FredA
Headphoneus Supremus
- Joined
- Dec 15, 2013
- Posts
- 5,535
- Likes
- 6,881
I performed two sets of tests: most of the tests were with the unbalanced RCA output out the back of the unit, not headphone output. In addition to those "DAC tests," I also tested the headphone out with respect to power output and impedance. Now that you know this, please explain again what is incompetent about the data.
Once again, most of the tests are with the DAC portion alone. There, the comparison is the same as the unbalanced RCA outputs are used. Here is an example output from RCA outs, NOT headphones:
I replicated that very test to the bit and got completely (worse) results than they show on their spec page. See: https://www.audiosciencereview.com/...-dac-and-headphone-amplifier.2486/#post-71124
And my reporting/measurements show that degradation clearly. Their own specs are not at all compliant with the performance I see and paint a picture of an amplifier stage that is using feedback. That is not correct.
Please. I have been an audiophile for nearly 50 years. I am a trained listener professionally and can pass double blind tests of tiny differences that scare most people from just running the tests. Yes, my hearing is not as good as younger folks but in this case, what I hear correlates with the measurements.
Please forgive me for being blunt but being an EE is insufficient for you to know psychoacoustics. Much of the distortion we measure is masked by the music itself. I am pretty sure the differences I noted would be inaudible to many others. Please read my tutorial on audio measurements to understand what these measurements, and how audible they can be.
But you can ignore all of my listening tests and just go by the measurements. On that front, the company is well aware of my work and they have NOT produced any measurements of their own to counter them. I am happy to be corrected but not by wrong assumptions of what is measured and not having your own data to counter mine.
The manufacturers should be producing the measurements I am producing. Since almost none do, I am performing that task with no compensation whatsoever. It is just a service to the community. As such, it seems odd that you would spit on my work while defending the company. Whose side are we on anyway?
Has the unit been properly burned? What load do you put on the rca out? Not 30 ohms I hope.
This test does not correspond to any of my listening experience with audio-gd. And I trust Kingwa's measurements. The fact that you use Topping as a benchmark is not good for your credibitlity. The fact that your listening experience does not match your measurements does not help you case either. The level of distorsion you measure is a clear indication that you made a mistake. This level of distorsion would make any gear sound like garbage.
It's either trusting a complete outsider like you ou Kingwa and my own ears. So, that's a simple choice really. Measure the r2r 11 for fun i.e. arguably the best-sounding combo under 1K and show us the graphs so we can have a good laugh.
What you are doing, be it an honest mistake or not, is diffamation, plain and simple.