How should I upgrade my sound system?

My Scion xB currently has
=Stock mids and highs – powered by a 1600W Piece of crap amp;
=One 12″ audiobahn woofer powered by a 750W Pyle amp;
=Four 8″ Pyramid woofers all four powered by a 1200W MTX amp;
=Lightning audio 1.2 farad capacitor clipped to the side.
It’s arranged in such a [...]

which two of these is false?

a)the range of frequencies that humans can hear is restricted
b)perceptual coding techniques for both audio and video are used in the MPEG set of standards
c)human audio perception at a particular instant in time is independent of the overall sound intensity near that point in time
d)human visual perception is less sensitive [...]

digital audio connections?

!!!!!PLEASE ANY audiophile HELP ME!!!!!
I recently bought 2 logitech digital z5500 speaker system and an onkyo DVD player.my problem is at the rear of the dvd player there is only one digital coxial output and each speaker system with 1 digital coxial input . now my question is ,is there is wire available [...]

Do I have to buy a high end projector and screen to display my video games?

Hello ^_^
I am currently looking into purchasing a projector and projector screen to display video games on a larger surface.
After checking out what’s on the market I noticed there are inexpensive business projectors and much more expensive home theater projectors.
I’m [...]

Digital coax audio cable & analog cable…is there a differance?

Is a digital coaxial audio cable much different from a regular coax cable used for cable vision? Digital audio cables appear to be a lot more expensive than regular coax cable and the only noticeable difference is the Digital audio cables have nickel looking or gold [...]