Are you wondering what a decent car audio sounds like? Do you really need numerous number of components for it to sound that good? Does brand and price really matter? Do you really need high output power capacity on components you install? Based on my experience, the best sounding car audio is the simplest one you can put in. Yes, it comprises decent head unit, ample powered bridgeable four channels amplifier, with built in crossover. Mid bass speakers upfront with a pair of tweeters to handle high frequency sound. A 12" sub woofer for bass production. The Set Up -Head unit - I prefer Alpine CDA9887 with all its bells and whistles I love the 6-band EQ (Multi EQ Technology) as well as the built in crossover. You may google the specs. Its not just a matter of swapping the old unit with a new one. Proper splicing, insulating, and cable (to match the old cabling with the one that comes with a new unit) harnessing plays a major role in such set up to ensure safe radio operation...