rear channels

Fellas i am currently running a steg leo 650c component on front and a pioneer A1670f coaxial at the rear, my amplifier is a sony Xmn1004 which is a 70W RMS * 4 channel amp. 175W*2 bridge mode for subwoofer Since this amp has only LPF/HPF SETTINGS for the front and the rear channel only has the...