I went through the trouble of sanding down the lower edge to get a correct fit..looks good..controls the 6 changer stock in my Lightning..just has terrible sound quality when cranked above half way...It is a plug and play...I have line level hook ups for the amp from my stock head unit..same wiring I used on this POS...
It came out of my daughter in laws 03 V-6 stang...I had always heard the mach stuff was very good..Not this one...pulled it back out...nice paper weight.

 

Please check out this thread and see if you have any recommendations..

https://www.f150online.com/forums/sh...024#post804024

 

Not sure what to tell you... I've always heard good things about the Mach mp3 system. Maybe you have a dud.

RP