# USB-\>ProUSB vs USB-\>DDC -\>COAX

**URL:** <https://forum.msbtechnology.com/t/usb-prousb-vs-usb-ddc-coax/1143>\
**Category:** General\
**Created:** [March 18, 2026, 6:13pm UTC](https://forum.msbtechnology.com/t/usb-prousb-vs-usb-ddc-coax/1143 "2026-03-18T18:13:20Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![idrachman](https://yyz1.discourse-cdn.com/flex003/user_avatar/forum.msbtechnology.com/idrachman/32/199_2.png) [@idrachman](https://forum.msbtechnology.com/u/idrachman)\
**Post date:** [March 18, 2026, 6:13pm UTC](https://forum.msbtechnology.com/t/usb-prousb-vs-usb-ddc-coax/1143/1 "2026-03-18T18:13:20Z")

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If I hardly ever play DSD, is there a sonic benefit to go from a streamer’s USB to a DDC (such as a Singxer SU-2 or better) into COAX of my Premier vs what I use currently which is the ProUSB/ISL modules. I would think the ProUSB/ISL is the best method for using a USB output from a source without introducing the DD.

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**Author:** ![Jonathan\_Gullman](https://yyz1.discourse-cdn.com/flex003/user_avatar/forum.msbtechnology.com/jonathan_gullman/32/682_2.png) [@Jonathan\_Gullman](https://forum.msbtechnology.com/u/Jonathan_Gullman)\
**Post date:** [March 19, 2026, 1:07am UTC](https://forum.msbtechnology.com/t/usb-prousb-vs-usb-ddc-coax/1143/2 "2026-03-19T01:07:14Z")

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I would stay using the ProUSB. All that external box is trying to do is what the ProUSB does, just with less isolation.

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**Author:** ![idrachman](https://yyz1.discourse-cdn.com/flex003/user_avatar/forum.msbtechnology.com/idrachman/32/199_2.png) [@idrachman](https://forum.msbtechnology.com/u/idrachman)\
**Post date:** [March 19, 2026, 11:10am UTC](https://forum.msbtechnology.com/t/usb-prousb-vs-usb-ddc-coax/1143/3 "2026-03-19T11:10:30Z")

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Thanks Jonathan for your reply.