ZED says running @ 1 ohm is dumb

[SicAudio 5,000+ posts]

An 85dB sensitivity speaker will have power/dB ratios as follows:

Power SPL

1 watt 85 db

2 watts 88 db

4 watts 91 db

8 watts 94 db

16 watts 97 db

32 watts 100 db

64 watts 103 db

...

And so on. But power != volume, and perceived volume will double at a roughly 10dB increase, not 3 dB.

 

[zerosktr111 10+ year member]

i dont really care either way on the argument, tho i tend to agree with Penn solely based on the fact that Stephen Mantz has done more for car audio singlehanded than any 1 company has. I think I will trust a 40 year veteran over a post in a thread tyvm //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif
when any of you can even design an amp that is marketable to the masses lemme know and i might listen to you. until then it is just your opinion or interpretation of a written form of a law or theory. thats why HIL is a "theory" not a proven fact. look what happened with e=mc2 hmmm didnt it get disproved this last decade? oh yeah thats right it was a theory too, not a fact just and educated guess for now //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

Um when the **** was this proven wrong?

 

[SicAudio 5,000+ posts]

3db is barely perceptable to the human ear tho a meter is a dif story entirely.

 

[SicAudio 5,000+ posts]

His general relativity equations predicted a dynamic universe originally expanding & afterwards contracting (collapsing) due to gravity. In order to prevent that & describe the model of a stationary universe Einstein added the cosmological constant in his field equations. After Hubble proved through "redshift" that the distance between galaxies is proportional to the speed with which they are moving away from each other, the universe's expansion could not doubted, causing Einstein himself to refer to the cosmological constant as the biggest blunder of his career. Despite that, recent studies indicate that a cosmological constant taking certain values does not lead to a static but to a dynamic model of the universe, since the dark energy that the constant represents causes a negative pressure which does more than counterbalance gravity (as Einstein thought), but is responsible for the universe's accelerated expansion, which is already proven to happen (though until it was, many suggested a cosmological constant equal to zero that suggested a decelerated expansion). So in a way he was both right & wrong.

 

[SicAudio 5,000+ posts]

any theory is "considered" righ until it is proven otherwise.

 

[denim 5,000+ posts]

Zed also said that full range Class D sucked. Care to guess what topology his latest amplifiers are? Full range Class D.

Older designs have been and still are, the new ZED FR Class-D are some what different from what I have read.

 

[IamDeMan 5,000+ posts]

ghey, he is old and all old guys are into sq

That is because us old guys realize what really matters. SPL is for dick waving teenagers.

 

[Brian_smith06 10+ year member]

I run all my amps at 4 ohms //content.invisioncic.com/y282845/emoticons/hide.gif.2d479cfd917eedfe201353b91522ceab.gif

 

[SicAudio 5,000+ posts]

^^^^^^^^^^^^

x's 2 //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif i can get loud and sound good doing it but loud is a relative term, for me 140's is more than enough and 130's is even better.

 

[RJesus 10+ year member]

ok so,

pros vs cons of running @ 1 ohm vs 2 ohm vs 4 ohm ?

I would think that 2ohm is the best option, because its in the middle //content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif

 

[gunz4me2 10+ year member]

I do believe Zed mentioned somewhere on his site that he would build a high power, 1 ohm stable amplifier, if the demand was high enough. From that comment alone, I feel that Zed is all about the $$... Go figure.//content.invisioncic.com/y282845/emoticons/rolleyes.gif.c1fef805e9d1464d377451cd5bc18bfb.gif

This appears to be Zed's mind changing with the wind from Zed's perspective:

Five years ago - full range class D sucks, never mind the fact that it has been in use for pro audio for quite some time.

Three months ago - My full range class D amps are the shiznit because of advances in technology. You WILL not be able to tell them apart from their class ab counterparts. Turn on thump? Are you high? That is only an issue with those prima donnas listening for turn on thump with their ears next to the tweeters. If you clip this resistor on the circuit board, I guarantee that you will not hear said thump. Thank you for beta testing my first generation products by sending me your hard earned money. I am the Jesus Christ of amplifier technology, how dare you question me by saying my amps weren't ready for the mainstream! Blasphemer!

More recently - 1 ohm is totally unnecessary and impacts sound quality in a negative way. However, if there is enough demand, I will build a 1 ohm stable, SQ capable, monoblock and make some comment about technology advances allowing sound quality at 1 ohm. My followers will eat this up as if I am the messiah of amplifier technology and send me all their hard earned money. Besides, who are you to question an amplifier design God such as myself? If it weren't for me, NONE of you would have ANYTHING because I designed it ALL! You are lucky I allowed my designs to be copied without suing for patent infringement, otherwise you wouldn't have your cheap Korean and Chinese amplifiers of today!

Your amplifier God has spoken, now lap this up, send me your money, give me nuthuggeriffic reviews, and keep quiet about any problems you have! The Zed God has spoken, now let the Zed Stroke-a-thon begin!

 

[Ignatowski 5,000+ posts]

ZED is a smart fella,except when it came to hiring a web page designer

 

[audioholic 5,000+ posts]

Incorrect.

Originally Posted by audioholic And in fact, running at a lower impedance for increased output capability from the amplifier, and then adjusting your gains artificially low, is superior to running at a lower impedance and setting your gains at their 'proper' position. Why? 'Headroom' for dynamics.

the dampening factor at 1 ohm vs 4 ohm is dramatically reduced how is that better? if you have 1kw at 4 ohms or 1 kw at 1 ohm 4 ohms will always be superior. prove me wrong!

None of my comments touched on, or even implied anything to do with damping factor. Damping factor is an outside factor not being discussed in this thread. Zed's comments were based solely on power output in watts as related to impedance, and the corresponding db increase/decrease. Hence, my comments were based on the same factors. Look at my conclusions if you dont believe me, I clearly was talking about power output, and headroom to handle dynamic signal variation... nothing to do with damping factor in any way.
And, you can say 'dramatically reduced' by halving impedance, but so long as the damping factor remains within an acceptable level, as one would assume based on running an amp at an impedance it was designed to handle, your damping factor addition to the discussion really is just a hypothetical assuming the worst case scenario (that the amp will dip below an acceptable damping factor when driven to 2ohms or 1ohm versus 4ohms). If we are going to assume the amplifier will have poor damping at an impedance its rated to handle, why not carry your assumption further, and suggest the amp will display poor damping even at 4ohms? Should we start a thread stating that since going from 4ohms to 8 will double damping factor, that its stupid to run at 4ohms? There is nothing magical about 4ohms in terms of amplifier design. If a company designs an amp that is stable to .25ohms, for example, should we still assume anything below 4ohms will display poor damping abilities? No.

 

[audioholic 5,000+ posts]

if you read my posts you'd see I wasn't arguing at all until you felt the need to challenge everything I said. I just related my personal experience with the OP's pasted post by Zed. but since you're too lazy to look at my prior posts then you wouldn't know that.

And your real motive finally shines through... the fact you got butthurt because I pointed out you didnt understand why subs have become less efficient over the years based on your lack of knowledge of Hoffman's Iron Law. You didnt know, but now you do. Get over it.

 

[audioholic 5,000+ posts]

a law or theory. thats why HIL is a "theory" not a proven fact. look what happened with e=mc2 hmmm didnt it get disproved this last decade? oh yeah thats right it was a theory too, not a fact just and educated guess for now //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

No offense, but your denial of HIL, a law not a theory, a law that virtually every speaker manufacturer in the world refers to, tells me to not take your opinion too seriously. And your example of e=mc^2 only shows your fundamental lack of scientific knowledge, and history. But, you are entitled to your opinion that Zed is correct based on his reputation alone.
Cheers guys.