mounting

So I have just popped in 4 Polk db651s speakers in all the stock mounting positions in my 00 Jeep XJ (Cherokee for non Jeep ppl). The back was plug and play with the mounting. The front I had to drill a new hole, but they're in the same spot. My question is this: In the front, the (reused...

This is what I have right now on 1998 Ford Windstar. Speakers were never installed. Please see picture below. I got 5"x7" speakers. How can I install it? Should I just drill holes in metal or there are other options like mounting brackets? Is there a part number? Where would I get something...

Usually in the threads i read about amp locations, people just say "in the trunk" or "under the front seat". After looking around my car, there is no room under the front seat, and, other than the plastic floor, there are no flat surfaces in my trunk big enough for my amp. just for kicks i tried...

Got some Kenwood speakers in the rear which are bottom mounted. Working on the front doors which i knw are most likely gonna be top mounted. Wondering if top mounting or bottom mounting makes a difference on sound. If so i will change them 2 be top-mounted asap. Please gimme n e and all feedback...