I'm planning on having top of the line MB Quarts installed and wanted to know if anyone else is using these speakers with 12" sub and how they like it?

Stock stero
MB Quart PSD216 6.5" speakers
Kenwood 12" Sub
V12 Amp 4/3/2 chnl.
Kenwood graphic EQ

 

The top of the line 2 way MB Quart speakers are the QSD216, which retail for $1499. It depends on personal preference whether you like them. MB Quart's titanium tweeters can be too harsh for certain ears, but incredible to others'. They should sound excellent in the S2000, but make sure you power them with a good amp. If you are going to use what you have listed, then I suggest you buy a new headunit also. You're not going to get too much bass into the cockpit of the car. The bass would sound pretty good if your car was stopped, but it is drowned when you are driving. Good luck with everything.

 

I'm using MB's with the JL Stealth box and a couple of rear 6.5 Kenwood speakers. I'm happy with the setup.