Hi everyone, recently I got into sound system stuff when I found my dad's old school stash. From the stash, I found a dual channel Orion 250sx, two Apache Amps 600w and 400w, a pair of Blaupunkt Velocity VPC10D woofers and a Pyle preamp. I've installed the Orion 250sx into my stock car head unit ( Ford Ranger T6 )with aftermarket front component speakers (Lightning Audio LA 1652S) but did not use the preamp because it's introducing distortion. Then for woofer, I did my own fibreglass enclosure to mount it under the back under seat storage tray. The problems I'm facing now is which amp I should use to power the sub woofer as I can't find any details about the Apache Amps online and how do I connect it to my head unit without the use of preamps. Also, I'm not sure which amps from the stash I should use to power my rear speaker (Rockford Fosgate Punch P1675). Sorry for the long post but I'm still fairly new in this field.