How do I add another set of speakers to my car?

Is this car audio set up right?

• havent bought the car yet but planning too...2011 honda accord coupe with the factory navigation... the car has 7 speaker system one is sub so six speakers and a pair of tweeters (according to fitting guide on various car audio wholesale websites). I want to replace all six speakers and tweeters as well as add a pair of subs to the back heres the run down: 1---Kicker 08DS12L74 Dual 12" Vented Subwoofer Enclosure Loaded with 2 Solo-Baric 12" Subwoofers 1---Kicker 10ZX1000.1 1000W RMS D Class ZX Series Mono Subwoofer Car Amplifier (ZX1000.1) 1---Infinity Kappa 10.9t 1" 150W Dome Tweeters Set (pair) 6---Infinity Kappa 63.9i 6-1/2" 3-Way 225W Car Speakers 2---Infinity KAPPA FOUR 4-Channel 600W RMS KAPPA Series Car Amplifier ..... my question is it necessary to purchase the 2 4 channel amps if i want maximum sound quality from the 6 infinity speakers seeing as the 4 channel works optimally with four speakers...also i assume it is possible to do all of this while keeping the factory navigation system and functions intact. sort of my first time gettting an audio upgrade without getting a new head unit so jw...also opinions on better speakers or subs are welcome.thx

• Answer:

  Your setup sounds pretty good. Kicker is an alright brand and Infinity makes very good speakers. However, the only issue (If I was in your position and was considering this setup) was that you'd need more powerful amps; as they may be 600 watt amps, they separate the wattage into each speaker evenly. (Let's say you hook up 4 speakers to a 4 channel 400 watt amp, each speaker will get 100 watts) So I'd suggest getting higher wattage amps, just to make sure you get the most out of all those speakers.