- Thread Starter
- #121
Just AP. The amplifier test of course included the amp.What was load when 2R15W was measured?
Only AP input impedance?
Just AP. The amplifier test of course included the amp.What was load when 2R15W was measured?
Only AP input impedance?
Well, I also "hate" it when people don't do just a bit of homework before complaining. From company website which has a clear section for hifi: https://zerosurge.com/audio-visual-home-theater/Maybe. But I hate these "tests" that basically bash a product for something it does not claim, all the while not testing product for what it does claim. Basically, 40% have given this a rating of poor because that's that way the product was tested and the review written.
Then it is not normal working situation. If there is load what cause for example 10 A current, then also filtration curve will be different and probably some filtration can be measured.Just AP. The amplifier test of course included the amp.![]()
Who can define the impedance of a "normal working condition?" The load can be any and all things. Using this identical setup, I have measured filtering in other devices.Then it is not normal working situation. If there is load what cause for example 10 A current, then also filtration curve will be different and probably some filtration can be measured.
I am also not fan of power filters an not believe they give any benefit but measurements without load left open way to argue that measurement was not made in correct conditions.Who can define the impedance of a "normal working condition?" The load can be any and all things. Using this identical setup, I have measured filtering in other devices.
But sure, it could have load dependent filter response. The key is that the performance of the amplifier under test did not change.
I'm not an EE. ...
Is there a "normal operating load" specified? I would expect a transient surge suppressor to be a voltage device and not a current device. As long as the inductors' cores are not driven into saturation, there should be no change in filter characteristics.I am also not fan of power filters an not believe they give any benefit but measurements without load left open way to argue that measurement was not made in correct conditions.
Did you read the second and 3rd sentences in this paragraph as to why not to use "cheap" surge protectors?Expensive, I'm sure that there are less costly ways to get adequate surge protection. I just use power strips that have surge protection built into them, they're like only £15 or something!
Hmm, I doubt they pose a serious risk otherwise they wouldn't be able to be sold. I think that's over-egged. I think it's a bit absurd to intimate that they are dangerous, no way they could be sold in developed countries of the EU & USA if they were inherently dangerous whilst carrying out their bought primary task of protecting gear from surges caused by lightning strikes, etc.Did you read the second and 3rd sentences in this paragraph as to why not to use "cheap" surge protectors?
(Many a house has gone down in flames, taking the persons equipment [and sometimes family]) with it):
Traditional surge protectors rely on components that are in parallel with the line and sacrifice themselves (yep, the surge didn't get your equipment) should a sufficiently powerful surge arrives. Some can fail this way with (what kind of results?): catastrophic results (think smoke and fire). [that got your equipment and home instead of the surge] They are (what?): cheap and have the advantage of having no impact (if well designed) on power delivery of the unit.
And you have no recourse, as the surge protector DID protect your equipment from the surge (but it sacrificed itself and set your place on fire). Somehow that does not seem to me to be a financially or family safety sound solution. To each their own, however. By the way, I use a UPS (actually several, every room in my house has one) with built in parallel surge protection.
Their "filtering" does sound like a peak clipper.
The Dynamic part is that the the Peak limit is dynamically Adjusted to about 2V over the average peak.I think their Dynamic Filtering is in reality nothing of the kind. It's a simple peak clipper.
Fuse won't protect it directly. We had an incredible lightning surge when we lived in Florida and it completely destroyed my Carver stereo receiver. Sent it to the company and they repaired it together with a bag of parts they had to replace. There was a ton in there!A non ee question: What are the odds of a power surge harming one's audio equipment if the equipment has fuses? Other than a lightening strike, for which my house is grounded, how would such a surge occur?
Hi
I am at ease, thanks to ASR that these things do not improve the sound but their claim to fame is the "Surge Protector" part. This is a different area. We need to define a "surge", once it is defined then we will know how well the "Surge Protector" ..protects or not.
Most electronics equipment have some "surge protection", built-in. Electrical "Surges" vary in voltage, intensity, duration , even waveform. The amount of "Surge Protection" would need to be defined in the context of what can "ride" on an AC and, how well the Device Under Test , the DUT, protects said equipment. To make matter a more complex, electrical "surge" can be internal, coming from inside the house or external .. coming from the outside. Surge don't have to last a long time to destroy an equipment, a millisecond of a 10 KV surge is enough to destroy sensitive electronic components. Surges above 1000 Volts are common ... Thus the many questions: Would this "Surge Protector" protects from a 1 KV "surge" or a 3 KV, or ..X.. KV? W. I already know it will not improve the sound of my $16,000.oo Trinnov ( I don't own one, just dreaming) but I won't mind if a $1000.oo device protects my $20K investment? And , seriously , and more importantly HOW, do I protect my AV system?
The problem of electrical surges is real. Surge Protection is a specialized, even arcane area. We would like to understand a bit more about that and devise tests for these. I have no doubts this is a serious undertaking, outside , perhaps of the purview of ASR.. or is it? Mhhhh?@amirm . Even some basic test? I know from experience this cannot be easy , many such tests are of the destructive types, IOW, the DUT does not survive some tests...
Peace.
Local transformer blowing out, car hitting the transformer bank (usually with a very light weight fence around it, and numerous other ways. The 2 I mentioned, I have been on the receiving end of.A non ee question: What are the odds of a power surge harming one's audio equipment if the equipment has fuses? Other than a lightening strike, for which my house is grounded, how would such a surge occur?
What box did you see this? The product uses a "series mode filter" vs MOVs to protect against surges. It makes no claim to do otherwise from what I can tell.
Here is their explanation of how their technology suppresses surges
![]()
How Zero Surge's Technology Works - Zero Surge
Strong, fast surge current (1) comes from wall receptacle into Zero Surge unit. The inductor (2) inside our unit acts as a grid, slowing down and decreasing the surge current.zerosurge.com
It's tried and true and protects every NFL stadium and major venue in the country.
"As recommended by IEEE (Emerald Book 2005), SPDs should be coordinated in a staged or cascaded approach. The starting point is at the service entrance. (Service entrance protection is also required by NFPA 780.) The first surge diversion occurs at the service entrance, then any residual voltage can be dealt with by a second SPD at the power panel of the computer room, or other critical load (see Figure 15). This two-stage approach will reduce 20,000 V induced lightning surges well under 330 V peak as recommended by IEEE and CBEMA."
You might want to check with your local fire department on that. My fire fighting friends have had a few things to say about it.Hmm, I doubt they pose a serious risk otherwise they wouldn't be able to be sold. I think that's over-egged. I think it's a bit absurd to intimate that they are dangerous, no way they could be sold in developed countries of the EU & USA if they were inherently dangerous whilst carrying out their bought primary task of protecting gear from surges caused by lightning strikes, etc.
He is saying that these devices filter SURGES. Good enough? Did Amir measure what happens if you send a surge of power through it? NO. He doesn't have capability.Uhm....I hope you're trolling.