How would I go about wiring up a head unit and amp and such in my home? I've seen it done in stores where they have speakers and head unit and amps wired to a wall... How would I do that? Main concern is power and grounding.
Ebay has them for the best prices. Depending on your amp's power requirments, it would be best to get a 30A-50A power supply. Astron and Tenma are my favorites, price range $50-100.
Computer power supplies work but: 1)They have extremely dirty output due to lack of proper filtering capacitors. 2)They have inadequate cooling-it will die really quickly (within weeks or months).