SKU: 78565801962

E1DA 9038D6K USB Headphone Amp 3.5mm Jack Unbalanced Output DAC+HPA

Sale price$121.50 Regular price$135.00
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Description

E1DA 9038D6K USB Headphone Amp 3.5mm Jack Unbalanced Output DAC+HPANote: Before you buy this product, please read the FAQ carefully. https: e1dashz. wixsite. com index faq Welcome to join our discord channel. https: discord. gg U9Z28KC #9038D6K According to multiple headfiers requests: 3. 5mm jack unbalanced output DAC+HPA 180mW@32ohm in the same case as #9038SG3. The same as 9038SG3, 9038D6K will work with Tweak app. The DAC has virtually zero noise modulation behavior. Specifications: Status: Production Materials:

Note: Before you buy this product, please read the FAQ carefully.

Welcome to join our discord channel.

 

 

#9038D6K

According to multiple headfiers requests: 3.5mm jack unbalanced output DAC+HPA 180mW@32ohm in the same case as #9038SG3. The same as 9038SG3, 9038D6K will work with Tweak app. The DAC has virtually zero noise modulation behavior.

Specifications:

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, 105mA idle current, the device contains >6000uF of capacitance for the power rails filtering
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:  126db(A) typical, referenced to 2.75VRMS

100% units are calibrated with the result printed on the case, >124db(A) is normal grade
Please note, any user with Cosmos APU may calibrate 9038D by themself for particular headphones.
INAD@[email protected] BW 22-22kHz 118-120+db typical for 32b/44.1kHz@no-load
THD@[email protected] BW 22-22kHz <.0001% typical for 24b/44.1kHz@no-load
THD+N@[email protected] BW 22-22kHz .00018%, SINAD 115db typical 24b/44.1kHz@32ohmTHD+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
Warning: 9038D6K contains a high-sensitive I/V stage that may cause audible noise when your phone uses LTE,4G,5G.
 

Tech appendix

Conventional PC USB2 port, 10Kohm vs 32ohm loads THD+N

 

Conventional PC USB2 port, 10Kohm load THD+N vs time

 

Conventional PC USB2 port, 32ohm load THD+N vs time

 

Conventional PC USB2 port, AES17 Dynamic Range A-weighted vs time

 

Frequency response PCM384 Slow Lin. Phase filter 10-40000Hz at -0.2db
 

 

Nearly ideal square wave 1kHz PCM384 Slow Lin.Phase filter at 200MHz BW scope

 

Square wave 1kHz PCM192 Slow Lin.Phase filter at 200MHz BW scope

 

Square wave 1kHz PCM96 Slow Lin.Phase filter at 200MHz BW scope

 

Square wave 1kHz PCM44.1 Slow Lin.Phase filter at 200MHz BW scope

 

24b/44.1kHz 1kHz -0.5dbfs FFT no load

 

24b/44.1kHz 1kHz -2dbfs 150mW FFT 32ohm load

 

24b/44.1kHz 1kHz -2dbfs 40mW FFT 32ohm load

 


24b/48kHz 12kHz -2dbfs FFT no load


 

 

 

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
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  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 78565801962

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Reviewed in the United States on February 10, 2026
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J.K.
Phoenix, US
★★★★★ 5
Wonderful Room Partition !
Color: Black, Size: 88"- 4 Panel
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Reviewed in the United States on September 26, 2025
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Amazon Customer
Lowell, US
★★★★★ 1
Not impressed
Color: Beige, Size: 21.5"- 1 Panel
Very flimsy but does the job intended
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Reviewed in the United States on May 27, 2026
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New York, US
★★★★★ 3
Fair
Color: Black, Size: 88"- 4 Panel
Fair product. Very cheap quality.
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