Factory speakers arent designed 2 sound good with subwoofers and so i recommend u buy new speakers from an audio shop! Kenwood, Sony, and Kicker SPEAKERS not subs r going 2 go good with ur subs, amp, and receiver!
They will sound cleaner at higher volumes but as far as being louder it's hard to say. If they are it's not going to be by a lot. Aftermarket speakers have a higher efficiency than factory speakers and a higher power handling. Therefore they require more power to sound they're best and don't normally do well off just head unit power. I suggest buying an amp for them to get the full potential out of them. Also don't go with cheap brands or you will be disappointed.
Would there be a significant difference if i where to replace the front and back speakers of my truck compared to the factory ones. I have a subwoofer and a amp and a aftermarket jvc stereo. Would there be a difference you can tell.The factory speakers sound good to me but would it sound better if i where to replace them