hey guys. i'm happy with my bose speakers (at least for now) but i'm planning to do some stuff in the trunk and i need 2 things:

1) recommend me an inexpensive speaker that's no more than 6" high to put in the trunk lid
2) how would i connect that to my current system. i have a kenwood HU but all the sound is running through it to the stock sound system.

when it comes to speakers i dont know much, but i think i need a tweeter? i dont know, just want to be able to hear the music in the trunk besides just the bass like i am currently. thanks!