FIIO K19, the flagship desktop DAC and headphone amplifier
Apr 15, 2024 at 11:25 PM Thread Starter Post #1 of 10

FiiO

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K19, the flagship desktop DAC and headphone amplifier, is designed primarily for desktop usage scenarios, catering to consumers who connect wired/wirelessly to computers, digital players, HDMI, smartphones, and other audio sources to drive headphones of various sensitivities.
Relative to the K9 Pro, the upgrades in the K19 are comprehensive, achieving a balance of internal and external improvements:
1. ID Design: The design is more exquisite and slim, allowing both horizontal and vertical placement to meet diverse spatial requirements;
2. Display Screen: A screen is added for convenient viewing of working status and menu settings, enhancing user experience and product grade;
3. New flagship DAC, equipped with dual ES9039SPRO DACs;
4. THX AAA 788+, upgraded to 8 channels, achieving an output power of 8000mW@32Ω;
5. Professional DSP chip, added a professional DSP chip to implement 31-band professional-grade lossless PEQ;
6. HDMI and HDMI ARC decoding, added HDMI and HDMI ARC decoding functionality;
7. Dual AC/DC power supply, supports both AC and DC power supplies (DC power adapter not included as standard);
8. SPDIF out, added SPDIF output;
9. Dual-way 12V TRIGGER, added dual-way 12V TRIGGER functionality.
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Apr 18, 2024 at 2:38 PM Post #4 of 10
Overall I like the look, though, not as classy as the K9 Pro.

I really wished it had WiFi streaming capabilities.
 
Apr 20, 2024 at 4:44 AM Post #6 of 10
@FiiO

What is the limit for the DSP features of the K19 when using very high samplingrate like 384 kHz / 768 kHz PCM or DSD128 / DSD256 - will the PEQ feature still work with such high samplingrate on playback over USB input?
 
Apr 24, 2024 at 8:19 AM Post #8 of 10
@FiiO

What is the limit for the DSP features of the K19 when using very high samplingrate like 384 kHz / 768 kHz PCM or DSD128 / DSD256 - will the PEQ feature still work with such high samplingrate on playback over USB input?
Pure dsd signal can not be equalised using digital domain, it is literally impossible, because it just on or off, 1 bit. It can be converted to pcm and then equalised, but then why would you even have it as dsd if you need to use EQ for it.
 
Apr 24, 2024 at 10:16 AM Post #9 of 10
24-192, I presume.

With this overkill DSD chip? I hardly doubt. RME wrote about ADI-2 DAC FS the DSP is only limited to 24/192 because the used DSP chip is not powerful enough, but FiiO uses such a beast of a DSP chip, there should not this kind of "hardware limitation", but I need a official statement from FiiO and not my assumption from the specs.

Pure dsd signal can not be equalised using digital domain, it is literally impossible, because it just on or off, 1 bit. It can be converted to pcm and then equalised, but then why would you even have it as dsd if you need to use EQ for it.

I don't own any DSD source material and don't want a real DSD direct mode at all.
I'm using HQPlayer for up-sampling my FLAC music collection (mostly Redbook aka 16/44.1 kHz PCM format) like to PCM768 or DSD256 with different filters and modulators for improved SQ.
It would be awesome if the DSP features like the PEQ of the K19 would work in such scenario with this kind of high sample rate source signal.
 

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