Question:
I am not sure why the radio receptions of factory installed decks have better reception (especially in A.M. radio stations) compared to brand name or aftermarket products. Why does it always occur to me that when I switched to aftermarket, it always make static noises and what should I do about this to correct the problem? Pls. note: I always have my system professionally installed. I also want to hear feedback from those who currently have XM satellite radio: I never had one because I don't want to pay the extra monthly fees but I want to know if its all worth it. I listen mostly to radio talk shows especially sports.
Answers:
Whats the easiest way to install a 2channel Amplifier and Subwoofers?
there is a thing not many remember called antenna 'trim'. in teh early days of radio there was an a adjustment in hte radio to set the tri to match the antenna. In brief, there is a capacitance and inductance to an antenna that is a funcion of the wire and how long it is and how close it is to the car body. this makes it tune to certain frequencies in preference to others.In the last 20 years or so the antenna impedance has supposedly been standardized and antenna trim was supposed to be no longer necessary.
In practice, when a radio is made for a particular vehicle the front end module of the tuner frequency can be set to match the know antenna characteristics. But an aftermarket unit is set for the theoretical standard. this means that on some (not every) vehicle, tuner reception (especially AM) will be a little bit worse.
almost all reputable brand head units have no provisions for the end user to adjust trim anymore. very few will allow a service tech to 'align the front end'.
so sadly, it is likely something you will never get away from.
More Questions & Answers ...
This article contents is post by this website user, CarQnA.com doesn't promise its accuracy.