I know, I know. I recently did an experiment on Audiogon forums engaging similar kinds of woo-woo. I‘m still not sure if there are any positive take-aways other than “wow, did I just waste hours of my time?”
-
WANTED: Happy members who like to discuss audio and other topics related to our interest. Desire to learn and share knowledge of science required. There are many reviews of audio hardware and expert members to help answer your questions. Click here to have your audio equipment measured for free!
GR Research B24 AC Cable Review: Does it Make an Audible Difference?
- Thread starter amirm
- Start date
sweetsounds
Active Member
- Joined
- Apr 24, 2019
- Messages
- 141
- Likes
- 283
There is an A:B comparison on Jay's Audio Lab Youtube between power cables. People report to hear a difference. And indeed there is: if you take a look at the preamp display, the volume changed between presentations when "nothing changed but the cable" 
Anyone ever did a real blind AB comparison, which yielded differences? My mid-fi cables look pretty, but sound same to me.
Anyone ever did a real blind AB comparison, which yielded differences? My mid-fi cables look pretty, but sound same to me.
DanielT
Major Contributor
....because you can't hear a difference, it's...There is an A:B comparison on Jay's Audio Lab Youtube between power cables. People report to hear a difference. And indeed there is: if you take a look at the preamp display, the volume changed between presentations when "nothing changed but the cable"
Anyone ever did a real blind AB comparison, which yielded differences? My mid-fi cables look pretty, but sound same to me.
What the hell is this thread? Barstool science and philosophy by audio amateurs? Science is experiments… theory of knowing is epistemology…. Keep your sandboxes separated
This site concerns engineering and technologies in regards to sound , acoustics and devices that deliver these attributes.
Moderators do your job
This site concerns engineering and technologies in regards to sound , acoustics and devices that deliver these attributes.
Moderators do your job
Midnight Audiophile
Active Member
- Joined
- Jun 30, 2022
- Messages
- 143
- Likes
- 226
It would be nice to have a concise "Skeptics Guide to the Hi-Fi Universe." Cover each component with scientific evidence and references.
linesplice
Member
- Joined
- Nov 2, 2018
- Messages
- 13
- Likes
- 6
I've always thought that AC conditioners / regenerators have always had more opportunity to be "legitimate" sound "enhancers" but 3-foot long cables only have the ability to change capacitance and yes, therefore sound. As many others have said, 30' of code-standard Romex or a breaker in a panel are going to change the threshold for energy more than the last couple feet. Such snake oil. Wish you had measured an equivalent length of Romex or house wire as a baseline.
Last edited:
How can they sell power cables that arnt safety approved? In Canada:
"21 (1)Subject to subsections (3) and (4), a person must not use electrical equipment in British Columbia, or offer for sale, sell, display or otherwise dispose of electrical equipment for use in British Columbia, unless the electrical equipment displays a label or mark as follows:
(a)a certification mark;
(b)a label or mark of a certification agency that is acceptable to the appropriate provincial safety manager to certify electrical equipment for a specific installation;
(c)an approval mark issued under section 10 of the Act;
(d)in the case of used manufactured homes, used factory-built structures and used recreational vehicles, a label supplied by the appropriate provincial safety manager.
"21 (1)Subject to subsections (3) and (4), a person must not use electrical equipment in British Columbia, or offer for sale, sell, display or otherwise dispose of electrical equipment for use in British Columbia, unless the electrical equipment displays a label or mark as follows:
(a)a certification mark;
(b)a label or mark of a certification agency that is acceptable to the appropriate provincial safety manager to certify electrical equipment for a specific installation;
(c)an approval mark issued under section 10 of the Act;
(d)in the case of used manufactured homes, used factory-built structures and used recreational vehicles, a label supplied by the appropriate provincial safety manager.
Cheap extension cords make great speaker wire, too. Is there anything they can't do?
Huh, no resistance measurements?
Sure, you can measure the resistance. But if a cord is rated say, 10AWG for long 15A runs, chances are it's not bad. The end connectors you put on it may have more resistance.
How can a conditioner or regenerator enhance sound?
There are a lot of things you could question in that post.
DHT 845
Addicted to Fun and Learning
- Joined
- Feb 28, 2021
- Messages
- 509
- Likes
- 442
AmirmAmazon prints them on demand. Amazing that from order until delivery took a bit more than 24 hours! Figured it was worth the wait given the circumstances.
Did you really tried to hear the difference on Topping A90 discrete?
Oh man! This device has SMPS, there is no way to hear the difference on a device with SMPS. I hear zero difference on power cords with topping Pre90 for ex. ZERO.
But with topping d70s and my other DACs with traditional PS, there are clear differences with power cords even though D70s has great filtering and measures perfect.
And one more remark on your test. You measured resistance of the cables, for what? I think power cables make the most difference more because of their capacitance.
If you add for ex. 10pF capacitor (let say mica cap) to the power supply main filter caps it does make a difference. That 10pF with it's extremely fast discharge capability would be the "reservoir" for some sections of the device and that is heard in detail, focus, depth etc. But I am not surpriced you heard and measured zero difference with A90d that has switch mode power supply especially very modern and low noise SMPS...
Comedy gold. Thanks. :O) I presume you're joking.Amirm
Did you really tried to hear the difference on Topping A90 discrete?
Oh man! This device has SMPS, there is no way to hear the difference on a device with SMPS. I hear zero difference on power cords with topping Pre90 for ex. ZERO.
But with topping d70s and my other DACs with traditional PS, there are clear differences with power cords even though D70s has great filtering and measures perfect.
And one more remark on your test. You measured resistance of the cables, for what? I think power cables make the most difference more because of their capacitance.
If you add for ex. 10pF capacitor (let say mica cap) to the power supply main filter caps it does make a difference. That 10pF with it's extremely fast discharge capability would be the "reservoir" for some sections of the device and that is heard in detail, focus, depth etc. But I am not surpriced you heard and measured zero difference with A90d that has switch mode power supply especially very modern and low noise SMPS...
It reads a bit serious in places. Perhaps you could make it clearer that you don't mean that nonsense.I suppose you do
If anybody working for me had ever designed something mains powered that needed a different mains cable to work properly I would know he/she was an incompetent fool and they would be looking for a new job.Amirm
Did you really tried to hear the difference on Topping A90 discrete?
Oh man! This device has SMPS, there is no way to hear the difference on a device with SMPS. I hear zero difference on power cords with topping Pre90 for ex. ZERO.
But with topping d70s and my other DACs with traditional PS, there are clear differences with power cords even though D70s has great filtering and measures perfect.
And one more remark on your test. You measured resistance of the cables, for what? I think power cables make the most difference more because of their capacitance.
If you add for ex. 10pF capacitor (let say mica cap) to the power supply main filter caps it does make a difference. That 10pF with it's extremely fast discharge capability would be the "reservoir" for some sections of the device and that is heard in detail, focus, depth etc. But I am not surpriced you heard and measured zero difference with A90d that has switch mode power supply especially very modern and low noise SMPS...
Any mains device which actually needed a different mains lead to work properly is a load of old rubbish and should be recycled.
DHT 845
Addicted to Fun and Learning
- Joined
- Feb 28, 2021
- Messages
- 509
- Likes
- 442
Guys,
1) I did not linked Danny's reply to ASR test of his cord because I agree with his arguments. I did it bacause nobody else did it here and he has the right to defend himself.
2) I am not going to defend power cords manufacturers and the "stories" they make to sell them, in fact I don't believe in their theories and explanations.
3) I hear the difference with many devices with traditional PS, so what? Nothing, exept that many on ASR will think that I am an idiot. Who cares?
1) I did not linked Danny's reply to ASR test of his cord because I agree with his arguments. I did it bacause nobody else did it here and he has the right to defend himself.
2) I am not going to defend power cords manufacturers and the "stories" they make to sell them, in fact I don't believe in their theories and explanations.
3) I hear the difference with many devices with traditional PS, so what? Nothing, exept that many on ASR will think that I am an idiot. Who cares?
