jstandfest

I can get a pair of either one of these for $55-60 and I'm looking at replacing all 4 stock speakers in my SCrew.

Which one of these would be better?

Tallyman89

Can only speak for the Polks. I have them in my rear door and I really like their sound. I know many here like Infinity. If you are powering off of factory HU get the most efficient in db. Higher the db the more efficient the speaker and less power needed. Can't go wrong with either.

atxval

If you don't have a sub to compliment them you may want a speaker that can play more of the low tones. That being said I love my Polks but I do have a sub.

88mm

i have the infinitysin my font. My opinion is a slight upgrade in sound when using a factory Head unit. Once amped and crossed over a def improvment.
My issue is that the Lower mid bass lacks and also distorts and gets muddy in that area and lower mid range area.
I find If i x-over at about 100hz sounds pretty good but not great as i miss some of the bass guitar and that is then moved to the back to the sub. so the sound stage is kinda messed up with that.
also my right pass tweeter distorts/ I dont play it crazy loud either.
Anyway. It may just be me and my set up but not too impressed and I really want to like them.
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Note I may need to treat my doors panels with sound deadening material / this may help with my muddy distorting midbass and lower mid range.