I've just bought a 2005 S2000 and as everyone else has found the audio is crap!
I'm planning on replacing the head unit with a Pioneer DEH-4000UB and using a modifry DCI interface to retain the dash controls.
I'd like some help with speakers, can anyone recommend a set that are known to fit. Am I best getting coaxial and retaining the existing tweeters or should I replace these as well.
Also the car has Honda fitted headrest speakers. Should I try to replace these or keep them.
Sorry for all the questions but this seems a minefield to me!
Cheers
Martin

 

I just installed alpine 6.5 type r speakers in mine and am very well pleased. Check my post on the install. The sound quality is 1000X better and I"m still using the factory head unit.