USB-C DONGLE · CX31993
JCALLY JA31
A USB-C dongle with a CX31993 DAC chip, a 3.5 mm output and a built-in mic. About 4 g.
POWER AT 32 Ω28.2mW3.5 mm, per channel not stated
OUTPUT IMPEDANCENot statedNo data from the manufacturer
SNR117dBtest conditions not stated
PRICENo price yet
OUTPUTS3.5 mm
DAC CHIPCX31993
PARAMETRIC EQNot statedJCALLY lists none
CONTOURNot supported
Numbers are the manufacturer's stated figures unless marked as measured; sources linked below.
Outputs and power
3.5 mm
28.2mWat 32 Ω
Spec image: 28.2 mW at 32 Ω, per channel or both channels not stated
Output impedance -
SNR117 dB
THD+N-95 dB
Crosstalk-53 dB
Not stated: gain, supply voltage.
Is it enough for your headphones?
JCALLY rates the JA31 at 28.2 mW into 32 Ω. Below is how much of that is left to spare for each kind of headphones when you listen loud, with peaks at 110 dB. A figure marked est. is worked out from that rating.
Sensitive IEMsMulti-driver sets that hiss on strong sources
needs 0.6 mWest. 14 mW at 16 Ω+13 dBMost IEMsTypical in-ears, 16 to 50 Ω
needs 3.2 mW28.2 mW at 32 Ω+10 dBEasy-to-drive headphonesClosed and portable, 32 Ω
needs 16 mW28.2 mW at 32 Ω+3 dBHard-to-drive headphones300 Ω, HD 600 class, hungry for voltage
needs 20 mWest. 3 mW at 300 Ω8 dB shortMost planarsPlanar magnetic, low impedance, need current
needs 50 mW28.2 mW at 32 Ω2 dB shortDemanding planarsThe hardest loads, desktop territory
needs 251 mWest. 15 mW at 60 Ω12 dB shortThe device
From JCALLY's spec images unless markedInputUSB-C
FormatsPCM up to 32-bit / 384 kHz
DAC chipCX31993
Works withVerified on Xiaomi 10, Huawei P40 Pro, Samsung S20, Google Pixel 3, iPad Pro and others
MicSupports listening, calls, inline control, live streaming/karaoke, U-shield/K-bao (USB security keys), selfie stick, etc.
BuildShell material aluminium alloy; one-piece all-metal shell
Parametric EQNo data from the manufacturer. Not supported in Contour.
Size15.5 × 10.3 × 11.2 mmThe spec table gives length 15.5 mm (original: 长15.5 mm); the size panel in product details, image 11, and the drawing under the spec table mark 18 mm along the body, the drawing marking 15.5 mm on the stepped side. The catalog uses the spec table value.
WeightAbout 4 g
Devices with the same DAC chip
CX31993 · 13 devices use itMore like this
Sources
Checked 6 Nov 2026wanwang.xin · the spec image
Used for power, noise and distortion, formats, the DAC chip, microphone, size, weight and build