4. I've had a new amplifier installed and every time I turn my car on or off my speakers pop. Is there anything I can do to stop the popping?
The most common cause we see of speakers popping when a new amplifier has been installed, has to do with what is called the 'remote turn-on lead', or 'wakeup lead'. This wakeup lead is what tells the new amplifier to turn on at the proper moment. The wakeup lead should be connected to a wire exiting the factory radio that is typically labeled as 'amplifier turn-on lead'.
For a variety of reasons these two wires sometimes do not get connected to one another. Instead, to turn the new amplifier on, its wakeup lead is connected to an ignition source. Doing so leaves the new amplifier on any time the car's key is turned on. The reason a pop is caused by this method is that the amplifier is 'awake' when the audio signals come from the radio. A small voltage "blip" accompanies the very start of the audio signal when the radio is turned on. Systems are designed for the amplifier to "wakeup" shortly after this blip enters the amplifier - thus the blip is never heard. If the amplifier is already awake when this blip comes through, it amplifies the blip, turning it into a pop.
Some vehicles do not have a turn-on lead that is compatible with aftermarket amplifiers - the vehicle may use a 5-volt signal, but the amplifier needs 12 volts in order to turn on. SoundGate's TRIGLOHD interface remedies this situation, transforming the 5-volt signal into a 12-volt turn on lead. A low-voltage factory amplifier turn-on lead will be found in many Ford Motor Company vehicles, Lexus automobiles, and Infiniti automobiles.