If its a good after market headunit it should be ok, but an amp will always be the best idea.
there should be a fuse for the audio system in the car fusing panel, but if for the speakers only- then that should be within the audio system itself.
Polk Audio rc80i are speakers which can be mounted in your ceiling. Your local audio or electronics store should carry them, you can also get them here: http://www.amazon.com/Polk-Audio-RC80i-Ceiling-Speakers/dp/B00006BMQT
The purpose of a head amp in audio equipment is to amplify the signal from a microphone or instrument to a level that can be properly processed and heard through speakers or headphones.
Check the settings. Most likely speakers/audio chipset will be disabled in the audio settings.
you need to buy and install an rf adaptor
You need an audio board and some speakers.
You can turn on your monitor's speakers by inserting the audio jack into its audio-in port. If no audio is heard, ensure your computer's system volume is turned up.
Having either stereo speakers or headphones should be the goal. The two separate audio devices should work together depending on the situation you have and what you want to do with the sound performance. You can either sit at home and listen on your stereo headphones and enjoy and lay back in your bed, or you can have a party and play your music loud from your stereo speakers. Having separate external playback devices to go with your audio devices should be an essential to owning any kind of small audio device. You just can't get everything out of a small audio device.
Yes, Target carries audio speakers. Target carries speakers for the home and vehicle, as well as speakers for devices like iPods, iPads, and home theater systems.
speakers
Powered speakers have an amp between the audio source and the speakers. Non-powered speakers have the amp located in the audio source. Speakers are usually called powered if they are sold with an amplifier either attached to the speakers or physically near the speakers.
The audio signal to the speakers are not cut off since the connection to the front panel and speakers are in parallel.