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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.
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:
- Standard Shipping : 3-10 business days
- 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
4.6 ★★★★★
Based on 922 reviews
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Product Reviews
★★★★★ 5
Chuck It Balls!! Best Loved Fetch ball by my Dog!!
Size: Large (Pack of 1), Color: Multi, Size: Large (Pack of 1), Color: Multi
Chuck It large Whistle balls,
Absolutely love these great rubber balls, I think there is at least 20-25 balls all over my house, yard and in my boys toy box.
At least one is trapped until fall on our ravine hill side, they do bounce high and off his snout for more travel time.!! (Over the fence and into ravine)
I subscribe and save getting usually 1 or 2 a month, Really… makes it easy to find one, when they are everywhere!!😜
They are usually blue in color, once in awhile I get an orange one (which I prefer, easier to find in the grass/bushes)
These do have a light whistle sound when throwing and my dog will change direction hearing where they are headed. These balls are very durable and last a very very long time. Actually I don’t think one has worn out.. lost yes….
Definitely get the large size, perfect for a med to large dog to play fetch forever!!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 15, 2025
★★★★★ 5
Love this ball!
Size: Large (Pack of 1), Color: Multi
My doberman and her dog friends love this large high bounce rubber fetch ball! She loves to chew it endlessly between throws and her Rottweiler buddy loves to do the same because it has a hole through it. I definitely recommend the large 3 inch ball for larger dogs.
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Reviewed in the United States on November 15, 2025
★★★★★ 4
The orange ones are perfect!
Size: Medium (Pack of 2), Color: Assorted
I wish I could give 4 1/2 stars but it isn't possible.
The reason why I don't give 5 stars is because no one sells these in a 2 pack of just orange balls. I was able to find blue only but not orange only. I have a pitbull and so does my good friend. We take our dogs out all the time and they absolutely love chasing these balls.... The orange ones to be exact. They will not play with or bring the blue balls back. They are a waste. I had to buy 2 packs to keep the oranges. I'm taking the blue ones to the local dog park and just dropping them off.
Now to the reason these balls deserve 5 stars: They are super easy to throw and they also make a slight whistling noise when you throw them because of the holes. They are real easy to wash due to the material. Also, they are pretty indestructible. The only reason I'm ordering more is due to them being lost. Our dogs have never torn them apart. I'm sure they could if we let them, but we use these for chase, not as chew toys. My friend also tied a rope through one of the balls to throw and retrieve with the rope. He uses this as a fun indoor toy.
These do not float in water but I buy other chuckit balls for that purpose. They have the orange balls with the blue stripe which work great in pools.
The balls are awesome and I keep coming back for more. Hopefully your dogs like the blue balls.
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Reviewed in the United States on December 8, 2015
★★★★★ 5
Worth the money
Size: Medium (Pack of 2), Color: Assorted
I've had several sizes of Chuck-It ball launchers for years but had resisted buying the balls to go with them because I had about 50 tennis balls already that cost only pennies apiece and these were quite a bit more expensive. But, I got tired of the dogs chewing up the tennis balls. I'd start a ball throwing session with a brand new ball and for the first few throws it would sail through the air and the dogs would have to work to retrieve it. However on the way back, their jaws would work it, chomp-chomp-chomp. And when they returned to me, they'd want to stand there and chomp some more, despite my command to "Drop it!" Within 30 minutes, the brand new ball would have a hole in it and then instead of sailing several football fields through the air, then bouncing over a couple of trees, I'd throw it and it would piddle unenthusiastically to the end of the driveway before falling to the ground with a sulky thud, not even bothering to bounce.
So - I finally grew tired of going through a ball every time I play with the dogs - which is everyday - and ordered these chuck-it balls. They are the same size as a tennis ball but made of a rubber-like material (not silicone) and after several months of use, have no wear and tear on them at all. The dogs can exercise their gums on them all the way back to me - throw after throw - and the ball still flies the same distance each time, and bounces satisfyingly upon contact with the ground.
The description says "colors may vary" but the first packet I ordered were blue and orange as pictured. Unfortunately my dog lost the orange one the first time we used it. She got thirsty and ran down to our pond for a drink, dropped the ball in the pond and it hasn't been seen since. It is dense enough it doesn't float as a tennis ball might, and by now is probably so covered in mud and slime that I wouldn't recognize it if I tripped over it. Lesson learned: we don't throw the ball in the pond pasture any more.
After losing the orange ball, I ordered a second packet of the balls so that I would always have a spare. The second packet is also blue and orange. So while colors may vary, in my experience so far, they haven't (which doesn't matter to me or the dogs).
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Reviewed in the United States on March 1, 2015
★★★★★ 5
Super Chewer Friendly!!
Size: Large (Pack of 1), Color: Multi
This ball is perfect for the super Chewer!! It is squishy and durable rubber that stands up to the aggressive chewer. It does not squeak. It has great bounce and is a great toy for fetch. Very cute to watching my pup bring the ball back for another throw. The rubber doesn't stick or have an average powering smell. It smells just like a rubber ball. It is highly functional for a great game of fetch! Highly recommend and very happy with our purchase. It is well worth the price. We will be ordering more.
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Reviewed in the United States on May 20, 2025
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