the speakers have amps on them and the amps have to powered up when u
turn the radio on  recheck the adapter wire kit u used it may not have
the power wires in it

There are 2 types of infinity systems I don't know when the cutoff is for
when
they switched.

Both systems use a head that supplies line inputs to an amplifier.  In the
older
and better system each speaker is individually amped with amps that are at
each speaker.  In the newer and crummier system there's a single amp that is
under one of the seats I think and that feeds all speakers.

The system you installed is probably a combo head/amp and is supposed to
be connected directly to the speakers.

In the older system you can use the existing wiring and remove all speakers
and
replace them with standard speakers.

In the newer system you can use the existing wiring and bypass the external
amp.

You will need a factory service manual to figure out which system you have
and what the wiring is.

Your adapter is undoubtedly for the NON-infinity Chrysler system

If you have the older infinity system your speakers and amps are good
quality and if you just get a better head and make sure you have power
to the speaker amps you will get good sound.

The Infinity systems are not easy to replace with a generic aftermarket
system.

Ted