magicscreen
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- May 21, 2019
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Why are you using the Khadas Tone Board for the Atom (the transparent amplifier)?
Is the IMD hump not a big audible problem?
Is the IMD hump not a big audible problem?
Is the IMD hump not a big audible problem?
Why are you using the Khadas Tone Board for the Atom (the transparent amplifier)?
Is the IMD hump not a big audible problem?
Clean setup. I agree that the ESS hump is inaudible, or is at least to my ears. This setup is damn good for ~260 bucks and change (case and cables add an extra 60 bucks or so). What cables are those?
Clean setup. I agree that the ESS hump is inaudible, or is at least to my ears. This setup is damn good for ~260 bucks and change (case and cables add an extra 60 bucks or so). What cables are those?
Tube buffers just add a little bit ofdistortionharmonics
Funny part is that when there are no differences, say the unsuspecting listener is just told there are differences people can still here differences even when the measurements would show (because there were no real differences) the measurements did not change.
People are funny this way.
http://www.lavryengineering.com/wiki/index.php/Adapter_cableIf the sending end is the unbalanced two-conductor connector; both the shield and the “-” conductor of the pair are connected to the “shield” conductor of this connector. The “+” conductor of the pair is connected to the signal conductor of this connector. The shield is connected to nothing in the T.R.S. connector (receiving end) and the pair is connected to tip and ring similar to a balanced connection.
250mW @300 Ohms would be 8.66V RMS. given that Atom is unit-gain in low-gain, I would say that max. output level would be 2V RMS, so the desired 8.66V RMS to achieve 250mW @300Ohms would not be possible. But this is why Atom has the high-gain switch, right?
I'm using DT880 600Ohms with Objective2 on the 3.5X gain and it works fine with -1...0dB FS records, but with low-level recordings a powerful headamp might be needed. I would say that Atom will work perfect with your 250Ohms headphones.
I wonder why amplifier output cannot correlate with position of volume knob?
That's a detailed explanation, I get why we can't show power relative to knob position now. But can you tell me why can't we have a voltage output relative to volume knob position? Of course, it will be depended on input source/gain, but I think we should be able to give a spec in term of percentage instead (E.g: 70% of input source x gain @ 12 o'clock, etc).max. output power of an amp depends on max output voltage and current capabilities.
Max output voltage is determined by the internal voltage rails.
Max. output current could be limited by current limiting or other reasons.
The volpot position determines the output voltage.
The headphone impedance the output power at a certain output voltage.
At a certain volpot position a 600 Ohm headphone will have draw much much less power than when a 16 Ohm headphone is connected.
The volpot position to obtain a certain SPL thus depends on many factors:
1: gain of the amplifier
2: volpot taper (log, lin or other variant)
3: output voltage of the used source.
4: headphone efficiency (dB/V) not dB/mW and thus also headphone impedance.
That's just voltage gain. Getting high gain is easy just change one resistor value. You do not get more power out of it. It will just clip earlier or plainly not work depending on whether the gain is before the volume pot or after. Power is limited by the power supply voltage for voltage output and output device output current for current output.That's a detailed explanation, I get why we can't show power relative to knob position now. But can you tell me why can't we have a voltage output relative to volume knob position? Of course, it will be depended on input source/gain, but I think we should be able to give a spec in term of percentage instead (E.g: 70% of input source x gain @ 12 o'clock, etc).