How many Amps can our cars sufficiently power before the need for a better alternator or what not, and of what power could these amps be?

i got 2....but i also have a cap....i got rockford 351m mono amp....rated 375x1@2ohm i believe...and i got a jensen 200W goin to my 6x9s...also i got a digital cap....my lights dont dim...my starting problem related to power wire conector...if you get a cap that will help somewhat but if you are gunna go overboard get a 160 amp or 200 amp from Ty...he has a couple

I have an 800 by 2 and a 140 by 2 with no cap and my lights barely flicker when the radio is turned up as far as it can reasonbly go without too much distortion

ok how can i easy say this more power is better i had just a red top m for a 600x1 amp (true power) bigger battery, cap, recommonded cuz the strain on the altnator and stock battery will fry it fast i had a 90 gp stock 100amp with just a old punch 250 i blew 2 altnator in 1 year

The stock alternator is only made for how the car is stock. The more draw you put on your battery the more strain it is going to be on your alternator. But you also got to take in mind on how you listen to your music. If you dont have the bass going no stop and loud, yes the alternator will last longer. But if you do the opposite you are going to get the opposite effect.