USB-C CABLE DONGLE · CONEXANT CX31993
JCALLY JM6PRO 2
A USB-C cable dongle with a Conexant CX31993 DAC chip, a 3.5 mm output and a built-in mic. Weight 7.6 g.

Numbers are the manufacturer's stated figures unless marked as measured; sources linked below.
Outputs and power
Not stated: gain, supply voltage.
The parameter table gives ≈0.2Ω (32Ω); the output impedance panel (product details, image 11) gives <0.2Ω (32Ω), and the comparison table (product details, image 4) ≈0.2Ω. The catalog uses the parameter table.
The AP analyzer charts show SNR 108.458/108.785 dB, noise 5.692/5.455µVrms, THD+N 0.002505/0.002304%, crosstalk −72.804/-72.968 dB and dynamic range 104.376/104.880 dB (Ch1/Ch2); the parameter table gives ≈107 dB, ≈5.7 µV, ≈0.0030%, ≈-71 dB and ≈104 dB. The catalog uses the parameter table.
Is it enough for your headphones?
JCALLY rates the JM6PRO 2 at ≈135 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.
Where to buy
Some shop links are affiliate links: if you buy through one, I may earn a commission. Your price and the order stay the same.
The device
From JCALLY's spec images unless markedHow it stacks up against the competition
Power at 32 Ω · price in US dollars- Nearby
- Same DAC chip
- Most IEMs, 3.2 mW
Devices with the same DAC chip
CX31993 · 13 devices use itCompared with
Manufacturers' stated figures; the price is today's lowestJCALLY JM6 PRO 2 vs JCALLY JM6 PRO
At 32 Ω JCALLY JM6 PRO 2 is listed at ≈70 mW and JCALLY JM6 PRO at 60 mW; the lowest prices are $16.99 and $14.99, $2 apart.
| JCALLY JM6 PRO 2 | JCALLY JM6 PRO | |
|---|---|---|
| Power at 32 Ω | ≈70 mW3.5 mm, socket not printed; the only headphone output | 60 mW3.5 mm, socket not printed; the only headphone output |
| Power at 16 Ω | ≈135 mW3.5 mm, socket not printed; the only headphone output | Not stated |
| Power at 300 Ω | ≈7.4 mW3.5 mm, socket not printed; the only headphone output | Not stated |
| Price today | $16.99Hangout Audio, 7 Nov | $14.99Hangout Audio, 7 Nov |
| DAC chip | Conexant CX31993 | Conexant CX31993 |
| Inputs | USB-C | USB-C |
| Outputs | 3.5 mm | 3.5 mm |
| Size | 110 ± 10 mm | 110 ± 10 mm |
| Weight | 7.6 g | About 6 g |
JCALLY JM6 PRO 2 price history · JCALLY JM6 PRO price history