lctaylor1

I want to change the rear door speakers in '99 GS4 w/NAK system. I know the OEM is a 4" mid speaker. I want to upgrade to 51/4" two way speaker. Are there any OEM crossovers for the rear that will prevent me from getting highs out of my new two way spekaers? Or can I just install them and be okay. I want to make whatever changes I need while stuff is taken apart. I would hate to install them, put everything back together and not get any highs out of the tweeters of my new speakers.
I am thinking there is only an internal highpass crossover in the factory amp, which would work great. Just want to be sure.

Thanks for the help.

NT2SHBBY

This belongs in the audio forum, but I'm going to chime in...

True audio fanatics will tell you that rear tweeters don't produce good quality sound and are not SQ show quality.

You should keep your components up front only....rears should be able to take as big as 6.5" with some modification.

LEXUS_KID

iTrader: (4)

6.5 will not fit in the rear doors without major modifications and if you want to mount tweeters in the rear mounting them in the doors is ok or you can mount them in A pillar if you want true surround your going the right way but if you want a bass mobile then you don't need tweeters in the rear just a good strong mid-bass will do the trick