i think ur wrong there, my 6.5 splits run way better off an amp, worth doing so.
The reply was with regards to his choice of splits, not speakers in general.Sending them an amplfied signal from the same source, will not improve the quality itself.I guess i could have elaborated a bit more.
With any audio upgrade, you want to ensure you are getting the most out if it.
Without an upgraded source, amp, deadning, correct installation ect, then you can't expect any speaker to perform at it's best.It would be like getting a new cam, but without a tune to suit.This is why his aftermarket speakers, don't sound as good as he was most likely expecting them too.
This is why i'm always trying to get the point accross to people that as far as value for your dollar is concerned, a speaker upgrade shouldn't nessacarily be the first on your list.There are gains to be made elsewhere whilst still retaining some of the factory components.
I'm not saying there is no point in upgrading your stock speakers, only that for the money most people typically spend, it could have better spent elswhere.A $150-200 aftermarket head unit, with stock speakers, would outperform a stock head unit, running $150-200 speakers.