Upgraded from factory to Alpine CDE-9846, but 2loud!, what happened? speaker+heatunit mismatch? Options

[JediFonger]

i've got a '99 Toyota Celica GT. i hated not being able to play mp3 CDRW's/CDR's, so i upgraded haphazardly because i was also installing a new alarm system yesterday.

http://www.alpine-usa.com/en/products/prod...?model=CDE-9846
^got that installed yesterday. i didn't have a chance to demo it much last night when i picked up the vehicle... but this morning, i tried playing stuff. the unit plays all the way upto 20+ in terms of volume... but anytime i approach 4 or 5, all of my speakers are distorted. it's 16w RMS, what the heck is going on? i didn't upgrade anything else, ONLY headunit. it's just 2much power and overbearing. the speakers are distorting like crazy if i play too loudly. i can't get a clean sound, loud sound, just muddy sounds. what could be at fault?

i don't have $ to upgrade to new speakers... i just wanted the capability of mp3 playback, which it does.

[JediFonger]

the installer told me that there is no rca input on the factory amp, that's why he wired speak outs into the plug in the first place.

while the factory speakers are pretty good in of itself, i'll be needing new speaker+amp anyway. does anyone know the default amp anyway? just curious. the alpine's 16w rms sounds much more powerful than the factory one. i can also hear the highs, it's just so much more defined.