#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.
![](https://static.wixstatic.com/media/88f4a9_284b7d7b31f14e8197a5be90a8484e71~mv2.jpg/v1/fill/w_147,h_93,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/88f4a9_284b7d7b31f14e8197a5be90a8484e71~mv2.jpg)
![](https://static.wixstatic.com/media/88f4a9_85bf5a7c346d45479253f029021b7982~mv2.jpg/v1/fill/w_147,h_93,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/88f4a9_85bf5a7c346d45479253f029021b7982~mv2.jpg)
![](https://static.wixstatic.com/media/88f4a9_e214ddcf9f1541b697f3aa4d3b983779~mv2.jpg/v1/fill/w_147,h_131,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/88f4a9_e214ddcf9f1541b697f3aa4d3b983779~mv2.jpg)
![](https://static.wixstatic.com/media/88f4a9_284b7d7b31f14e8197a5be90a8484e71~mv2.jpg/v1/fill/w_147,h_93,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/88f4a9_284b7d7b31f14e8197a5be90a8484e71~mv2.jpg)
Specifications(TBD):
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Status: production
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Materials: sandblasted/black anodized aluminum/laser mark/ES9038Q2M/OPA1622/OPA1602
Susumu resistors, Murata C0G caps, AVX tantalum caps, Taiwanese connectors
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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
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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
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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.
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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
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THD+N@1kHz@-2.5dbFS BW 22-22kHz .00018%, SINAD 115db typical 24b/44.1kHz@32ohm
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THD+N@1kHz@-7dbFS BW 22-22kHz .0005% typical for 24b/44.1kHz@16ohm(-6dbfs correspods 120mW)
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Crosstalk: -135db@1kHz no-load, -82db@1kHz 32ohm load
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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.
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Warning: 9038D contains a high-sensitive I/V stage that may cause audible noise when your phone uses LTE 4G, 5g.
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Tech appendix
![](https://static.wixstatic.com/media/88f4a9_32073a4e82be493f993f5e239cc78617~mv2.png/v1/fill/w_49,h_25,al_c,q_85,usm_0.66_1.00_0.01,blur_2,enc_auto/88f4a9_32073a4e82be493f993f5e239cc78617~mv2.png)
![](https://static.wixstatic.com/media/88f4a9_32073a4e82be493f993f5e239cc78617~mv2.png/v1/fill/w_49,h_25,al_c,q_85,usm_0.66_1.00_0.01,blur_2,enc_auto/88f4a9_32073a4e82be493f993f5e239cc78617~mv2.png)
Conventional PC USB2 port, 10Kohm vs 32ohm loads THD+N
![](https://static.wixstatic.com/media/88f4a9_2e60dbae5e25456b9de915c40b78822c~mv2.png/v1/fill/w_49,h_25,al_c,q_85,usm_0.66_1.00_0.01,blur_2,enc_auto/88f4a9_2e60dbae5e25456b9de915c40b78822c~mv2.png)
THD+N or SINAD at -0.3dbfs the data gathered from two samples, about 2.7VRMS no-load
![](https://static.wixstatic.com/media/88f4a9_2e60dbae5e25456b9de915c40b78822c~mv2.png/v1/fill/w_49,h_25,al_c,q_85,usm_0.66_1.00_0.01,blur_2,enc_auto/88f4a9_2e60dbae5e25456b9de915c40b78822c~mv2.png)
THD+N or SINAD at -0.3dbfs the data gathered from two samples, about 2.7VRMS no-load
Conventional PC USB2 port, 10Kohm load THD+N vs time
![THD+N or SINAD at -2dbfs the data gathered from two samples, about 2.2VRMS 32ohm load](https://static.wixstatic.com/media/88f4a9_4d8782a1566f4251b3002070444eff25~mv2.png/v1/fill/w_49,h_25,al_c,q_85,usm_0.66_1.00_0.01,blur_2,enc_auto/88f4a9_4d8782a1566f4251b3002070444eff25~mv2.png)
![THD+N or SINAD at -2dbfs the data gathered from two samples, about 2.2VRMS 32ohm load](https://static.wixstatic.com/media/88f4a9_4d8782a1566f4251b3002070444eff25~mv2.png/v1/fill/w_49,h_25,al_c,q_85,usm_0.66_1.00_0.01,blur_2,enc_auto/88f4a9_4d8782a1566f4251b3002070444eff25~mv2.png)
Conventional PC USB2 port, 32ohm load THD+N vs time
![AES17 DR at -60dbfs the data gathered from two samples](https://static.wixstatic.com/media/88f4a9_b3e64f0c288b426b9b127bd36cf05d46~mv2.png/v1/fill/w_49,h_25,al_c,q_85,usm_0.66_1.00_0.01,blur_2,enc_auto/88f4a9_b3e64f0c288b426b9b127bd36cf05d46~mv2.png)
![AES17 DR at -60dbfs the data gathered from two samples](https://static.wixstatic.com/media/88f4a9_b3e64f0c288b426b9b127bd36cf05d46~mv2.png/v1/fill/w_49,h_25,al_c,q_85,usm_0.66_1.00_0.01,blur_2,enc_auto/88f4a9_b3e64f0c288b426b9b127bd36cf05d46~mv2.png)
Conventional PC USB2 port, AES17 Dynamic Range A-weighted vs time
![Frequency response PCM384 Slow Lin.Phase](https://static.wixstatic.com/media/88f4a9_1102a7ddce4a4e4f89d397e2323b29e3~mv2.png/v1/fill/w_49,h_25,al_c,q_85,usm_0.66_1.00_0.01,blur_2,enc_auto/88f4a9_1102a7ddce4a4e4f89d397e2323b29e3~mv2.png)
![Frequency response PCM384 Slow Lin.Phase](https://static.wixstatic.com/media/88f4a9_1102a7ddce4a4e4f89d397e2323b29e3~mv2.png/v1/fill/w_49,h_25,al_c,q_85,usm_0.66_1.00_0.01,blur_2,enc_auto/88f4a9_1102a7ddce4a4e4f89d397e2323b29e3~mv2.png)
Frequency response PCM384 Slow Lin. Phase filter 10-40000Hz at -0.2db
![Square wave 1kHz PCM384 Slow Lin.Phase.](https://static.wixstatic.com/media/88f4a9_0ca9cce677d94bac9aa7f27fb21488b6~mv2.png/v1/fill/w_80,h_60,al_c,q_85,usm_0.66_1.00_0.01,blur_2,enc_auto/88f4a9_0ca9cce677d94bac9aa7f27fb21488b6~mv2.png)
![Square wave 1kHz PCM384 Slow Lin.Phase.](https://static.wixstatic.com/media/88f4a9_0ca9cce677d94bac9aa7f27fb21488b6~mv2.png/v1/fill/w_80,h_60,al_c,q_85,usm_0.66_1.00_0.01,blur_2,enc_auto/88f4a9_0ca9cce677d94bac9aa7f27fb21488b6~mv2.png)
Nearly ideal square wave 1kHz PCM384 Slow Lin.Phase filter at 200MHz BW scope
![](https://static.wixstatic.com/media/88f4a9_1e66f0472cc94e4ebbbad5c28669964c~mv2.png/v1/fill/w_80,h_60,al_c,q_85,usm_0.66_1.00_0.01,blur_2,enc_auto/88f4a9_1e66f0472cc94e4ebbbad5c28669964c~mv2.png)
![](https://static.wixstatic.com/media/88f4a9_1e66f0472cc94e4ebbbad5c28669964c~mv2.png/v1/fill/w_80,h_60,al_c,q_85,usm_0.66_1.00_0.01,blur_2,enc_auto/88f4a9_1e66f0472cc94e4ebbbad5c28669964c~mv2.png)
Square wave 1kHz PCM192 Slow Lin.Phase filter at 200MHz BW scope
![](https://static.wixstatic.com/media/88f4a9_b4255bfe2f7c4fa5afb4e0d60a7c0afe~mv2.png/v1/fill/w_80,h_60,al_c,q_85,usm_0.66_1.00_0.01,blur_2,enc_auto/88f4a9_b4255bfe2f7c4fa5afb4e0d60a7c0afe~mv2.png)
![](https://static.wixstatic.com/media/88f4a9_b4255bfe2f7c4fa5afb4e0d60a7c0afe~mv2.png/v1/fill/w_80,h_60,al_c,q_85,usm_0.66_1.00_0.01,blur_2,enc_auto/88f4a9_b4255bfe2f7c4fa5afb4e0d60a7c0afe~mv2.png)
Square wave 1kHz PCM96 Slow Lin.Phase filter at 200MHz BW scope
![](https://static.wixstatic.com/media/88f4a9_d26fa489e9f64369b157c4a9faa1aef1~mv2.png/v1/fill/w_80,h_60,al_c,q_85,usm_0.66_1.00_0.01,blur_2,enc_auto/88f4a9_d26fa489e9f64369b157c4a9faa1aef1~mv2.png)
![](https://static.wixstatic.com/media/88f4a9_d26fa489e9f64369b157c4a9faa1aef1~mv2.png/v1/fill/w_80,h_60,al_c,q_85,usm_0.66_1.00_0.01,blur_2,enc_auto/88f4a9_d26fa489e9f64369b157c4a9faa1aef1~mv2.png)
Square wave 1kHz PCM44.1 Slow Lin.Phase filter at 200MHz BW scope
![24/44.1 1kHz -0.5dbfs FFT no load](https://static.wixstatic.com/media/88f4a9_3836d40abb2b478db72f2b816ca5a31d~mv2.png/v1/fill/w_49,h_25,al_c,q_85,usm_0.66_1.00_0.01,blur_2,enc_auto/88f4a9_3836d40abb2b478db72f2b816ca5a31d~mv2.png)
![24/44.1 1kHz -0.5dbfs FFT no load](https://static.wixstatic.com/media/88f4a9_3836d40abb2b478db72f2b816ca5a31d~mv2.png/v1/fill/w_49,h_25,al_c,q_85,usm_0.66_1.00_0.01,blur_2,enc_auto/88f4a9_3836d40abb2b478db72f2b816ca5a31d~mv2.png)
24b/44.1kHz 1kHz -0.5dbfs FFT no load
![24/44.1 1kHz -2dbfs 150mW FFT 32ohm load](https://static.wixstatic.com/media/88f4a9_f41315d6456c43a98cc1e186bde0efe0~mv2.png/v1/fill/w_49,h_25,al_c,q_85,usm_0.66_1.00_0.01,blur_2,enc_auto/88f4a9_f41315d6456c43a98cc1e186bde0efe0~mv2.png)
![24/44.1 1kHz -2dbfs 150mW FFT 32ohm load](https://static.wixstatic.com/media/88f4a9_f41315d6456c43a98cc1e186bde0efe0~mv2.png/v1/fill/w_49,h_25,al_c,q_85,usm_0.66_1.00_0.01,blur_2,enc_auto/88f4a9_f41315d6456c43a98cc1e186bde0efe0~mv2.png)
24b/44.1kHz 1kHz -2dbfs 150mW FFT 32ohm load
![24/44.1 1kHz -2dbfs 150mW FFT 32ohm load](https://static.wixstatic.com/media/88f4a9_0f5b38f6ee6046139bdaa55838592ce5~mv2.png/v1/fill/w_49,h_25,al_c,q_85,usm_0.66_1.00_0.01,blur_2,enc_auto/88f4a9_0f5b38f6ee6046139bdaa55838592ce5~mv2.png)
![24/44.1 1kHz -2dbfs 150mW FFT 32ohm load](https://static.wixstatic.com/media/88f4a9_0f5b38f6ee6046139bdaa55838592ce5~mv2.png/v1/fill/w_49,h_25,al_c,q_85,usm_0.66_1.00_0.01,blur_2,enc_auto/88f4a9_0f5b38f6ee6046139bdaa55838592ce5~mv2.png)
24b/44.1kHz 1kHz -2dbfs 40mW FFT 32ohm load
![24b/48kHz 12kHz -2dbfs FFT no load](https://static.wixstatic.com/media/88f4a9_d7bf932e304a4cd4912c5e5ffb91b045~mv2.png/v1/fill/w_49,h_25,al_c,q_85,usm_0.66_1.00_0.01,blur_2,enc_auto/88f4a9_d7bf932e304a4cd4912c5e5ffb91b045~mv2.png)
![24b/48kHz 12kHz -2dbfs FFT no load](https://static.wixstatic.com/media/88f4a9_d7bf932e304a4cd4912c5e5ffb91b045~mv2.png/v1/fill/w_49,h_25,al_c,q_85,usm_0.66_1.00_0.01,blur_2,enc_auto/88f4a9_d7bf932e304a4cd4912c5e5ffb91b045~mv2.png)
24b/48kHz 12kHz -2dbfs FFT no load