#9038D | index

#9038D

According to multiple headfiers requests: 3.5mm jack unbalanced output DAC+HPA 180mW@32ohm in the same case as #9038SG3. The same as 9038SG3, 9038D will work with Tweak app. The DAC has virtually zero noise modulation behavior.

1/7

Specifications(TBD):

Status: production

Materials: sandblasted/black anodized aluminum/laser mark/ES9038Q2M/OPA1622/OPA1602

Susumu resistors, Murata C0G caps, AVX tantalum caps, Taiwanese connectors

Dimensions: 48x22x9mm

Weight: 12g

Power: USB +5V rail no internal battery, 95mA idle current, the device contains >4000uF of capacitance for the power rails filtering

Note: 9038D6K 6000uF 105mA idle current

Input: USB-C, PCM up to 32b/384kHz, DSD256

USB bridge Comtrue CT7601CR custom FW

Output: standard unbalanced output 3.5mm jack, HW volume control .5db/step

Output impedance: .07 Ohm@1000Hz Agilent U1733C

Output power: 180mW@32 Ohm@1kHz@THD=1%

120mW@16 Ohm@1kHz@THD=1%

measured at +.5dbFS level, typical PC USB2 port powered

the hot unit produces less power

Frequency response: 5-80kHz +.05/-1db@ 32b/384kHz

SNR=DR@50MHz_MCLK: 125db(A) typical, referenced to 2.75VRMS

from the second batch 100% units are calibrated with the result printed on the case, >123db(A) is normal grade

Note: 9038D6K 126db(A); units are individually calibrated, see the result printed on the case. >124db(A) is a normal grade. Please note, any user with Cosmos APU may calibrate 9038D by themself for particular headphones.

THD+N@1kHz@-.5dbFS BW 22-22kHz .00014%, SINAD 117db typical for 24b/44.1kHz@no-load

Note: 9038D6K a typical SINAD 118-120db+

THD@1kHz@-.5dbFS BW 22-22kHz <.0001% typical for 24b/44.1kHz@no-load

THD+N@1kHz@-2.5dbFS BW 22-22kHz .00018%, SINAD 115db typical 24b/44.1kHz@32ohm

THD+N@1kHz@-7dbFS BW 22-22kHz .0005% typical for 24b/44.1kHz@16ohm(-6dbfs correspods 120mW)

Crosstalk: -135db@1kHz no-load, -82db@1kHz 32ohm load

The Windows driver is here.

FW tools are here

After ios17 the compatibility Android vs ios was broken, and our DACs flashed for Android need to reflash for ios17_FW if you gonna use ios-devices. The tutorial is here.