The RMAA (RightMark Audio Analyzer) Source and Audio Device Measurement Thread [Overview of Measurements in Post #3, Tutorial in Post #2]

Discussion in 'Sound Science' started by hifichris, Mar 1, 2016.
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  1. HiFiChris Contributor
    Workaround that also gets rid of the Mojo's hiss with very sensitive IEMs:


    ... or a different DAC, headphone DAC, Amp or DAC-Amp in the first place...
    hakuzen likes this.
  2. bartzky
    Don't you own a JDS Labs C5D? :)
  3. hakuzen
    yup. precisely that's he one i found after searching :ksc75smile:
    another solution could had been adding an amp to mojo like Chris suggested, but didn't own a decent one (low output impedance, noise and disto, and transparent freq response). recently i got an ibasso P5 falcon amp (during black week) which should be fine for either iems or demanding cans (thinking of getting the best from my he400i). not measured yet.

    edit: low channel imbalance / some kind of digitalised volume control was also desirable (comfort wise). so C5D is a breeze (checked all the points), used as dac+amp or as amp. only cons i find are: output impedance could be even lower, and its power capability (not relevant for measure purposes).
    Last edited: Dec 24, 2017
  4. HiFiChris Contributor
    Hidizs AP200:

    No Load:

    no load #1.jpg



    Triple.Fi 10:


    A generally surprisingly great digital audio player that has fortunately not much in common with the sub-par AP60. Its output impedance is unfortunately clearly too high though.
    Last edited: Jan 12, 2018
    Raketen likes this.
  5. DjBobby
    Thanks a lot for this. As it is somewhat difficult to read 7 overlapping frequency responses, does it mean that except the filter #1, all others are rolled off?
  6. HiFiChris Contributor
    All other filters' frequency responses in the 20 to 20000 Hz range are similar.
    Last edited: May 1, 2018
  7. HiFiChris Contributor
    iBasso DX150 w/ bundled AMP6 module (@ 3.5 mm headphone output & short delay sharp roll-off filter):

    No Load:

    3,5 mm, no load, Filter 3, Standard Sound Style.jpg

    Triple.Fi 10:

    TripleFi 10.jpg
    tarhana, ExpatinJapan and Raketen like this.
  8. bigshot
    Looks audibly identical. What am I supposed to be seeing here?
  9. Raketen
    that it looks audibly identical
    bartzky likes this.
  10. bigshot
    okie doke
  11. castleofargh Contributor
    yup, that the device has low impedance output and no protection caps as it's pretty stable into low impedance load. the having a roller coaster in place of an impedance graph is suggesting as much.
  12. HiFiChris Contributor
    FiiO Q5 w/ Bundled AM3A Module, Single-Ended:

    Line In, Headphone Port Out, No Load:

    Line in HPO.jpg

    USB In, Headphone Port Out, No Load:

    USB DAC HPO_3 (sampling rate in mixer has to be set acordingly).jpg

    Optical In, Headphone Port Out, No Load:


    USB In, Line Out, No Load:

    USB DAC LO_3 (sampling rate in mixer has to be set acordingly).jpg

    Bluetooth In, Headphone Port Out, No Load:

    BT DX150 HPO.jpg

    Bass Boost:

    Bass Boost TOSLINK.jpg

    Triple.Fi 10:

    Line In TF10.jpg

  13. HiFiChris Contributor
    FiiO Q5 w/ AM1 Module:

    No Load:

    AM1 Line In No Load.jpg

    Triple.Fi 10:

    AM1 Line In TF10.jpg
    castleofargh likes this.
  14. HiFiChris Contributor
    I recently bought me a new audio device to rule them all and to call it a day.

    Solely the stuff that interests me personally:

    Output Impedance = Perfection.

    Hiss Performance w/ extremely sensitive IEMs = Perfection as well.

    Volume Control & ability to listen extremely quietly = close to Perfection (already perfection through the I/O menu but somewhat less precise from -96 to -69.5 dB using the main volume knob - so please, pretty, pretty please @RME, implement the same volume scaling (0.5 dB per step over the entire adjustment range) that can be already achieved using the I/O menu detour into the main volume knob and everything a device needs for perfection from my point of view would be there. I know that you want that logarithmic scaling, however you could add an option to the settings that lets the user chose between that logarithmic scaling and the linear 0.5 dB per step scaling over the entire attenuation range. Then the desktop counterpart to my iBasso DX90 that I was always looking for but never fully found would be born).

    That device is:

    RME ADI-2 DAC:

    Fwiw: Default Short Delay/Sharp Digital Filter, Optical Input, EQ of all sorts disabled, no Crosfeed)

    PHONES Output No Load:

    PHONES No Load.jpg

    PHONES Output Triple.Fi 10:

    PHONES TF10.jpg

    IEM Output No Load:

    IEM No Load.jpg

    IEM Output Triple.Fi 10:

    IEM TF10.jpg

    Triple.Fi 10 Comparison both Outputs:

    TF10 both outputs comparison.jpg

    Last edited: May 19, 2018
    bartzky and dc655321 like this.
  15. dc655321
    Lovely indeed.
    That is similar to the conclusion elsewhere as well.
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