can 4 ohm sub do 2 ohms?

[Nitroxide 10+ year member]

probably a dumb question, but can a 4ohm sub do 2 or 1 ohms?

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[Speedyd718 10+ year member]

nope single voice coil can only do what the rating is. in your case 4ohm. if u add a 2nd sub u can wire it to 2ohm.

 

[Nitroxide 10+ year member]

thanks

 

[Nitroxide 10+ year member]

what is the difference between 2 and 4 ohms as far as sound goes (SQ, SPL).

 

[Speedyd718 10+ year member]

no diff in the resistance at the sub. but to the amp u typically get more power the lower the resistance.

 

[Nitroxide 10+ year member]

im getting a nine.1 and was either gettin an idmax 12 or a d6 12. if i get the idmax i wanna run it at 2 ohms, but if i get the d6 i wanna run it at 4ohms. i was just wondering if there would be a sound difference if i were to get a 2 ohm d6 compared to the 4 ohm.

 

[jughead]

Your amp will match whatever load you give it, with the way you wire the subs. So if you have an amp that is 1200w rms at 2ohm, then you have to get subs that can be wired to 2 ohms if you want the amp to run at its max output. Having dual voice coils just gives you more possible outcomes of how you can wire them.

 

[qtipextra 5,000+ posts]

Your amp will match whatever load you give it, with the way you wire the subs. So if you have an amp that is 1200w rms at 2ohm, then you have to get subs that can be wired to 2 ohms if you want the amp to run at its max output. Having dual voice coils just gives you more possible outcomes of how you can wire them.

This post is quite possibly the best, most useful, most helpful first post anyone has ever posted! Well done!

To original poster: this is correct. A sub doesnt take ohms, it not a power rating. A sub has a resistence, like when I push you, how hard u try and "resist" that push.

That is measured by ohms. I think u know about power rating, in watts. The amount of power from your amp depends on how hard your sub tries to push it back, in a sence. So when u have less resistence, say 1 ohm, your amp can "push" more power to your sub(s). If you have more resistence, say 4 ohms, then your amp can't push and send as much power to your subs. So it all depends on the way u wire your sub, or subs. To figure the ohm load, u use ohms law, which I will not go into. The more subs, or the more voice coils, the more ways u can wire them to get different ohm loads, so u can build your system the way u prefer, and to get the most potential out of your amp, and meet your amp requirements, because not all amps are are stable below 2 ohms. But when an amp is stable at loads that low, they can provide more power to that resistence.

 

[jughead]

Well put qtipextra

 

[dleccord 5,000+ posts]

not to jack your thread or anything but is it safer to set up your subs to a higher ohm than a lower ohm if you're not sure if your amp is 2 ohm stable? (i.e. 8ohm instead of 2ohm, though you safcrifice power)

 

[qtipextra 5,000+ posts]

not to jack your thread or anything but is it safer to set up your subs to a higher ohm than a lower ohm if you're not sure if your amp is 2 ohm stable? (i.e. 8ohm instead of 2ohm, though you safcrifice power)

Yes, runing your amp at lower impedence (resistence) levels then it is stable at can cause your amp to blow. If you dont know, its better to run it at a higher ohm load so you dont have to buy a new amp.

 

[dleccord 5,000+ posts]

if i have a dvc 4ohm sub, can i wire each vc to a bridged channel on a 4 channel amp ?

 

[killahbean 10+ year member]

use this as your guideline....

http://www.rockfordfosgate.com/rftech/wiringwizard.asp

and to answer your previous question, yes you can

 

[req 5,000+ posts]

too lazy to read it all, but there is no difference in sound, cept a lower impedance will typically yield more power, hence a higher SPL.

otheriwse, get a sub that matches the rated power at that resistance.

 

[dleccord 5,000+ posts]

well in the meantime i am still saving up for a mono amp and I have a four channel laying around that can only be bridge at 4ohms, anything under will damage it. so if I bridge the amp and if it see 4 ohms than i will give each voice coil 150wrms, thinking 300rms on the sub, which was rated for 400rms. so far rockford fosgate's nice sub wiring diagram couldnt help. cause its all based on single channel amps.