[KaiSc]

Well, it's been a long time since I had to do logarithms, etc, but 10^x indicates that you multiply 10 by itself x times. Right? 10² = 10x10, 10³ = 10x10x10, etc.
And (T-S)/10 indicates that you want to find how many times 10dB is added between sensitivity and target loudness. So, 10x power every +10dB (e.g., 10db = 10mW, 20dB =100mW, 30dB = 1,000mW), unless I'm really misunderstanding something.
It's the same basic math as what I showed above, but with 10 and 10 instead of 2 and 3.

Correct:
+10dB is 10-fold if you calculate with Power, because Power is a squared measure: P=U²/R
+20dB is 10-fold if you calculate with Voltage, because Voltage U is a linear measure, a basic physical quantity.

That's how dB (dezi-Bell) is defined.

This way you get the same dB value if you turn a volume dial, no matter if you calculate with Power or Voltage.

 

[megabigeye]

Neo, some people prefer the blue pill, others the red one...

I should be embarrassed to admit that it took me 5+ hours to understand this reference. I was doing something else and all of a sudden, oh, *that's* what he meant...

EDIT: ...Or maybe I don't... Your post no longer quotes my post...

 

[courierdriver]

I should be embarrassed to admit that it took me 5+ hours to understand this reference. I was doing something else and all of a sudden, oh, *that's* what he meant...

Lmao! Better late than never.

 

[slex]

New Firmware is out.

 

[lgcubana]

Now the 20 custom EQs can be renamed

 

[jsmiller58]

Now the 20 custom EQs can be renamed

Now we’re talkin’!

 

[jasonb]

So is there a firmware update or just an update for the app?

 

[slex]

So is there a firmware update or just an update for the app?

 

[jasonb]

Ok, so both firmware and app updates.

 

[edoin]

oh wow, haven't bothered to update fw for a while and now they have ambient sound mode? nice!

 

[IEMusic]

Now the 20 custom EQs can be renamed

So simple, yet such a HUGE deal.

 

[TK33]

So simple, yet such a HUGE deal.

And the custom EQ presets are now on top (can be switched back too it seems). Much more user friendly.

 

[Mouseman]

Renaming the presets is a wonderful change. Thank you quidelex for continuing to improve the app. Makes you wish other companies would do the same.

Does anyone see a toggle in the app for ambient? I see where you can assign the button press, but that was it.

 

[wasihrwollt]

Recabled beyerdynamic dt250 balanced for qudelix. Early reaction: love everything about it. Nice straight industrial design. Buttons work really nice. Solid bluetooth connection. Sound=perfect. Everything better than shanling up2. Pic for how i wear it around the neck

 

[KaiSc]

Hello fellow Qudelix peeps. Currently loving my 5k with iems but I have a couple questions.

I plan on expanding my hifi game by grabbing a couple over ear cans.. but I want to be price conscious about it. Probably end up grabbing hd6xx and hifiman 400i. I believe the hd 6xx needs more amps to drive since it's higher impedence? Wondering if anyone knows if the Qudelix 5k should be able to drive both of these cans or should I go with something like jds labs amp? Would I be able to use the 5k as a standalone dac and hook it up to an external amp if I needed more power for like a hd800s?

Also does anyone know a good online source to understand all the variables that needs to be known to calculate sufficient power for future use?

TIA

Here you find what you are looking for, a very comprehensive table of headphones and their power requirements and capabilities:

https://diyaudioheaven.files.wordpress.com/2013/03/headphone-power-table-2.pdf