Essence HDACC II-4K

Rated 5.00 out of 5 based on 7 customer ratings
(7 customer reviews)

$ 699.00 $ 599.00

New Hi Res Digital Audio Controller for 4K Sources!  HDACC II-4K USB DAC featuring 4 x 1 HDMI v2.0a Inputs and Switching for 4K Sources

  • 4 HDMI v2.0a Inputs x 1 HDMI v2.0a Output
  • 32 Bit / 384K Sample Rate Audio Upsampling
  • Supports HDR10 and Dolby Vision
  • USB 2.0 Input, Optical+Coaxial Inputs / Outputs
  • Analog Input with A to D Conversion
  • Remote Control
  • DSD 2.8K and 5.6K (DoP) Playback 
  • Native LPCM 24/192K playback
  • OLED Display of Native Sample Rate Inputs / Selected Output
  • Headphone Amp with user selectable impedance
  • THD + N = 0.00001% at -141 dB S/N Ratio                                                                                                                 

Note: Free shipping in the USA; orders outside the USA will be shipped via US Postal Service Priority International and must be placed on this online orderform

                                                                                                                                      Upgrade to HDMI v2.0 Fiber Optic Cables for the best 4K picture and sound ever.

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Going 4K? If you’re adopting the new 4K video standard, you’re going to need a new downstream controller such as our HDACC II-4K, rated HDMI v2.0a for sources like the 4K Blu-ray players and 4K media streamers like Apple TV 4K, Fire 4K, Roku 4 and NVIDIA Shield for true 4K throughput at the highest resolution. HDMI v2.0 sources do not work when plugged into downstream components with the older HDMI v1.4 or below standard, including 1080p displays. Upgrading to 4K requires changing out your controller so you gain access to HDMI v2.0a.

The 2nd generation HDACC II-4K UHD is an advanced digital control center designed to enable 4 HDMI v2.0a digital sources to be controlled, Essence HDACC II 4K UHD rearswitched, and output to a variety of analog audio components.  With video support up to 6G at 4K x 2K and audio sample rate up-conversion up to 384KHz at 32 bits, this device has an unbeatable feature set not found on any other product on the market today.  

In addition to the HDMI inputs, the HDACC II-4K also includes USB 2.0 input, with Coaxial and Optical Digital inputs and outputs too, it covers every digital source.


So what exactly do all the various resolutions mean sonically?  The lowest resolutions cant be played very loud, their dynamic range is compressed  to save space. This simple chart by Pono Music reveals everything you need to know. The dark orange in the tall bar is Blu-ray, you can play them as loud and clean as the original master recording, with full dynamic range. Thats as good as it gets, a one to one copy of the original is the very definition of the term “high fidelity”, true to the original.  The HDACC II-4K can improve the sound of all the low res sources, adding fullness and detail, but nothing beats the Blu-ray as the gold standard of digital audio sources.

Many Hi Res downloads of classic albums exist now too, store them on your computer for playback anytime. Upsample your CDs or even your vinyl albums to 32/384K to give them new life. The goal of high fidelity is to play back a one to one copy of the original master recording with no loss.  

Note: No USB audio driver required for Mac Computers; USB Audio Driver support for Win 10. We encourage Win 10 adopters to use the HDMI output of their PC, the data rate increases from 500 Mbps (USB) to 10.2 Gbps (HDMI) for hi res sources. The faster the better when it comes to hi def video and hi res audio. 


  • HDMI 2.0a with HDCP 2.2 for uncompressed 4K video
  • THD + N = 0.00001% at -141 dB S/N ratio
  • USB Audio 2.0
  • Optical and Coaxial input / output
  • Analog Input with A to D Conversion
  • Conversion to analog out via XLR Or Headphone Amp
  • USB supports DSD (Direct Stream Digital) on DoP (DSD over PCM) decoding with high sample rate frequency.
  • Includes 4 HDMI v2.0a inputs with one HDMI v2.0a output for switching multiple HDMI v2.0a source devices.
  • Supports Coaxial, Optical, USB and 4 HDMI v2.0a  Digital inputs
  • Supports digital audio signal input and conversion into analog stereo
  • Supports HDMI Audio output can either output the incoming embedded HDMI (Bypass Mode) or insert the selected audio signal (Ext Audio Mode)
  • HDMI video always bypassed to HDMI output to feed 4K display
  • Supports HDMI video resolutions with HDR / Dolby Vision up to 4Kx2K (3840×2160@24/25/30/50/60 and 4096×2160@24/25/30/50/60Hz)
  • Supports Coaxial and Optical input sampling rate up to 384 KHz at 32-bit
  • Coaxial and Optical input support DOP decode to PCM
  • Supports DSD (DoP) Output of SACD music files via USB, Coaxial, or Optical Outputs
  • Supports headphone output volume control
  • Supports Sampling Rate Conversion, all inputs can be SRC to 44.1, 48, 88.2, 96, 176.4, 192 and 384 KHz via DSP engine
  • Supports L/R RCA, XLR and 6.3mm headphone outputs
  • Control by remote control or on-panel master knob
  • HDMI Stereo audio de-embedding of uncompressed Dolby TrueHD or DTS Master HD Soundtracks on Blu-ray, SACD, or DVD-A
  • Headphone output volume control over main control dial or remote control
  • Direct power and mute button on unit
  • High viewing angle OLED display
  • Headphone output fades in after system is muted
  • USB Audio Driver Supports Win 10 Computers; No driver required for Mac computers
  • Analog Output Impedance; Line Out 600 Ohms, XLR Out 300 Ohms
Inputs 4x HDMI [4x Uncompressed AV and Data]
1x Toslink [1x OPTICAL 2 Channel LPCM]
1x RCA [1x COAX 2 Channel LPCM]
1x USB Type B [1x USB (2.0) Audio]
1x 3.5mm Stereo mini-jack [1x Stereo(L/R)]
Outputs 1x HDMI [1x Uncompressed AV and Data]
1x Toslink [1x OPTICAL 2 Channel LPCM]
1x RCA [1x COAX 2 Channel LPCM]
2x RCA [1x Stereo (L/R)]
1x 6.35mm Stereo Jack [1x Headphone]
2x XLR [1x Stereo (Balanced)]
PSU: 5V/3A
Dimensions 8.8″ (223mm) W x 5.7″ (145mm) D x 1.9″ (48mm) H
Net Weight 2 lbs (886g)

HDACC II-4K Owners Manual

Firmware Update: A new firmware update v2.29 has been added to enable Dolby Vision support, you can download from the FTP site.  Enter user name “essence” and password “essence789” to enter.

Additional information

Weight 3 lbs
Dimensions 6 × 8 × 3 in

7 reviews for Essence HDACC II-4K

  1. Rated 5 out of 5

    Sunil Sharma, Vancouver Consumer, July 2018

    The Essence HDACC II-4K is a Giant Killer! Oct 14 update.

    I’ve been using the latest generation II-4k for several months and it’s absolutely fantastic! I have an expensive Audiophile system that reveals even small changes so its really obvious how great this Kit is. The DAC is using the excellent ESS Pro chip and it sounds best set to bypass with no up-sampling. Super Audio and DVD audio will knock your socks off. An absolute bargain in the Audiophile circle where its pretty much unknown. I am planing on buying a second one for my second system. Because of the high dynamic range and ultra low distortion of this DAC you might not realize just how loud your system really is… So beware of potential hearing damage! LoL. My friend measured on his phone app that we were playing songs which peaked at 122.9 db! This DAC has super slam!

    @384 rate more air and acoustic cues of the original recording space. If below good recording the highs are a bit harsh; to compromise dropped to 96k sample rate. Timing on the kick drum is stunning! Difficult not to toe tap as the inner details of low frequency music is reminiscent of when Chris Kelly , my sister’s ex,( local well regarded jazz musician ) would jam with his crew in this very same 16×11 living room. Much deeper bass extension….haven’t bothered turning on the subwoofer.

    Michael & Austin TVA 1 amp with KT 120s, and completely new hand match components in a new Williamson circuit.
    Kozmo passive Preamp with point to point wiring @100k.
    JBL 4430 converted into a JBL 4333, JBL Diaphragm on tweeter, and Radian mid-range diaphragm, custom hand matched JBL 4333 crossover with premium Solen caps & Coils.
    Kuzma stabi / stogi, Denon dl103r with soundsmith Ruby cantilever, Zu Audio aluminum body, Jasmine Preamp, Bob’s musical device Red SUT. ( Will try analog A/D through the Essence DAC at some point). Sunil Sharma, Vancouver Consumer, July 2018

  2. Rated 5 out of 5

    Pat Cook, Consumer July 2018

    “An absolute miracle of audio in a small box. If you have an Apple TV 4k, this is a must have”.

    Pat Cook, Consumer, July 2018

  3. Rated 5 out of 5

    John Gatski, EAN June 2018

    “For $599, the Essence HDDAC II-4K receives a major uptick in audio quality plus HDMI 2.0a compatibility. Its small foot print, connection prowess and the ability to handle most any headphones or drive an amplifier with the upgraded sound extends its reign as the Swiss Army Knife of D/A converters.” John Gatski, EAN Review June 2018

  4. Rated 5 out of 5

    Don Meriwether, Audiophile consumer, Atlanta, GA May 2018

    Used so far as a DAC & Line Stage (in Balanced mode connection to my active Focal Alpha 80 Monitors), I am “gobsmacked” at the sound, particularly the much deeper (lower frequencies) & better-defined Bass – it was like I had added a subwoofer, or changed to tower speakers. Focal rates these monitors to -3 dB at 35 Hz (not too shabby for a two-way with a single ported 8-inch woofer!) Top to bottom frequencies, this is an amazing & gorgeous sounding unit. This also means that I had no problems at all with DAC/USB Driver compatibility with my Win 10 (upgraded from Win 8) laptop. I also love being able to easily switch between my Blu-Ray player & my cablebox/DVR using HDMI inputs. These sound WAY BETTER than using the Optical Toslink connections which I would otherwise have to use. The sonic difference between Optical (from the HDTV’s Digital Sound Output, which I used with the original 2K HDACC), & an HDMI connection which is only available from direct intermediate connection to the cablebox, then output to the HDTV from the HDACC’s HDMI Output is huge! Don Meriwether, Audiophile consumer, Atlanta, GA May 2018

  5. Rated 5 out of 5

    Mike Timm, Audiophile Consumer, April 2018

    Hi Bob
    Thanks for your reply and yes it works fantastic! I have the Audioquest Jitterbug connected to the usb to lightning adapter all plugged into the usb port on the hdacc II-4K, using VOX on my iPhone X, i get full high res audio, not as good as blue ray but hey, better than tidal! Thanks for your quick response. Mike Timm, owner of HDACC II-4K, April 2018

  6. Rated 5 out of 5

    Robert Yull, Oct 2017

    Hi there Bob, so my unit showed up today thank you. Ok so I am running HDMI from Amazon Fire TV to the HDACC then HDMI to TV. Then to get the sound I running cables from HDACC to my pre amp. I also ran a optical cable TV to HDACC. The sound is really good but I have just started to play around a bit. I set it at 385K and it sounds brilliant. Thanks again. Robert Yull, Oct 2017

  7. Rated 5 out of 5

    William Rogers, October 2017

    HDACC II-4K installed, setup took 5 secs, still putting it through it’s sonic paces but am super happy with it. William Rogers, October 2017

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