# GDAC COAX Input so much louder than USB (resolved)

**URL:** <https://forum.psaudio.com/t/gdac-coax-input-so-much-louder-than-usb-resolved/10627>\
**Category:** DACs\
**Created:** [April 28, 2019, 5:40pm UTC](https://forum.psaudio.com/t/gdac-coax-input-so-much-louder-than-usb-resolved/10627 "2019-04-28T17:40:44Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![DrShaw](https://sea1.discourse-cdn.com/flex015/user_avatar/forum.psaudio.com/drshaw/32/14653_2.png) [@DrShaw](https://forum.psaudio.com/u/DrShaw)\
**Post date:** [April 28, 2019, 5:40pm UTC](https://forum.psaudio.com/t/gdac-coax-input-so-much-louder-than-usb-resolved/10627/1 "2019-04-28T17:40:44Z")

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Not sure what I am doing wrong. Listening with headphone output the USB input 8 to my Stellar GDAC sounds great and the volume is just right. Switch to input 6 (CD transport) and the volume is incredibly loud as in blow headphones and speakers loud! No way it seems to turn it down to line level. Thoughts? Yup. I read the manual…

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**Author:** ![dawkinsj](https://avatars.discourse-cdn.com/v4/letter/d/a5b964/32.png) [@dawkinsj](https://forum.psaudio.com/u/dawkinsj)\
**Post date:** [April 28, 2019, 7:34pm UTC](https://forum.psaudio.com/t/gdac-coax-input-so-much-louder-than-usb-resolved/10627/2 "2019-04-28T19:34:04Z")

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The output level of the two devices is apparently different.

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**Author:** ![DrShaw](https://sea1.discourse-cdn.com/flex015/user_avatar/forum.psaudio.com/drshaw/32/14653_2.png) [@DrShaw](https://forum.psaudio.com/u/DrShaw)\
**Post date:** [April 28, 2019, 7:38pm UTC](https://forum.psaudio.com/t/gdac-coax-input-so-much-louder-than-usb-resolved/10627/3 "2019-04-28T19:38:28Z")

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Indeed!

But shouldn’t a COAX output from a CD player be line level? The level was fine with the previous DAC I had in my system.

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**Author:** ![dawkinsj](https://avatars.discourse-cdn.com/v4/letter/d/a5b964/32.png) [@dawkinsj](https://forum.psaudio.com/u/dawkinsj)\
**Post date:** [April 28, 2019, 7:48pm UTC](https://forum.psaudio.com/t/gdac-coax-input-so-much-louder-than-usb-resolved/10627/4 "2019-04-28T19:48:05Z")

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What are the two devices you are inputing into the DGAC? Unless something unusual the CD player should be a standard 2 volts. The USB source however if a streamer or laptop has adjustable volume controls in it’s software. What brands and models are you using.

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<div class="post-metadata">

**Author:** ![DrShaw](https://sea1.discourse-cdn.com/flex015/user_avatar/forum.psaudio.com/drshaw/32/14653_2.png) [@DrShaw](https://forum.psaudio.com/u/DrShaw)\
**Post date:** [April 30, 2019, 8:19pm UTC](https://forum.psaudio.com/t/gdac-coax-input-so-much-louder-than-usb-resolved/10627/5 "2019-04-30T20:19:22Z")

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Issue resolved. I just need to get used to COAX 6 volume level at 15 and JRiver MC 25 USB 8 level at 55. Thanks for comments and views on this. No criticism of PS Audio or the Stellar GDAC was ever meant. Great company; great product and it’s a keeper.