- Aug 29, 2019
I don't own an APx555, as you know.
The thing technically has an unbalanced output. I would make sure the measurement setup is 100% devoid of ground loops before making any such assumptions.I think my APU +34dB LNA is broken, by the way.
Should be, indeed.0.3 µV(A) is "only" -128.2 dBu(A), which I imagine should be well within reach of at least some of the mic preamps you've got floating around.
Good idea. I'll give it a try.Even more so if you treat the stereo output as a balanced one with 3 dB higher noise and run that directly into the pre with a TRS --> XLR cable.
That's the idea of using a preamp. But the preamp itself has to be good enough.You are basically looking at the noise with a magnifying glass. Your measurement system does not need to have as much dynamic range as the output at all for this.
2V in, mid gain (low gain isn't any better), volume lowered to 50mV. So noise may be from the generator.Are you specifically going for a gain setting / volume combo on the L30 that gives 50 mV out with 2 V in, or just testing with volume turned down and an open (/shorted) input?
I'll have a look, thanksIf you need to do the math manually, here's a quick reminder that my RMS summing/unsumming calculator exists...
That's indeed part of the issue.The thing technically has an unbalanced output. I would make sure the measurement setup is 100% devoid of ground loops before making any such assumptions.
Of course. But it's so much above the others that I wanted to try and reproduce it. Also to assess how far I can measure.Either way, even -96 dB ref. 50 mV or ~0.8 µV would still be as good as you'll ever need. That's something like -122 dBV, so should be <+20 dB SPL with any IEM in existence. Anything even better is really just showing off.
Exactly.But it should be reproducible if claimed, of course.
Xduoo MT-602 is a hybrid tube amp, not a true tube amp. L30 will be better in the aspects of distortion and SINAD compared to a tube amp, but it depends on your taste.Hi, can someone tell me if this is a better buy price to peformance-wise than the almost triple price of the xDuoo TA-26?
The headphone i will be using is the 600ohm DT880.
I've also heard that tube amps are better for this headphone?
Are the cheaper xDuoo MT-602 better?
Ther'es also the A30Pros, im confused.
And lastly, how much "mW" power does the L30ii provide at 600ohms?
It should work. In most cases though, you're better off buying a simple, clean DAC and using software EQ to change bass and treble.the reason im asking is because it has a bass and treble knob, will it work?
Seemed that the whole pot was crooked, knob would rub on the bottom almost the whole time. I already returned it for another unit, one of the things Amazon does well when you order with Prime shipping.QC issues can and do happen with inexpensive mass-market gear. Does the rub spot move with rotation (which would indicate that the knob itself is warped) or does it stay in the same place (which would indicate that the pot is soldered in crooked)?
As a first order of business I would give the knob a bit of a tug to get it out a millimeter or so. If that doesn't look wonky or anything, the knob may just have been pushed on with a bit too much gusto at the factory. I think my Atom Amp+ had the same issue when I got it.
According to Amir's measurements, the L30II can drive the HE6se V1 to 113dB SPL Peak, which is very loud.Can this drive He6se V2 well enough or should I not bother with that headphone?