated to handle the final ohm load of the speakers. You could for example wire both voice coils in paralel making each sub 1 ohm and then paralel the subs together for a final load of .5 ohms.- Only a few amps can handle this low of impedence- so use caution. Otherwise, you could wire each of the speakers voice coils in series to leave each woofer with a 4 ohm load and then wire the woofers together in paralel to achieve a final load of 2 ohms.
Those are just a start- and there are a few more options as far as wiring also. I would honestly start out with the later wiring option above leaving a 2 ohm mono (1 channel) load. It should be safe and versatile enough for what you are looking for.