Prius audio problem after replacing speakers

I have a Prius 2011 with navigation (non JBL) that I bought recently. I didn't like the sound of the original speakers so I replaced the four speakers in the front with a Focal IS690TOY set which comes with two 6x9s for the front doors and two tweeters for the dash. They are plug-and-play compatible so they were very easy to install. They are supposed to cover frequencies from 50-20000Hz.

The result puzzles me. I now get a very nice and clear treble, very low bass (the doors are vibrating) and no mid tone. By adjusting the fader, I get the mid tones from the rear speakers and it actually sounds pretty good even though the mid tones now comes from the old low quality Toyota speaker. If I "push" the fader all the way to the front, there is only bass and treble.

The focal speakers are supposed to have a built in crossover. So to my question; Is there a crossover in the Prius that separates the signal to the dash and front door speakers? If so, where is it located? My thought is that if there is a crossover, this may send the mid tones to the wrong speaker. The dash speakers (tweeters) are much smaller than the original Toyota speakers. Any other ideas about what may be wrong?

I have sent an email to the web shop where I bought the speaker set, but the only answer I have received yet is that it will take long to get an answer from them because their support are heavily backlogged (Norway is shutting down the FM network this year and a lot of people are now installing DAB in their cars).

 

Yes please. That would be very nice of you, but I'm not allowed to post my email address on this forum. It is a com address with my first name in front of the 'at' and my second name after.

 

No, I did not. Please try again. The address is baard followed by at followed by riiber then a dot and com at the end.

 

Some additional information: After talking to the people that sold me the speakers I have found that these speakers have a crossover frequency of 4500Hz. They said I can lower this to 2000Hz by replacing the capacitor on the tweeters. I have also talked to Toyota. They did not know what a crossover is and had very little information. The only new information I got from them is that my car has a separate amplifier. I thought it was only the Prii with JBL that had a separate amplifier. The big question now if whether this amplifier has separate outputs for for the dash and door speakers.