full

im newbie.. can I ask something about frequency and LPF and HPF and Full.. I have 4 channel amplifier and 6.5" midrange raw drive speaker. and tweeter.. I don't know if I put to FULL or HPF.. and if I put to HPF what frequency is the best for 6.5 raw drive speaker.. I don't know the frequency...

Never got around to using these... In perfect shape. Looking for $40 shipped in the US. I accept paypal. Image from PE; And PE link; Dayton Audio RS100-4 4" Reference Full-Range Driver 4 Ohm Thanks for looking!