2 ohm vs. .5 ohm mono

[audioarsonal 10+ year member]

is it more efficient to run at .5 ohm vs 2 ohm?example 3000 watts at .5 more efficient then 3000 at 2? is there a difference in amp draw.i am looking for db's can anyone help

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[Atimm693 10+ year member]

At .5 ohm the amp produces more power, therefore im assuming there would be more current draw.

 

[PhatTonyDeMarco 5,000+ posts]

Theoretically, 3000w @ half an ohm would draw less current because there is less resistance, therefore the amp would have to 'work' less in order to produce the power.

But it is dependant on the amplifier, every amp varies with efficientcy.

 

[hardhitta47 10+ year member]

Theoretically, 3000w @ half an ohm would draw less current because there is less resistance, therefore the amp would have to 'work' less in order to produce the power.
But it is dependant on the amplifier, every amp varies with efficientcy.

No. Ohms Law man. Think about it. Resistance is the resistance to current flow. Less resistance means more current.

 

[dragnix 5,000+ posts]

but wouldn't it depends more on what is the purpose of the amplifier? Such as a 3000watts amp stable at 2ohm and 0.5ohms would theoretically pull the same amount of currents if they produce the same amount of power?

 

[bonesninja 5,000+ posts]

ohm's law says that 3000watts on a constant 14.4 volts=208.33333 amps period

 

[Earthman 10+ year member]

lower ohm loads=more current less voltage,higher ohm loads =more voltage less current

 

[bonesninja 5,000+ posts]

i feel squeak typing......

 

[profundus-sanus 10+ year member]

the increased current hurts subs thermal capacity significantly....

twice the current and half the voltage is required to run at .5 instead of 2.

extremely amp dependant....

 

[squeak9798 5,000+ posts]

Theoretically, 3000w @ half an ohm would draw less current because there is less resistance, therefore the amp would have to 'work' less in order to produce the power.

Not true.

Amplifiers will decrease in efficiency as the load decreases. More current + more stress on the components in the amplifier are going to lower efficiency. Here's a good example. PG Xenon makes roughly equal power into 4ohm, 2ohm and 1ohm....yet look what happens to the efficiency (towards the bottom of the page). Under your theory, efficiency should increase as load decreases;

http://carsound.com/articles/publish/article_413.shtml

As was mentioned....you would have to compare the specific amplifiers in question. But I would be genuinely surprised if the amplifier operating at .5ohm would be the more efficient amplifier.

 

[squeak9798 5,000+ posts]

i feel squeak typing......

Did you get a tingling sensation in "your special place" //content.invisioncic.com/y282845/emoticons/naughty.gif.94359f346c0f1259df8038d60b41863e.gif//content.invisioncic.com/y282845/emoticons/eek.gif.771b7a90cf45cabdc554ff1121c21c4a.gif//content.invisioncic.com/y282845/emoticons/wow.gif.23d729408e9177caa2a0ed6a2ba6588e.gif

 

[bonesninja 5,000+ posts]

Not true.
Amplifiers will decrease in efficiency as the load decreases. More current + more stress on the components in the amplifier are going to lower efficiency. Here's a good example. PG Xenon makes roughly equal power into 4ohm, 2ohm and 1ohm....yet look what happens to the efficiency (towards the bottom of the page). Under your theory, efficiency should increase as load decreases;

http://carsound.com/articles/publish/article_413.shtml

As was mentioned....you would have to compare the specific amplifiers in question. But I would be genuinely surprised if the amplifier operating at .5ohm would be the more efficient amplifier.

i knew it.....

 

[bonesninja 5,000+ posts]

Did you get a tingling sensation in "your special place" //content.invisioncic.com/y282845/emoticons/naughty.gif.94359f346c0f1259df8038d60b41863e.gif//content.invisioncic.com/y282845/emoticons/eek.gif.771b7a90cf45cabdc554ff1121c21c4a.gif//content.invisioncic.com/y282845/emoticons/wow.gif.23d729408e9177caa2a0ed6a2ba6588e.gif

HEYYYYY....mom said never discuss the "special" place with people outside the family

 

[audioarsonal 10+ year member]

so would i be better off at 2 ohms if my charging system isnt above 200 amps.i see everyone running at .5 and .7 daily but that has to kill batteries.reason im asking is the hk4000d runs at 2 ohms stable but i've seen modded to do .5. is this necessary or will 2 ohm work? im looking for spl not sq.if i need a mod anyone have any recommendations??

 

[22mountaineer 10+ year member]

so would i be better off at 2 ohms if my charging system isnt above 200 amps.i see everyone running at .5 and .7 daily but that has to kill batteries.reason im asking is the hk4000d runs at 2 ohms stable but i've seen modded to do .5. is this necessary or will 2 ohm work? im looking for spl not sq.if i need a mod anyone have any recommendations??

Can you run them on 1 ohm daily?