If you are already pulling down the stock alternator adding another 60-80 amp peak load will defintaly pull it down.

The 100 amper might do it, but if they have a 180, why not...

curious...what kind of amps are you purchasing? i highly recommend rockford fosgate. they are so well built that they can take the torture of off-roading. many cannot. with these, you can also but amps that have far lower wattage ratings. there are so many lies in the stereo biz that it makes the lies in the jeep biz look like small in comparison. whatever you buy, make sure thay have been around a while.rob

yes rockford fosgates have been good amps in the past.. but lately their new stuff really isnt anything worth bragging about. they have become horribly inefficient, and for the price there are many other better amps out there. also, with a RF amp you will have to mount it out in the open and possibly elevate it a half inch to get good air flow becuase they get HOT!!.

anyways, i am getting a single Alpine V12 M605 mono block amp. it is 80% efficient (compared to the rockfords %60) which means that it will take less of a draw in power than most other amps but STILL put out just as much. also it runs cool. has built in fan (RF's do not) and is two ohm stable.
this amp puts out 600-650wRMS (depending on yoru charging system) @ 2ohms and @4ohms shoudl see around 400wRMS.
there ARE bigger amps out ther.e. but this one is my fav because it is big enought o really pump out the power and it is so efficient and you can hide it anywhere cause itll never overheat.

i used to have a rockford P8002 amp and it was horrible. LOTS of power, but killed my charging system, even with the famous capacitor (which honestly doesnt do much more than help a LITTLE bit with dimming and create that much MORE draw for your alternator). that amp put out 800wRMS bridged.. but later fried after running it at 2ohms.

i work in a stereo shop, have for the last year. i am the head installer and theres not much pertaining to stereos that i dont do. i have seen more rockford amps come back than i would like to mention.. but mostly it just because they were being run over their limits with not enough power getting into them.

on a scale of 1-10 rockford would be a 7 or an 8 while alpine would be a solid 8 or 9 as far as quality.
that is VERY high... Pyle would be a 4... sony rates in at a 5 in my book. and pyramid is a 2.
sure the pyramid, sony, and pyle might work.. but they are not CEA compliant and most often are not able to be bridged and really pump out any decent amount of power.

if anyone has any stereo related questions, let me know id be glad to help just as you guys are helping me with my jeep related questions.

Yeah nerve I have a question. Can you STILL hear normal conversation? If so why put all that hardware in your ride? One day you will be old like me and NEED your ears. You can sell all that stuff to the guys that will be deaf at my age from it but you do NOT have to put it in your own ride.. There is nothing that you need to hear that the stock system cannot provide.. Also there is nothing that you are listening to that the people in the cars around you give a damn about or want to hear!
Big JIm <img src="/forums/images/graemlins/pfft.gif" alt="" />
(no charge for the rants) <img src="/forums/images/graemlins/pfft.gif" alt="" />

that IS alot of music! i love my 8" bazooka bass tube, but it's not crazy like what all you're doing. it sounds great, takes little space and splices into stock easy but just won't quite hit that low sub note that rattles your spine at the base! hope you've got your mute button on the wheel, the fuzz is all about cell phones and sub bass around here. pretty much have to sell your system to pay the fine!!

My YJ had the Amp and Subwoofer (thumper stuff) in it when I bought it and I had to turn the Subwoofer Waaay down from where it was from the previous owner. My kids loved it, but my insides were getting rattled and twisted just running up to the store and my rear view would actually vibrate loose.
Amazing how powerful that stuff can be.

"There is nothing that you need to hear that the stock system cannot provide."
there is LOTS that i want to hear that the stock system couldnt provide. take a listen to pink floyd dark side of the moon in my jeep, and then listen to it in a jeep wrangler with the factory stereo and you will know what im talking about. in the beggining with a nic stereo setup you can hear him talking in the background saying he is not crazy and stuff... alsoa stock system has no where near the bass capabilities that a good setup has.

im not saying the bass has to be so loud that it makes it so you cannot hear anythign else.. but i do like loud and clean sounding music... which you can only get when you amp everyspeaker. when you amp the front speakers you need a larger amp for the sub to make it worthwhile (so you can still hear it).

let me just say i am not the loudest guy in my town, nor do i want or try to be.. BUT i do like to have agood quality sounding system.. something that i can turn up LOUD and have it not distort.

and to those guys who rattle all cars next to you.. its time to grow up. i do NOT play my system like that, nor does ANYONE that i work with. we all have nice stereos but we are all resonable with them. ALSO, as in all my previous cars, the jeep will be getting dynamatted. this greatly reduces noise inside and out and keeps the jeep sound tight.

so yes that amp is a lot.. but i like music loud. and no i do not play it with my windows down next to other people.
once you sit in a car with a nice sounding system, not just bass.. but nice all around, you will never want to go back. ive beend riving for the last 5 months without a high quality system and im going through withdrawals.

if you were a dentist, coudl you justify not having nice teeth? or an electrician living in a home with wiring that pops the breaker everytime you turn on the light and the heater? he woudl fix it cuase its his profession.. same way with me and stereos.

Try to remember that our ears come from hunter/gatherer ancestors. Our hearing is developed from guys just like us that had to listen for the BIG CATS creeping up behind them. Lovely, quiet woodlands is what our ears are expecting at all times. Nowhere in our history has our ears been developed to be enclosed in a car with the huge LOUD systems we have today. Not only you nerve but all you guys out there.. you WILL want and need your hearing in the future! Ruining your ears for a stupid music fad is a terrible waste. And yes you can listen to the factory system and ALL YOU NEED is there.
Guys, ears is serious stuff.
Big Jim <img src="/forums/images/graemlins/pfft.gif" alt="" />

Sorry, Big Jim....but with all respect I gotta disagree with you. Jeep road noise is so loud, esp. with no top and on the highway, that more volume is needed. Besides, I like my R&R loud. After 500 concerts, and unmeasurable hours of listening loud, my ears are in top condition. That isn't to say that discretion isn't in order. Be nice to the animals in the woods, respect others in general. Just an opinion....everybody has one. Rob