USB-C CABLE DONGLE · ES9318C
JCALLY JM25
A USB-C cable dongle with an ES9318C DAC chip, a 3.5 mm output. About 6 g.
POWER AT 32 Ωest.18mW3.5 mm, worked out from the stated loads
OUTPUT IMPEDANCENot statedNo data from the manufacturer
SNR115dBoutput not stated
PRICENo price yet
OUTPUTS3.5 mm
DAC CHIPES9318C
PARAMETRIC EQNot statedJCALLY lists none
CONTOURNot supported
Numbers are the manufacturer's stated figures unless marked as measured; sources linked below. Est. marks a power worked out between the stated loads.
Outputs and power
3.5 mm
35.15mWat 16 Ω
Spec image: 35.15 mW at 16 Ω, per channel or both channels not stated
1.2mWat 600 Ω
Spec image: 1.2 mW at 600 Ω, per channel or both channels not stated
Output impedance -
SNR115 dB (JCALLY does not say for which output)
Dynamic range115 dB
Distortion-100 dB
Crosstalk-100 dB
Frequency response20 Hz - 20 kHz
Not stated: gain, supply voltage.
Is it enough for your headphones?
JCALLY rates the JM25 at 35.15 mW into 16 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 mW35.15 mW at 16 Ω+17 dBMost IEMsTypical in-ears, 16 to 50 Ω
needs 3.2 mWest. 18 mW at 32 Ω+8 dBEasy-to-drive headphonesClosed and portable, 32 Ω
needs 16 mWest. 18 mW at 32 Ω+0.7 dBHard-to-drive headphones300 Ω, HD 600 class, hungry for voltage
needs 20 mWest. 2.3 mW at 300 Ω9 dB shortMost planarsPlanar magnetic, low impedance, need current
needs 50 mWest. 18 mW at 32 Ω4 dB shortDemanding planarsThe hardest loads, desktop territory
needs 251 mWest. 10 mW at 60 Ω14 dB shortThe device
From JCALLY's spec images unless markedInputUSB-C
FormatsPCM up to 32-bit / 384 kHz, DSD256
DAC chipES9318C
BuildActive 100M crystal oscillator
Parametric EQNo data from the manufacturer. Not supported in Contour.
Length110 ± 10 mm
WeightAbout 6 g
The printed body label in the photos reads 'ES9318' and 'SA9312L'; the spec table and text say ES9318C. The catalog uses the spec table value ES9318C.