Recent comments in /f/headphones

thatcarolguy t1_jeah5s2 wrote

Your body burns fat and muscle whenever you are in a caloric deficit of any type. The benefit of a fast for quick fat loss is that it is the fastest (outside of extreme endurance exercise) way to burn fat. If you could burn 3500 calories per day (which is probably a bit more than you really do but a nice number because....) it would mean that you burn the equivalent of 1 pound of fat per day (though some of it will be muscle). There is nothing magical about ketosis that can make you burn more fat than the amount of energy you expend in a day.

If humans (who are not suffering from extreme morbid obesity) could lose 10 lbs of fat from fasting for 2 days then our species would have gone extinct long ago.

Also, you don't lose fat cells, you just reduce the amount of fat stored inside of them.

Do you reject the idea that you are also shedding large quantities of water due to glycogen reserves being depleted?

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blorg t1_jeag0v3 wrote

The current does change though, current is proportional to voltage (Ohms law).

Double the voltage, double the current.

Power is the product of the voltage and current (Watt's law).

But you double one, you double the other. So double the voltage = double the current and as both are doubled, the power increases by the square of the voltage.

  • 2V @ 300Ω = 13.3 mW
  • 4V @ 300Ω = 53.3 mW

And this is actually the typical power you get out of 2V single ended / 4V balanced stuff.

Look for example here at actual measurements of the Moondrop MoonRiver 2 which does max 2V SE, 4V balanced.

At 300Ω, it is able to reach the full 2/4V without clipping and does ~13mW single ended, ~53mW balanced. At 68Ω, it's still hitting the full 2/4V and the power is ~59/235mW. The balanced power in both these cases is 4x exactly. So any headphone over 68Ω, you will get 4x the power on the balanced.

At low impedances, there can be a limit to current, so the amplifier will clip and you won't get 4x. You can see this here with 32Ω, where it gets 125mW single ended but only ~250mW balanced- and it then clips and distorts, rather than running out of voltage as in the other cases.

But you typically will get the full 4x at double voltage, into higher impedances.

Exactly how much at a given impedance depends on the design of the amp. But 4x is the theoretical increase in power, if current is not a limiting factor. And it typically won't be, into higher impedances. Check the spec sheets for some other amps with both, like the Topping A90D, you can see that 250mW SE but 1,000mW balanced into 300Ω. If you go all the way down to 16Ω, it's less, it's 3,300mW vs 9,800mW, i.e. 3x. Because there's a current limit. It's still over 2x though even at 16Ω.

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IfTheGloveFits t1_jeae1vg wrote

>Ya'll are in an abusive relationship with audio gear. You keep buying and buying and buying, even if it fails. Then, you just post a pic of it.

Speak for yourself pal. I'm not the one who blind bought 3 of the same item. And as /u/MachineTeaching mentioned, have you tried to get those fixed? Must be under the warranty period at least. I understand wanting to vent but why not try to get it repaired/replaced/refunded.

>That is it. Just wanted to shout into the void and probably get attacked by some angry kids that cannot handle the truth of their favourite brand being shit or whatever.

Maybe divert some of this anger toward the manufacturer/reseller and try to get them to fix your broken shit? Just food for thought.

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dioverme OP t1_jeadu2v wrote

Just add a look and the mini TRS in the front of the Node is an input. Can see it by the fact it has any kind of level control. My biggest doubt on the R7 would be how the HP amp stands against K7. The price gap is circa 500€, which is kinda crazy. At that point I could just power UP the computer and using foobar+K7 as usb dac/hp amp combo

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RayceManyon OP t1_jeaddxq wrote

I was bitchin' about this to my buddy, and he simply put it... "Everyone in that warehouse is stealing. Everyone." After looking at all the people saying they got their order dropped, and how wrong their inventory count was, I tend to agree.

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