Alot of work, it took me and my buddy about 30 hours. Im running Hertz Hi-Energy Components 2 way up front. Infinity Reference Coaxils for rear fill in the rear doors. Alpine Type R 10inch in a 1.25 Cubic Feet Sealed box, with the front doors dynamatted and the Rear hatch and trunk area. As for my amp, I went with the JL Audio 900/5 (5 ch amp, with 110RMS at the four each of the 4 channels and 1 500RMS mono for the sub) which was installed under the front passenger seat. We tried without a headunit and its just not good. Speakers wont play as they should as well as the sub. Basically stock head units are equalised to make stock speakers sound good, in turn this equalisation is a mess for any aftermarket setup and there will always be noise from the stock radio, constant buzzing. I can only imagine how this stock radio is tuned to run BAMBOO speakers lol.
For anyone who still wants control of the factory radio and still wants good sound, there are solutions like the JL Audio Cleansweep, which basically brings the signal for the stock head unit to a FLAT responce so you speakers/sub sound the way they should from the factory. there after any tuning is done with the Cleansweep and you still have your factory radio working, this however is still not as good as having an aftermarket headunit. However there are always setbacks when using a cleansweep which I wont go into detail about. I however always believed in Headunits, so we custom fit my Pioneer 8300 into the center armrest (alot of cutting and dremeling, so be aware, the center console must completely come out and they are metal shields that need to be tampered with and cut). My armsrest closes as it should and I know that I have all the tuning I need from my amp and speakers that I spent alot of money on here in Canada. I didn't spend alot of money for nothing, so I figured I would go all the way or go home LOL. However my stock radio no longer works and as of now the module which supports bluetooth for an aftermarket radio in th Ct200h is still being developed. So in turn you loose bluetooth/am/fm/satellite radio from the stock radio. Since I am an audiophile I could care less, because now my system sounds the way I want it to CRAZY mind blowing as one of the members from DIYMOBILEAUDIO said. All about sound quality for me, Function over Form. I am in Montreal, so of anyone ever wanted to meet up I would be happy to show the work I've done with my buddy, so anybody interested can hear for themselves and make the push if it interest them. I have also taken enough photos which I'll post of to show you guys. Enjoy!! I was suppose to also take photos of the LED Interior or aftermarket HID kit which I still havent got around to doing, but I assure you I will this week. I have been soo busy with my audio project.