radio in glove box?

I have seen a few different remote mount amplifiers that are either 2 or 4 channel, and allows you to plug in your phone or mp3 player. I plan on going this route and leaving my fender uncut. No antenna hole, and my radio delete intact. The one i am liking is $100, 4 channel, and about the size of 2 cigarette packs. I want to mount this either in the dash behind the delete plate, or under my seat. Will be running buckets, and I dont have a console. I plan on running a hookup wire that will lay along the drivers seat that i can plug into my phone. I plan on sticking velcro to the phone case and sticking it down to the trans tunnel. I have pandora 1, and music i loaded into my phone. I am sure i will have plenty to listen to.