JCally JM01

DAC Chip: Conexant CX21988 (Single)
PCM 24bit – 96khz, SNR: -95dB, Power: 1 Vrms, USB Type-C Male, 3.5mm SE (Microphone: Yes), 12cm, Aluminum Chassis OFC Cable



  • Neutral sparkly signature, airy timbre, “slender” tonality
  • Intimate mids, neutral sounding vocals, moderate textures
  • Great Treble textures with smooth decay
  • Solid guitar, piano, cello and bass guitar tones, soft edged percussions
  • Bass exhibit acceptable texture definition, so does the Mids
  • Commendable details retrieval, amply nuanced
  • Separation lines are clear, moderate imaging, not as sharp.
  • Great speed handling, able to resolve 250BPM adeptly.
  • For some reasons, JM01 sounds beautiful with Alison Krauss


  • Non-organic timbre deposition, digital-ish
  • Slightly boxed in Soundstage lacking depth
  • Weak output maxed out at 70Ω.
  • Thin sounding dynamics, lacking weight.
  • Mid-Bass exhibited tamed impact and slam.
  • Unlike JA21 which uses the same DAC chip, JM01 can be sibilant.
  • Flat percussions sound, weak vibrancy, and bite
  • Spatial imaging less precise and less holographic


JCally JM01. I will make this one quick. It is a sparkier version of JCally JA21, with better treble extensions and slightly more transparent. A little bit dryer sounding too. Otherwise, they are similar sounding in many ways. Between JM01 and JA21 – the most important lesson I have learnt was that the same DAC chip can sound very different, determined by how they are tuned especially with the Opamp they are paired with.

⭐⭐⭐ ($9.00)

Best Pairing: Natively warm and dynamic BA/DD (70Ω max)

Back to #donglemadness


  1. Jon Mccuan says:

    Sweet blog! I found it while browsing on Yahoo News. Do you have any tips on how to get listed in Yahoo News? I’ve been trying for a while but I never seem to get there! Appreciate it


    1. Andy.EF says:

      Thanks Jon, Sorry I have no idea of how to get listed in Yahoo News


  2. I’m really enjoying the theme/design of your site. Do you ever run into any browser compatibility problems? A couple of my blog visitors have complained about my site not working correctly in Explorer but looks great in Opera. Do you have any tips to help fix this issue?


    1. Andy.EF says:

      Thanks Aileen. Since my site runs on WordPress I guess it has been running fine. Very minimal reports from my audiences that anything goes broken. Running via Chrome always work perfectly


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