ok so i have a JL audio 10w1v2 which is a 4 ohm sub. the amp that i have is a JL audio e1200 amp. now the amp is rated at 120 watts at 4 ohms and 200 at 2 ohms. right now it is hooked up in the 4 ohm configuration but i can also hook it up as a 2 ohm configuration where it will be putting 200 watts to the sub. now my questions are.
1. what are "ohms" and what do they do?
2. will it be safe to run my sub which is a 4 ohm one on the 2 ohm setting?

thanks. sorry im kinda a newbie to this kinda stuff. thanks again

its confusing to me but you can read here

http://www.the12volt.com/info/diagrams.asp#cal

very good info

i woulod also like to see somone answer this question

Thats a single voice coil sub, so how do you plan on dropping it down to 2 ohms?

In general I would drop it down to a lower resistance and give it more power, but Im not sure how to do that unless it has multiple voice coils

so basically, if i were to change the configuration, it will not get any ouder since i only have a single voice coil. am i correct? and also, i wont be hurting the sub in any way correct?

i dont tihnk you will be hurting the sub man.

Thats a single voice coil sub, so how do you plan on dropping it down to 2 ohms?

In general I would drop it down to a lower resistance and give it more power, but Im not sure how to do that unless it has multiple voice coils

you have a single VC. you cant change configurations even if you wanted to, unless you can perform a miracle and add another VC. Or you can just buy another sub and wire them in parallel to achieve 2ohm load.

even though this might be technically wrong, I like to think of ohms as resistance. The higher the ohms, the more resistance their is to a current of power. That is why amps give more power 1ohm>2ohm>4ohm. The lower the ohm, the less resistance/ more open for current to go through.

Oooook, check it out. Ohms Law 101:

Ohms are a measure of resistance between 2 points. Subwoofers and speakers are rated at certain ohm loads. Most regular door speakers are 4 ohm speakers. Subwoofers can be many different ohm loads, and you would buy certain ones based on how many subs you are hooking up and what kind of amp you are hooking them to. Some subs are 4 ohms, some 8, then you have dual-voice coil subs, which means that it may have dual 4 ohm coils, dual 2 ohm coils, some even have oddball dual 3 ohms.

When you read the amp and it says that it puts out 100 watts at 4 ohms, this means that if you hook up a 4 ohm load on it, it will put out 100 watts. If you have a 4 ohm sub, there is no physical way to hook it up at 2 ohms, the sub is only 4 ohms. If you had 2 - 4 ohm subs, then you could hook them together in parallel (meaning the positive terminals are together and the negative terminals are together). 2 - 4ohm loads in parallel would make a 2 ohm load. So, if your amp does 200 watts @ 2 ohms, and you hooked up 2 - 4ohm subs in parallel then you would be putting out 200 watts, but you would be putting it out to 2 subs, so each sub would get 100 watts.

Bottom line is, you dont change the amp to put out different ohms, the amplifier has nothing to do with the ohms. The ohm part depends on WHAT you hook up to it. The lower the ohm load, the more the power the amp will put out. Problem is, most amps are not stable below certain ohm loads (depends on what kind of amp it is). Most 2 ch amps are not stable below 4 ohms when bridged (thats a whole new topic there, ask if u wanna know). Most mono (single channel) amps are not stable below 2 ohms. Again, it all depends on what you do with the amp as to which one you should buy.

Hope this helps and didnt confuse you more than help you out. If you have questions, ask. I'm definitely not Mr. Knowitall when it comes to this, but I DO do it for a living. I'll help clear something up if I can.

I said all that to say, if you have 1 - 4 ohm sub, you cant hook it up anyway but 4 ohms. The 2 ohm configuration is for multiple subs, or a dual voice coil sub, etc. 120 watts is all you can do!

Haha, looks like I just said the same thing he did, took me a while to type it, lol!! Sorry!

Thats what I was saying. He cannot drop the resistance with hois sub, since it is a single VC.

thats why i quoted you. :silly:

ahhhhh i now know. thanks alot guys.

Dropping ohms puts the amp more in danger than the speakers. Less ohms = more power. More power = hotter amp. I knew a guy who ran 12 15" Fosgates on 2 Punch 45's. That's 90 watts of total power. Until you start dropping the ohms. When all was said and done, he was pushing about 250 watts into each 15, and the Punch could have melted an igloo. Those old Punches were nasty.

Thats what I was saying. He cannot drop the resistance with hois sub, since it is a single VC.

OMG!!! duh..theres more than one way to lessen the load (ohms). TRue, he is limited by the fact that is a Single Voice Coil sub (i don't know the sub, just taking yur word for it)...so you can't wire the sub down to 2 ohms. But..

Bridging the amp (assuming its got atleast 2 channels and is stable at 2 ohm) aka. combining the two channels Halves the resistance the amp sees..and therefore makes more Power=probably around that 200 watts that JL claims.

Take a positive from one channel, and wire that to the positive terminal on the sub. Now take a negative from the OTHER channel and wire it to the negative terminal on the sub. Usually, these are the two outermost channel terminals.

and voila! instead of having to send power to TWO channels, the amp is functioning as if it only has ONE channel, making more power, lowering the impedance, and making the amp not have to work as hard (because it has more power at its disposal). Only downside, is yes, it will heat up more quickly.

That just bridges the power, and doesnt change the resistance ( I am pretty sure). Just beacuse you bridge the amp it doesnt mean that you change the resistance.

That just bridges the power, and doesnt change the resistance ( I am pretty sure). Just beacuse you bridge the amp it doesnt mean that you change the resistance.

exactly, that doesnt have to do with ohms. that just means that you are using the power of two seperate channels for one speakers. obviously if you have say 75w x 2, then bridge will mean ~150w x 1.

The amp doesnt have to be stable at 2 ohms in his case. He has a 4 ohm sub. When you bridge the amp you arent changing the ohm load at all, you are simply combining the power of both channels, therefore putting out more power at 4 ohms when you bridge than you would if you just put the 4 ohm load on 1 of the channels.

Original Poster:
you have an e1200, which is a MONO amp (one channel)... you're stuck at 4ohm since you have a SVC 4ohm sub.... there's no way to get 2ohm or more than the 120 watts out of that setup....

Original Poster:
you have an e1200, which is a MONO amp (one channel)... you're stuck at 4ohm since you have a SVC 4ohm sub.... there's no way to get 2ohm or more than the 120 watts out of that setup....

well, this answers the question. If it IS a mono amp, then you are limited (to 4 ohm configuration)...

But..HELLOO noobies!!!!!!!! Bridging the AMP HALVES the resistance/load (ohms) therefore allowing the amp to make more power!!!

eg. an amp will be rated: 200x2 Watts @ 4 ohms. THis Means the amp puts out 200 watts into 2 channels at 4 ohms.
Now watch... 400x1 watts @ 2 ohms.. this means the amp CAN put out 400 watts to ONE channel if you BRIDGE The channels!!! Did you ever notice how
the power goes up as you BRIDGE THE CHANNELS?!!! Lets see, is it more EFFICIENT to power 2 channels, or just 1?? EXACTLY..1!!! which is why the amp sees a lower resistance and will put out more power!

DUH!.. omg, i can't believe i just had to explain that. Thats just the kind of thing that you can figure out on your own..really makes me wonder about some of you people.

Original Poster:
you have an e1200, which is a MONO amp (one channel)... you're stuck at 4ohm since you have a SVC 4ohm sub.... there's no way to get 2ohm or more than the 120 watts out of that setup....

well, this answers the question. If it IS a mono amp, then you are limited (to 4 ohm configuration)...

But..HELLOO noobies!!!!!!!! Bridging the AMP HALVES the resistance/load (ohms) therefore allowing the amp to make more power!!!

eg. an amp will be rated: 200x2 Watts @ 4 ohms. THis Means the amp puts out 200 watts into 2 channels at 4 ohms.
Now watch... 400x1 watts @ 2 ohms.. this means the amp CAN put out 400 watts to ONE channel if you BRIDGE The channels!!! Did you ever notice how
the power goes up as you BRIDGE THE CHANNELS?!!! Lets see, is it more EFFICIENT to power 2 channels, or just 1?? EXACTLY..1!!! which is why the amp sees a lower resistance and will put out more power!

DUH!.. omg, i can't believe i just had to explain that. Thats just the kind of thing that you can figure out on your own..really makes me wonder about some of you people.

Im sorry but your the biggest n00b in the world!!! :loser:

I just looked up a random 2channel amp for specs. Its specifically says

CEA2006 Specifications:

• 125 Watts x 2, at 4 ohms
• 380 Watts x 1, at 4 ohms BRIDGE

Look up any amp and thats what it will say. Some people really have nothing better to do than try to pass their stupidity onto others.
:loser:

Its the configuration of the voice coils that determines resistance. Go read up before you try to sound smart. :no:

200x2 @ 4 ohms. 200 watts per side at 4 ohms.

300x2 @ 2 ohms. 300 watts per side at 2 ohms.

600x1 @ 4 ohms. 600 watts when the amp is bridged.

Sciontist, according to your explanation, the amp would put out 400x1 at 8 ohms, not 2. If you are going to simply add together each channels output, you must also double the load that the power was rated at.

If, you run it from 4 ohms on 1 channel, to 4 ohms bridged, the amp would be basically 2 ohm stereo added together.

thank you, the stereo man had come to put the infidels into their place.

eeeehhhh! wrong! haha... asking the amp to power one channel instead of two halves the resistance the amp sees. Doesn't matter How many voice coils the sub has.

If "bridging" the amp just combined the two channels to make more power and RAISED THE IMPEDENCE...what would be the point!! NO ONE EVER RUNS AMPS AT 8 ohms!!! the dropping of the load/resistance/ohm (going from 2 channels to one channel) is what raises the power. iF bridging increased the resistance..it would make LESS POWER!!


Larry Bird..You get to 4 ohms bridged if you have two 8 ohm subs (or dvc subs wired in series to 8 ohms)...then bridge the amp (aka. run a speaker wire from a positive terminal on one channel to BOTh positive terminals on each sub. then run another speaker wire from the negative on the other channel to the negative terminals on each sub) VOILA!!

the amp is bridged.. running at 4 ohms! making the most power possible

mandos...i THOUGHT you were some kind of stereo expert, but i've lost a lot of respect for you based on some of your recent posts. In fact, i've never even HEard of ED.. ImHO you got your tc, then went to ED and pitched an idea to be their link to scion owners...you know a way to unload some of their equipment..which you seem to have done a fairly good job of. I'm not questioning your salesmanship, just your technical know how... no offense though.

eg. an amp will be rated: 200x2 Watts @ 4 ohms. THis Means the amp puts out 200 watts into 2 channels at 4 ohms.
Now watch... 400x1 watts @ 2 ohms.. this means the amp CAN put out 400 watts to ONE channel if you BRIDGE The channels!!!

:loser: You really don't get it do you?? YOU ARE WRONG. I'm not trying to brag, but for credibility sake, I'm a first class certified installer, have been installing for years and I'm about to graduate as a certified electrician...I put together and take apart amplifiers all day long. Mandos is perfectly right...its is you that we should be questioning.

Your above statement is so wrong its not even laughable. You said that no one runs amps at 8 ohms, that shows how much you know right there....a sentence spoken by someone who obviously does not have much experience in the area. Especially since distortion levels are lower at higher impedances, it is much much cleaner to run an amp at a higher impedance such as 8 ohms vs. 4 ohms. DUH. There again, you're probably one of those who doesn't know what "clean" sounds like...you probably just like "loud" and truthfully can't tell the difference.

But getting back to your above statement...if an amp is rated at 200x2@4 ohms like you said above, then it would also be rated at 400x2@2 ohms...as everyone knows that most 2 channel amps are stable down to 2 ohms when run stereo (using both channels). If an amp is rated at 400x2@2ohms, then it would be rated at 800x1@4 ohms bridged...not 400x1@2 ohms bridged as you said above. Don't believe me?? Go pull up the specs on a common 2ch amp...

Yeah, you're the expert...that much is obvious. You ought to try listening instead of making stupid comments on how someone has lost their credibility with you (like your opinion is important to everyone on here). And nice job showing some immaturity by using this thread to try and tell Mandos what you think about his personal endeavors with ED. Who asked for your effin opinion? Mandos was dead on. And aside from our bickering...the original poster has a mono block amp. There is no such thing as bridging in his case, so all our arguing isnt helping the original question at all.

^^^ +1 Craig... :clap:

that's why I simply posted this and nothing else in reguard to this "noooob...OMG"(mocking the_sciontist)



Original Poster:
you have an e1200, which is a MONO amp (one channel)... you're stuck at 4ohm since you have a SVC 4ohm sub.... there's no way to get 2ohm or more than the 120 watts out of that setup....



and BTW: mandos could school 99.8% of the people on this board when it comes to anything audio related.....

You'll love that JL W1v2.4, it's a great speaker.. I have the 12" with about 250watts going to it and it sounds awesome. It's actually slightly louder then the older model w3 12" that I use to have.

HA!! The only thing you said that was rite, is that the OP is limited by his mono channel amp. YOU guys are obviously NOobs when it comes to wiring, amps and impedance... in the dozens of systems i have installed/wired/fixed, i've never met any two people as clueless as you two. have fun trying to figure out car stereo! ha ha ha ha ha ha ha haha...

Yes, of course.... all the go-to people on ScionLife are incoherent retarded _______s and you are the god of car audio, your ____ doesn't stink, you are a genius, you know EVERYTHING and you never make a mistake.....


now that I'm done spewing bull____ out my ears, I'm going to say this: Sciontist, I think you know the concept you're talking about, but perhaps should be more clear in what your thought process is.. (other than "gawd, youz ppl r newbs"...) maybe in reality we're all thinking the same thing but you're just saying it in a way that sounds incorrect..... ??? who knows, just a thought...

eeeehhhh! wrong! haha... asking the amp to power one channel instead of two halves the resistance the amp sees. Doesn't matter How many voice coils the sub has.


You ended being correct at that statement.

Yes, if you run an amp at 4 ohms bridged instead of 4 ohms stereo, it does halve the impedance to each channel.

But that makes it 2 ohms per channel, 4 ohm final load. It is NOT a 2 ohm final load no matter how hard you try to make it sound that way.

It sounds like you do have a basic understanding of how it works because of what I quoted above, you just seem confused as to how it ends up making power after that.

mandos...i THOUGHT you were some kind of stereo expert, but i've lost a lot of respect for you based on some of your recent posts. In fact, i've never even HEard of ED.. ImHO you got your tc, then went to ED and pitched an idea to be their link to scion owners...you know a way to unload some of their equipment..which you seem to have done a fairly good job of. I'm not questioning your salesmanship, just your technical know how... no offense though.

Finally, as for this statement, could you please be more wrong?

I've owned eD products much longer than my tC. I was set up for an interview at eD before and then totaled my Neon. Got a tC and came down. Ben was already a SL sponsor. Yes, I DID get him to stick around here, if it weren't for me eD wouldn't sponsor SL at all.

Also, how often do I go through peoples threads to tell them to buy eD stuff? Only if they request info about it will I post about it. It's consumers that have purchased products through us that suggest it.

Yes, of course.... all the go-to people on ScionLife are incoherent retarded _______s and you are the god of car audio, your poop doesn't stink, you are a genius, you know EVERYTHING and you never make a mistake.....


now that I'm done spewing bull____ out my ears, I'm going to say this: Sciontist, I think you know the concept you're talking about, but perhaps should be more clear in what your thought process is.. (other than "gawd, youz ppl r newbs"...) maybe in reality we're all thinking the same thing but you're just saying it in a way that sounds incorrect..... ??? who knows, just a thought...

No no, not ALL the people..just MOST. I'm no God...I'm the KING of car audio! :bow:

Yeah, i know my concepts, and have NEVER ever had a problem with car stereo, nor have any of my customers complained or had any problems with their systems.

I have a feeling we're all thinking along the same lines, just some of us are a bit confused..or are not properly explaining themselves.. OR are just spewing to much mumbo jumbo techno jargon that confuses EvERYONE and makes this whole thread useless. SOmetimes two people can read the same thing and see it differently.

But when you go from using TWO channels of an amp, to ONE channel... YOU're HALVING the load/resistance. NOT DOUBLING IT!! What would be the point of combining two channels if that amp sees a Greater REsistance??!!!! Lower resistance = more power. Bridging an amp= more power/wattage. Bridging an amp = lowered resistance (tradeoff is heat buildup and less stability at lower ohms..and more chance you're gonna fry something).

Period. the end. The king has spoken....."its good to be the king"

mandos...i THOUGHT you were some kind of stereo expert, but i've lost a lot of respect for you based on some of your recent posts. In fact, i've never even HEard of ED.. ImHO you got your tc, then went to ED and pitched an idea to be their link to scion owners...you know a way to unload some of their equipment..which you seem to have done a fairly good job of. I'm not questioning your salesmanship, just your technical know how... no offense though.

Finally, as for this statement, could you please be more wrong?

I've owned eD products much longer than my tC. I was set up for an interview at eD before and then totaled my Neon. Got a tC and came down. Ben was already a SL sponsor. Yes, I DID get him to stick around here, if it weren't for me eD wouldn't sponsor SL at all.

Also, how often do I go through peoples threads to tell them to buy eD stuff? Only if they request info about it will I post about it. It's consumers that have purchased products through us that suggest it.

that's me!!

eeeehhhh! wrong! haha... asking the amp to power one channel instead of two halves the resistance the amp sees. Doesn't matter How many voice coils the sub has.


so you're trying to say that if you have a SVC 4ohm sub, and you hook it up to a 2channel amp (bridged mono), the amp will be "seeing" a 2ohm mono load???

if that's what you're trying to say, I'd have to disagree.... the amp would be powering mono @ 4ohm final impedance.... like Chris said, it'd be 2ohm per channel, but since the channels are combined(bridged) it's a 4ohm final load (because that's what the sub is)

If you have 2 2ohm SVC subs running 2ohm stereo on a 2channel amp, then want to run it mono, you could wire your subs to make a 1ohm final impedance or a 4ohm final impedance depending on series or parallel wiring....

on almost all 2channel amps, stereo 2ohm would = mono 4ohm in terms of power...

Wow..You are quite misinformed SCI TC GUY.. Maybe cuz you're only 20...hopefully in another 5 years you'll GET IT.

I really don't care if thats what you think..You OBVIOUSLY have NO idea what you are talking about. ha haha haha. thats fine..

If you have a SVC 4 ohm sub and a two channel amp, you could: a)use ONE channel to power the sub at 4 ohms at say 200 W. OR you bridge the amp (use a pos. from one channel and a neg. from the other) and have a 2 ohm load at 400 watts.. THOUGH THE SUB is still a 4 ohm load...YOU're SPLITTING the load between the two channels, halving the load the amp "sees". YOu don't NEED a DVC sub to wire in parallel or series off the AMP!

I'm Done.

on almost all 2channel amps, stereo 2ohm would = mono 4ohm in terms of power...

HA! THis is ABSOLUTELY the most ridiculous thing i've ever heard!!! THis just makes NO SENSE!! Stereo means using 2 channels, mono means combining to one channel, Just so YOU know! You contradict yourself left and rite..and you don't even SEE IT! :rofl: :rofl: :rofl: :rofl: :ttth: :loser:

He's not contridicting himself, you are agreeing with him and saying it completely wrong.

4 ohm bridged = 2 ohm per channel, same power, just in 1 channel instead of 2.

You are saying the exact same thing, and then disagreeing with people who say it in terms everyone else understands.

Please, for your own sake, stop making a fool of yourself.

...If you have a SVC 4 ohm sub and a two channel amp, you could: a)use ONE channel to power the sub at 4 ohms at say 200 W. OR you bridge the amp (use a pos. from one channel and a neg. from the other) and have a 2 ohm load at 400 watts...

that's exactly what I said.... a SVC 4ohm sub wired to a 2channel amp is 2ohm STEREO... which = 4ohm MONO....

yes the amp will "see" a 2ohm load from that one channel... and a 2ohm load from the other channel.... but since it's ONE SVC 4ohm sub, the FINAL impedance is 4ohm MONO.... everyone knows that if you take a 4ohm sub on one channel, and wire it to both channels, you'll get more power because you're using both channels.... but you WILL NOT GET A 2 OHM MONO LOAD!!!!!! you'll have a 2ohm STEREO load that is actually technically a 4ohm mono load because the amp is bridged to ONE sub......

a 400x1@4ohm (that "x1" means mono/bridged/2into1) amp will give you 200x2 @ 2ohm..... the 200x2@2ohm is the reason you can get a 400x1@4ohm... when you hook up a SVC 4ohm sub to 2 channels (bridge the amp) you're giving half the resistance of the whole sub to either channel... meaning 2ohm STEREO at the amp... but since it's not technically a stereo setup, it's MONO... and since you can't change the impedance of a sub, it's 4 ohm MONO (bridged)

Since the original posters question was answered long ago...and this is just going to go back and forth....locked.