GR Research B24 AC Cord Review

[BDWoody]

You and your nerdly friends go ahead on, do some audibility testing for fun.

Not sure why so much attitude, but you can dial that back.

 

[Spkrdctr]

This is what @SIY asked you to begin with. Is it a or b or something else. The objective determines the test design. And @amirm and the discussion clearly was about A).

So if everyone else posting is asking question A why do you keep answering in reference to question B?

 

[HarmonicTHD]

So if everyone else posting is asking question A why do you keep answering in reference to question B?

I did not, at least I am not aware of it then and it certainly is not my intention. DualTriode thinks one has to use “large populations” and one can not do a controlled test with 1 person at home. Do you have me confused?

 

[Spkrdctr]

I did not, at least I am not aware of it then and it certainly is not my intention. DualTriode thinks one has to use “large populations” and one can not do a controlled test with 1 person at home. Do you have me confused?

Yup, that was intended for Dual Triode. Sorry!

 

[DonH56]

There's no need for a large sample population when the goal is for one person to see if they can tell a difference. The sample population can be one since only the one cares about the result. What does matter, IME/IMO, is doing enough test runs over enough time to determine (or convince myself) that there is, or is not, a difference that can be heard. How well a test is controlled is not determined by how many try the test, though the outcome might be. In the case of a guy (gal, whatever) sitting at home trying to decide if DAC A or DAC B sounds better, all it takes is careful matching of level and a different hand on the switch (could be a computer-controlled switch, natch). You could listen in mono with one DAC (or whatever) on the left and one on the right channel, just toggling between left and right, for example. I used to have a simple relay for switching power amp outputs (actually a pair of DPDT relays with a load resistor on each so the amp was not driving into an open) controlled by a simple logic circuit that randomly selected the output and kept track in the box with LEDs. These days I'd use a Raspberry Pi or something and a program to keep track for me (I had to manually open the box and record the LED settings back then , several decades ago).

Since this thread is about power cords, I think they are hard to test. Not because just measuring a power cord is hard, that's easy, but because of all the "what if" conditions people will ask for and claim make a difference. Current draw, amplitude and frequency of direct (from the wall socket) and impinging noise, interaction with the wall source and component (impedance, etc.), etc. So many ways for people to say "well, you did not test my system, so it doesn't apply, and I know what I heard". That is where a single-person test comes in handy.

 

[droid2000]

I haven't read this whole thread on a simple power cable, 37 pages so far lol, but I can unequivocally say $350 for a power cable is completely ridiculous. I'll sell you one for only $300.

 

[DualTriode]

I have never grabbed your wife.

And you have no idea whatsoever what you're talking about. I don't say that for your sake (the Dunning Kruger is far too strong) but for the sake of anyone else who might take any of that nonsense seriously.

I recall your post about some red light project where you told of including your wife in A X B testing

 

[SIY]

I recall your post about some red light project where you told of including your wife in A X B testing

Uh huh.