2000 Camry XLE stereo question

[MrToilet]

I have a 200 XLE with the JBL Premium Sound system, 6-disc changer, etc - I just replaced the double-DIN headunit with a Kenwood (I was getting sick of using a tape adapter for my Ipod, hehe).

I hooked up the two harnesses, bypassing the JBL amp, everything is working just as it should be; but the sound is MUCH "thinner" and seems to be pushed further to the rear speakers. It seems like the tweeters in the doors are softer, and I don't get near the bass that I'm used to. I understand the JBL speakers tended to be a little heavy on the bass, but I was used to it, I guess.

Anyway, my question is whether there is any way to use all 6 speakers? My Kenwood deck has a high pass filter, is that all I need to change? I've been playing around with the equalizer, and while I can adjust the sound a little bit, it doesn't sound anything like what it did with the Toyota headunit.

Or can I run the pre-amp outputs from the receiver to the amp? It's supposed to be behind the glove box, right? And how do I get back there?

Thanks for any help.