I have read that factory-installed stereos often put out 15 watts RMS per channel or less, while after-market stereos often put out 16 watts RMS or more. I am would like to know into which camp the stereo falls as shipped by Honda for the 7-speaker system.
In choosing replacement speakers, you might want speakers with high sensitivity ratings (over 90 dB) for the lower-powered stereos, versus speakers with lower sensitivity ratings for the higher-powered stereos.
This Honda specifications page for the 4-Speed Automatic 4WD EX says “270-Watt AM/FM/CD Audio System with 7 Speakers including Subwoofer”. How does that breakout to power delivered to the speakers in the front doors and rear doors?