1 ohm = 'dirty signal'?

[avs20 10+ year member]

So I was talking to a company today, and they do NOT recommend 1 ohm from any amp for their speakers because the signal is 'dirty'. They recommend ONLY 2 ohm and 4 ohm from an amp because they are 'cleaner' signals.

I have run many systems, all at a little over, at, or below 1 ohm and have never had a problem with this so called 'sub destroyer' problem they are talking of. The only thing I can think of is setting the gains wrong when running 1 ohm since output is obviously greater at 1 ohm than 2 or 4.

What do you guys think?

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[jmanpc 5,000+ posts]

whoever you talked to is wrong.

 

[bdawson72 5,000+ posts]

Meh

 

[Platestacker45 10+ year member]

Yup, had some guy at the local audio shop tell me the same thing. He also said most amps more power a 4ohms then they do at 1ohm and it is very rare to find a amp that produces power the other way around... //content.invisioncic.com/y282845/emoticons/eyebrow.gif.fe2c18d8720fe8c7eaed347b21ea05a5.gif

 

[grassroots 10+ year member]

the THD does increase the lower the ohm...

 

[avs20 10+ year member]

Yes, thd DOES increase lower the impedance, but with properly set gains...this shouldnt be a problem.

 

[bdawson72 5,000+ posts]

Yes, thd DOES increase lower the impedance, but with properly set gains...this shouldnt be a problem.

Do you really know what you are talking about?

Duh 1 ohm is a lower impedance than 4.

That wasn't the question though.

 

[~Magick_Man~ 10+ year member]

so who told you this?

~Magick_Man~

 

[avs20 10+ year member]

Do you really know what you are talking about?

Duh 1 ohm is a lower impedance than 4.

That wasn't the question though.

uh..what? Who said 1 ohm isnt lower than 4?

 

[Beat_Dominator 5,000+ posts]

15% THD at 1ohm FTL.

 

[bdawson72 5,000+ posts]

uh..what? Who said 1 ohm isnt lower than 4?

Eh, i misread ur post.............Continue sir

 

[avs20 10+ year member]

bdawson..yah, Platestackers reply confused me at first too with the way it's worded.

 

[avs20 10+ year member]

15% THD at 1ohm FTL.

15%? good god.

 

[RydHy3845 10+ year member]

lower ohm load=higher distortion,though I doubt you will here it.

 

[sundownz Pro Seller]

Technically it is true to a point... any given amp, even one sable at a 1 ohm will produce a lower THD at 4 ohms. Modern subwoofers amps produce such a low THD within reasonable limits at 1 ohm that this is a total non-issue, though.