are they worth a damn? installing subs in my friends truck in the morning and he doesn't have a dash kit/wiring harness for his truck yet so i'll be using one for the first time, are they are hard to use? and do they actually work/ sound good?

really brand dependent on how it sounds but they work alright for the most part.

can just youtube a video for it and it will show you everything.

All it has is speaker wire in, and rca's out lol. can't be that hard hopefully. Do you think it will be best to tap up by the head unit or just go to the back speaker closest to the amp?

Depends on voltage/brand. Some of them can push out 4-5v.

You had two of them?

Make sure out the car has a factory amp to grab the speaker outputs. I usually do them behind the radio so I can run remote with rcas. Unless your doing a 4channel amp

It's all done, the LOC was alot easier than I thought lol. those fucking Orion hcca's are loud as shit!

My friends had four channels lol. But I only used two. I still have a migraine from earlier today