is that not a FACTORY OEM ANTENNA???!?!?!?!?!
if it is, its amplified, i have the wiring diagram for your 2007 miata
the wire isnt WITH the ANTENNA lead, its on the factory harness
maybe you should take your car to a car stereo store
or at least i think you would be using a Metra Harness
like i said before BLUE wire
"Did you test it in carwings??"
Sun, Come shine my way
May healing waters bury all my pain
Wind, Carry me home
The fabric of reality is tearing apart
The piece of me that died
Will return To live again