I used kicker speakers in my van that had a factory AMP and it sounded amazing! I am not sure if the Kicker's would be too stong for this model. Also can this car handle a small AMP if needed? The battery is pretty small. Looking for better sound, not a big sub that would shake the windows even though that would be cool coming from a prius.
Walmart https://www.walmart.com/ip/Compatible-with-Toyota-Prius-2004-2009-Factory-Speaker-Replacement-Kicker-Bundle-2-DSC65-Harmony-HA-A400-4/833255286