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Screen : 4.3"TFT, (no touchscreen) CPU : C4V, same as C4. DAC : CS4398, same as C4. Amp : same as...

Colorfly CK4

  • Screen : 4.3"TFT, (no touchscreen)
    CPU : C4V, same as C4.
    DAC : CS4398, same as C4.
    Amp : same as C4, or downgraded version C4-R.
    Opamp : ADA4075-2, but possibility for difference on a lower priced version.
    Misc : 24/192 support (now only wav with bug), dedicated 3,5" Line Out and Headphone Out, TF Card (MicroSD) support, physical buttons (On/Off, Volume +/-, Hold switch), 8Gb (16GB?) storage.
    There is a doubt on Jitter reduction capability. The CK4 was initially presented as sporting the same jitter reduction as the C4 (less than 5ps), but the 8Gb model on sale at Taobao is listing a jitter reduction of less than 100ps. This could be the indication of the lower model, with C4-R downgraded amp.
    Filetype support : Audio - WAV, FLAC, APE, MP3, MP2, WMA, OGG, AAC.
    Release date : February 27th in China, available on Taobao from March 2nd
    Date unknown for export.
    Intro price : 8Gb model is sold for 800RMB (120$US) on Taobao as of March 2nd

Recent Reviews

  1. rhannebohn
    Best sound for less Money
    Written by rhannebohn
    Published Mar 16, 2016
    Pros - great Sound
    Cons - no manual
    I got this Player (Used) for only $ 50,-. I´ve searched for it before a long time.
    Now i´m really happy.
    But: the better the earphones, the more happy you´ll be...
    Normally I have to spent much more money for such great sound!
    1. airomjosh
      i have a modded CK4. i tried to upgrade and bought shozy alien and xduoo x3, i ended up selling both. still using it for the last 6 years. try to mod the ck4 and you will be happier
      airomjosh, Mar 16, 2016
  2. burnwaygta4
    Qualitative modification of the player
    Written by burnwaygta4
    Published Sep 1, 2013
    I made a modification of the player that lifts the sound to TOP portable players. Details here(http://www.head-fi.org/t/564517/colorfly-ck4-first-review/225#post_9762627)
  3. bitlisz
    The Real Portable HiFi
    Written by bitlisz
    Published May 2, 2011
    Pros - Sound quality, line out, used material (metal frame), 24bit/192kHz support
    Cons - Bugs in the software, only wav supports high resolution, no cue support
    The sound quality is very good from the line out.
    I think one of the best sounding DAP here, but for sure in the top 5!
    The sound is balanced/neutral and detailed, the music background is really black (! later).

    I can feel real atmosphere, the instruments are in right positions, not "in the face".

    The bass goes to deep enough without any eq, and dynamic too. (with IEM: Audio-Technica ATH-CKM55)


    The headphone out can drive low imp headphones, but I can feel the bass rolloff on 56Ohm, and the volume is not enough at all. (with: SUPERLUX HD668B)

    I feel sometimes that the sound maybe a bit weak (not energetic).


    With Headstage Arrow 12HE (3G) the sound perfect (!)


    The real drawbacks:

    - some clicking noise during high resolution playback

      like static discharge or playback of vinyl rip

      nearly every 10 sec is at least one...and it seems on higher resolution worse)

      maybe firmware bug?

      I translated with google the C4 firmware release log, and found this: "revised WAV format compatibility issues"

    - only wav supported for high resolution playback (>48kHz/16bit) ->

      hard to fit in the 8GB+uSD (I have 8GB uSD in my phone, but thinking on 16/32GB too)

      There is a need for Flac too. -> 32GB uSD is works for me.

    - no cover art during playback

    - the big screen is without touch technology (i dont care)

    - user interface, I mean really simple, and the keys at the top with strange order, but I can still use it, and can learn after a while. At least it is responsive and works fine

    - the Line Out can be changed by Volume control

    - maybe the battery life only average (but at least >8hours)

    - somebody cannot use the EQ funtion


    Tested: mp3/flac(44.1/16 48/16 44.1/24 48/24 88.2/24 96/24 192/24)/wav (same)

    Not tested: wma/ogg/ape..., video playback (I don't really care about this)


    I already tried to contact with the Chinese support for firmware update.

    They told they are working on that and expected in 2011 may.

    1. View previous replies...
    2. alphaman
      "the Line Out can be changed by Volume control"
      Do you mean fully variable? If so, what's the diff. between it and HO?
      alphaman, Aug 23, 2011
    3. bitlisz
      Yes, fully variable, but it is recommended to use on full output. It is big dufference on different impedance earphones in volume, because cannot drive. In terms of sound quality it seems the Line out more clear, crisp, detailed.
      I get this answer from Colorfly (on 31.03.2011):
      - the Line Out can be changed by Volume control (should be fixed)
      Re: Yes, when changed volume the Line out output will be controled.
      So,If you want to use the Line Out,you must set maximum volume,This was the best.
      Line Out is a direct output for LPF circuit of DAC ,this can not be fixed."
      bitlisz, Aug 23, 2011
    4. alphaman
      After much experimentation, I found LO at MAX vol. not best. One or two steps below max leads to subtle but noteworthy improvements, IMO! See more about this in the CK4 thread.
      alphaman, Jun 8, 2013


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