New from SMSL: SU-9 Ultra MQA High-Performance DAC

The Future Has Arrived, and It's Affordable

Welcome to the launch of the SMSL SU-9 Ultra MQA High-Performance DAC—a state-of-the-art digital-to-analog converter that promises an unparalleled audio experience. Priced at $499.99, this DAC is equipped with groundbreaking features that audiophiles will love—ultra-low THD+N, next-generation AKM D/A chips, proprietary jitter processing circuitry, and a plethora of input options, to name just a few.

Silencing the Noise—Understanding THD+N

What's the big deal with low Total Harmonic Distortion Plus Noise (THD+N) numbers? When it comes to audio equipment, lower is better. The SMSL SU-9 Ultra boasts a staggering THD+N value of 0.00006% or -124dB. To put it simply, this ensures that the music you listen to is as pure and unaltered as possible. There's no noise, no distortion—just the sound as it was meant to be heard.

Unpacking the Specs: AK4191 + AK4499EX Chips

The SMSL SU-9 Ultra comes with an advanced chipset—a unique blend of AK4191 and AK4499EX D/A chips from Asahi Kasei Microdevices Corporation (AKM). The AK4191 chip offers new "asynchronous operation mode," enabling a low-jitter clock. This chip combo can handle ultra-high-resolution sound sources, providing you with impeccable audio quality.

Minimized Noise, Maximized Clarity

Another feature that sets the SU-9 Ultra apart is AKM's "Data Weighted Averaging (DWA) Routing Technology." This isn't just technical jargon—it's a breakthrough in noise suppression that enhances the signal-to-noise ratio. The outcome is music that sounds cleaner and more lifelike than ever before.

Versatile Connectivity Options

Whether your music source is a vintage CD player or a state-of-the-art computer, the SU-9 Ultra has got you covered with its versatile input options. USB, Optical, Coaxial—you name it, this DAC supports it.

Product Highlights

  • Ultra-low THD+N of 0.00006% (-124dB)
  • Proprietary CK-03 jitter processing circuit
  • Multiple input options: USB, Optical, Coaxial
  • Built-in shielding and low-noise power processing
  • High-end gold-plated input/output interfaces
  • Fully fitted, high-transmittance display

Head on over to the SMSL SU-9 Ultra product page for more details, and if you need more information please contact our dedicated Support Team via live chat online or email us at

As with all purchases, when you buy from us you get the Apos Promise for Free Priority Shipping, an Extended 1-Year Transferrable Warranty, a 45-Day Return Policy, and our 30-Day Lowest Price Match.