98 Toyota Corolla LE stereo

you'll probably have to hit a local stereo shop; you can get either a standard blade type holder or an AGL type fuse holder. The blade type holder will no doubt be cheaper.Life moves pretty fast; if you don't stop and look around once in a while; you could miss it.

Stop in at your local stereo shop, tell them you need an 8 gauge ring terminal, and ask if someone will look to see what size you need.  They'll probably have a choice with either a 1/4" inner diameter, or a 5/16" inner diameter hole.  You can even use a socket set to see what will work.My ex once told me I have a perfect face for radio.

I'm not sure how that works- 18 millimeters is nearly 3/4 of an inch, so I don't think that's it.My ex once told me I have a perfect face for radio.

before everything, i have a 98' Corrolla LE

I'm planning to upgrade my stock speaker system with a much more powerful one.......but before i ask about that i don't really understand much about certain specifications of speakers and want to know more about them before i drop a few hundred bucks on some..............at speakers i have looked at some say 3 channel and some four channel, i'm not really sure what that means, also RMS wattage...? i've seen speakers that are labeled 500 watt and 250 watt RMS......what is its meaning?? honestly i don't really know much about these specifications on them........like what things effect what in a speaker....?ohm resistance...........frequency, pretty sure thats the range of sound the speaker is capable of, does that have to do with the channels?RMS wattageamps......i sort of get what they are but don't get what qualities they effect in a speakers performance.......so could someone please collaberate for me?   

ok heres what i have and heres what i want.......

i have a 350 Watt sub woofer with an amp for it (350 Watt). i used an 8 gauge wire to power it from the battery and grounded it in the trunk. (thats where the the sub and amp are) i've been looking at speakers to get for it to replace the stock speakers i currently have installed.............mostly what i have been looking at are each four stock speakers being replaced by 500 watt speakers, attached to a 2000 Watt amp in the trunk.....is there some way to connect that 8 gauge with to like a power distribution block or circuit breaker and then reattach power to the 350 Watt amp and then another one to the 2000 watt amp for the speakers.....or is that waaaaaaay to much for an 8 gauge wire to handle......if it is i could probably run a smaller gauge wire ................and then could i wire the ground to the frame in the trunk? oh ya nd i've posted here before asking for help installing that sub........if any of the info on it helps heres the link to it.......... https://www.the12volt.com/installbay/forum_posts.asp?tid=65862&PN=1&get=lastthanks for reading my huge freakin post and please post!!! any and all comments/help is appreciated....