Ok so the amp I want says 125x2 RMS @ 4 ohms

The subs (JL 12W0) also handle 125 watts RMS each at 4 ohms

does this work? or would it not work because the total ohm load for the subs is 8 ohms

Then, I emailed this guy on his ebay auction for 2 8-ohm subs. he said the total ohm load for 2 8-ohm subs is 2 ohm.... that totally confused me. The more ohms the more resistance right? So it would be better to have less resistance right?

Any help would be greatly appreciated. Thanks.

 

go to www.crutchfield.com i think there is a description of wiring techniques and ohm loads

or maybe www.howstuffworks.com

ohm depend on how they are wired.
you have 2 4 ohm subs,

wired in series you would have 8 ohms
wired in parrellel you have 2.
each wired to their own channel would give 4 on each channel

 

crutchfield application only applies to mono amps. you have a stereo 2ch amp.

once again:

if you have (2) speakers wired to 8ohm each, then bridged on your amp, you will have 2 ohm load

if you have (2) speakers wired to 4ohm each, then bridged on your amp, you will have a 1 ohm load.

this is for 2ch stereo amps.

 

i found a good link http://www.jlaudio.com/tutorials/wiring/index.html

 

thats also for mono amps

 

amp is 125x 2 at 4 ohms...that's two channels. your sub is 4 ohms each. hook each sub to each terminal of the amp. amp will be playing at 4 ohms.

 

or you can series-bridge your (2) SVC speakers and run the amp @ 2ohm mono

 

crap i need to read this stuff before i post it.

 

From amp: right+ -> left speaker+ then left speaker+ -> right speaker+

From amp: left+ -> left speaker- then left speaker- -> right speaker-

This is how 95% of amps bridge. This will give you a +2ohm load from the amp to a -2ohm load that the speakers provide! Problem solved assuming you want to bridge them (which you do. Stereo subs sound SHITTY!)

P.S. if that amp does not say bridgeable anywhere in the instructions DONT DO THIS! If the amp is not bridgeable (which means it can be made from 2 channels [stereo-like normal speakers] to 1 channel [mono-like subs]) then don't buy the amp. Only a bridgeable amp is intended for subs.

 

"amp is 125x 2 at 4 ohms...that's two channels. your sub is 4 ohms each. hook each sub to each terminal of the amp. amp will be playing at 4 ohms."


is this correct?

 

Yes but your subs would be in stereo. The last thing you want is subs fighting each other for the space rather than playing the same thing. Trust me and look above to bridge them!

 

huh?

this is even confusing for someone that knows how to wire this up.

 

I'm bad with words...but if i could draw this out trust me it would work lol

 

heres the amp and subs im looking at... anyone have any suggestions?
amp:
http://cgi.ebay.com/ws/eBayISAPI.dll...category=39736

subs:
http://cgi.ebay.com/ws/eBayISAPI.dll...category=39771

 

Most amps bridge by reversing the polarity on one channel and floating the ground. Therefore, you wire the sub to both of the (+) sides of the amp, and DO NOT USE the (-) side!!! You could fry some stuff! I have seen a few amps that just reverse the polarity at the outputs, and you use the (+) on one channel, and the (-) on the other channel.

Those subs and that amp don't really match.

 

i would not buy that amp. warranty is done on that. plus, pioneer amps dont do shit for subs. the speakers also dont look that good.

spend a few extra dollars and buy new; used inexpensive stuff will sound like used inexpensive stuff. save your self the headache of used car audio.

 

I wouldnt go with the w0's they pretty much suck in my opinion id save up and do it rite the 1st time. My best advice go to a local car stereo shop and listen to different amps matched up with subs. When you find something you like get all the model#'s, research the net see if its cheaper. If it isn't just buy it from the stereo shop. Go with what fits both your ear and your buget.

 

tru tru.... can someone explain to me why the amp and the subs dont match? sorry im just a newb tryin 2 lern

 

first, that amp is not enough power for subs. second, that amp is about 2-3 year old model. no manufacture warranty. new models are going for like $50 more, more wattage. the subs are below mediocore.

 

All 2 ch amps should be bridged to mono for sub applications to ensure the highest output and to ensure the matching level of the subs. The amp you choose is 380 watts @ 4 ohms. The subs you choose are 4 ohms each. The two subs in parallel would equal 2 ohms, a load too great for that amp (IE you'd burn the shit up). You could wire the subs in series, which would equal 8 ohms but that would pull you down to only 250 watts. You need an amp and sub combo that matches impedence.

 

I disagree. I think the W0's are awesone for the price you pay. I had 2 12's and they slammed harder than most of my friends subs. They only say 125W RMS but I think it can push a lot more than that and still sound good.

 

I agree with dennis here. The best system i ever had in a car was in my camaro. It has 2 10" W0s and a rather large amp (can't recall the exact number, but i know they were pushing more than 125W RMS. These are not bad subs, however the amp is cheep and i would just spring for a new one.

 

so... ok if i wired the 2 4-ohm subs in paralled i would get a 2 ohm load. How many watts would be ideal for a mono amp to be pushing in that situation?

 

also... stereo subs cn be wired for mono?

 

I had 2 JL w6's in my car with a 3000w Boss Class-D Amp.. (Yeh it doesnt push out 3000w supposdlly untill half an ohm).. Im sure its not pushing close to 3000 at half either, but thoose hit HARD and great quality subs.. youll never go wrong with JL's..

 

Depends on the subs usually. I have 500W through mine and they are fairly loud. Lots of people like it louder and go with the 800-1000W range, but you need much better subs to handle this power. If your crazy go get some $200 apiece subs and put 1500W through them. That'll be crazy loud.

 

so they say they handle 125 watt rms... so would it be good to get a 250x1 @ 2 ohm mono amp?

 

Yes sir it would work, but for those subs you want a bigger amp. Look for something at least 400W. I know people on here have put these subs down, but trust me. You wouldn't be ashammed to have W0s (unless the previous owner beat the hell out of them). But you will need at least 400W to get sound out of them. 250W would almost not even move the cone I'm good with this subs and ohmage stuff so if you ever need info you can pm me!

 

thanks 97Cl22.... but if its rated at a combined 250watt rms... would pushing more wattage hurt the subs?

 

p.s. The fact that they handle only 125W RMS can be overlooked. An amp with 500W won't even put out 125W RMS. RMS is basically continuous power. So if you were to run these things at -for example- 150W continuously they would blow. The 500W rating on an amp means it peaks at 500W. In reality most will never hit the peak power. A 500W amp or even probably an 800W amp would not blow these subs.

 

They really shouldnt blow unless you put a actual compertition amp to it..

I was running 2 12'' w6's and their rated at 325 rms..or so

and I had a monoblock 3000w D-class on them.. and I could turn it up till my speakers distorted without a problem..
JL's are very good for durabilty and power..

 

oh my god this is so over my head as a total complete newb, i need a mentor to just show me all this from the beginning

 

so was i.... this thread has helped alot..

so wat do u guys think of 2 8 ohm subs wired in parallel with this amp:

MTX Thunder 282

http://cgi.ebay.com/ws/eBayISAPI.dll...&category=3281

 

Yes this will do the trick with 2 8ohm subs. If either of you want to get the basics of car audio feel free to pm me. I'll tell ya everything you want to know!

 

I was too lazy before.

Here. Just about everything you need to know about wiring your subs.

http://www.jlaudio.com/tutorials/wiring/index.html

 

True they are the best subs you could buy for the price but the boxes are huge. Im not saying they dont slamm i had w0's also its just they bog out on certain frequencys. I had about the same amount of power running from an xtant amp with the box built to jl rec specs...i just dont like um anymore after i got my w6's they are way cleaner way louder and way deeper

 

Hey I've got an MTX 4122 that's pretty comparable to that ones power. It's 200 watts bridged to 4 ohms I think. I have the bench tested power sheet on it too, I can go check exactly what it puts out if you are interested.

I also have a 6500D that's 775x1 hehe.

 

Jls are good subs...i have 2 15 WO's. But i would not get that amp. i have a pioneer premier amp and i have taken it in a good 5 or 6 times. i won't ever buy a pioneer again.

 

proaudio... u sellin the amp?

 

Yea I'm sellin all da stuff I have. I'll pm ya bout it when I get home.