Here are some results of my online blind tests. Note that anyone can take it and compare.
Online Blind Testing a 0.5 dB Level Difference using Samsung Note 9 with low cost headphone.
Result – Pass
Test Link: https://www.audiocheck.net/blindtests_level.php?lvl=0.5
Result screenshot:
Online Blind Testing a 0.2 dB Level Difference using Samsung Note 9 with low cost headphone.
Result – could not sense up
Result screenshot:
Blind testing a 5 Pitch Difference using Samsung Note 9 with low cost headphone.
Result – Pass
Test Link: https://www.audiocheck.net/blindtests_pitch.php?cent=5Result screenshot:
Online Blind Testing a 0.5 dB Level Difference using laptop, Topping e30 DAC, Parasound A21 amp, and Paradigm Persona B speakers.
Result – Pass
Test Link: https://www.audiocheck.net/blindtests_level.php?lvl=0.5
Result screenshot:
Blind testing Timing Difference (2-way)
Results: Using multiple different chain, can go all the way to 1ms
Test link: https://www.audiocheck.net/blindtests_timing_2w.php?time=100 to start.
Results table 1: Showing which chain can pass which test using certain clue. Not matching voltage as the aim was to pass tests.
Result table 2: Both chains matched voltages
A youtube video showing how easy to pass when using Topping chain due to special second click clue:
Klippel distortion tests (two-tone 70hz 800hz tests) using Topping E30, L30, AKG 371.
Result: On second try, got -60.
Test link: https://www.klippel.de/listeningtest/
Result screenshot:
Klippel distortion tests, full range speaker with stimulus “Music T. Chapman” using Samsung Note 9 headphones out to Taotronics headphones.
Result: Got -54, the lowest possible
Test link: https://www.klippel.de/listeningtest/
Result screenshot:
Klippel distortion tests, full range speaker with stimulus “Music T. Chapman” using speakers setup in living room. This is not as easy. After second tries, only got -27db.
Chain is laptop->Gustard X16->Parasound A21->Paradigm Persona B
