You installed an aftermarket
radio and hooked it up to your stock speaker system. Now your factory subwoofer pops when you
turn your vehicle on.
If so it could be caused by
an improper voltage going to the factory amplifier. This is generally the case with aftermarket
head units and newer Ford products.
Aftermarket head units will send a 12V signal to turn on the
amplifiers. Some Ford factory amplifiers (and possibly other makes as well)
need 5V other wise they produce a loud pop when they are turned on.
The SMT-AI will drop the
voltage of the amp turn on from your aftermarket head unit so your factory
amplifier will not “POP” when you turn on the vehicle.
I built one of these for my
own 2003 Lincoln Aviator. I was told
that this seems to be the solution for Ford Explorers, F150’s, Mustangs with “Shaker” radio systems, vehicles like those.
Couldn’t you just go out and
get your own 5V regulator and wire one of these up yourself? Sure, information on this circuit is on my technical support page here. Or if you want to
make it easier on yourself, just order mine.
There are other
possibilities which can cause “popping”.
The main one seems to be that the amp is turning on before sound is sent
to it from the head unit. For more
information please check the tech support page for this item here. I will list a bunch of links and a way to
test if this is your problem.