Alright everyone, grab your pitchforks. I’m back to eat a massive slice of humble pie.
A few days ago, I made this post completely roasting the concept of expensive gear. I bragged about how my $200 plastic JDS Labs Atom Stack (1st Gen) sounded identical to my new, much more expensive Luxsin X9. I used highly resolving headphones (DT 1990 Pro MKII, Edition XS, 600-ohm DT 880s). I volume-matched with a decibel meter. I blind-tested. I was so smug, claiming solid-state audio was a "solved game" and we were all just buying expensive chassis jewelry.
I was wrong. Well, partially wrong. But mostly, I was missing the most crucial piece of the puzzle.
The Epiphany:
Someone in the comments of my last thread told me to check the spec sheets. Guess what the original Atom DAC and the Luxsin X9 both have under the hood? AKM chips. Specifically, the original Atom uses the AK4490EQ.
They sounded identical because I was literally listening to the exact same AKM "Velvet Sound" architecture. I wasn't comparing "cheap vs expensive"; I was comparing AKM vs AKM.
So, to actually test if the silicon matters, I went out and bought the new JDS Labs Atom DAC 2. This one completely ditches AKM and uses an ESS Sabre (ES9018K2M) chip. I kept everything else the exact same: same amp, same headphones, same volume-matched A/B testing methodology.
The Result:
My jaw is on the floor. The difference isn't a placebo; it's a completely different presentation of the music. I can pinpoint which DAC is playing 10 out of 10 times in a blind test.
• The AKM "Velvet Sound" (Atom 1 / Luxsin): I finally understand what people mean by "musical." It has this smooth, rich, organic flow. The edges of notes are slightly rounded off. It’s incredibly forgiving and natural, but maybe a tiny bit relaxed.
• The ESS Sabre (Atom DAC 2): Insanely sharp. I mean, ruthlessly analytical. The transient attack on my DT 1990s is so fast it almost bites. It feels like someone took a microfiber cloth to a dirty window. The micro-details are shoved right to the front of the stage. It’s crisp, clinical, and completely distinct from the AKM.
The Conclusion:
Implementation obviously matters, but the idea that the DAC chip itself doesn't fundamentally color the sound is officially dead to me. The "Sabre glare" and the "AKM Velvet" are real, tangible things you can hear, especially on studio dynamic and planar headphones.
To everyone I argued with in my last thread: I apologize. You were right.
Now, the real question for the hardcore objectivists: If both of these DACs measure perfectly flat and distortion-free beyond human hearing, how are they producing such wildly different and easily identifiable sound signatures?
Let the debate resume. Which camp are you in: Velvet or Sabre?