Driving the speaker with too much power is usually the problem. In a surround sound setup, make sure your choose 'small speaker' for the speaker type on your receiver if you are using the B20's as front or center channel speakers. This will offload some of the low frequencies from those channels to the subwoofer.
yes you can cause i have two 12 inch subs and 2 1000 watt amps
insanity
It can sometimes cause the speakers to sound distorted if wiring malfunctions
You should consume a lot of vitamins to boost your immune system. Then, you shouldn't repeatedly get sick =]
No It wouldn't
Running the engine hot repeatedly.
It shouldn't cause problems as long as they are installed correctly. This is probably a job that is best left to a professional, who will know the best placement for the speakers to minimize damage.
There are a few reasons that would cause your 2002 Pontiac back speakers to only work sometimes. The most common cause is a loose or corroded ground wire.
The purpose of dual voice coils is to offer more wiring options. To answer your question we would also need to know how many woofers, and therefore how many voice coils, are involved in this equasion. For wiring guides, check http://www.rockfordfosgate.com/rftech/woofer_wizard.asp. As long as you don't wire at a lower ohm load than your amp can handle [ex. wiring to 1 ohm when your amp is only 2 ohms stable] or wire for more power than your woofers can handle, or allow for too much distortion to be played through the woofer, there should be no damage to your equipment. Distortion will damage your woofer before overpowering will. Ohms are a measurement of resistance to electricity and so the higher the ohm load, the lower the power. If you wire an amp to play speakers at 4 ohms, the speakers will receive less power than if they were being played by the same amp at 2 ohms. Off the top of my head, the Kenwood KAC-9103d pushes 500 watts rms at 4 ohms and 900 watts rms at 2 ohms. The trade off is that while the lower ohm loads offer more power, they come with more distortion as well. Have fun.
Blown speakers, bad wiring or radio problems.
Short in the wiring or the radio itself.
Low battery, bad connection or starter.