# Koss Porta Pro-Unofficial Thread

**URL:** <https://forum.headphones.com/t/koss-porta-pro-unofficial-thread/4694>\
**Category:** Official Headphone Model Discussion\
**Tags:** portapro\
**Created:** [January 5, 2020, 12:49am UTC](https://forum.headphones.com/t/koss-porta-pro-unofficial-thread/4694 "2020-01-05T00:49:27Z")\
**Posts on this page:** 1\
**Showing post:** 217

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**Author:** ![ValentineLuke](https://sea2.discourse-cdn.com/flex016/user_avatar/forum.headphones.com/valentineluke/32/9729_2.png) [@ValentineLuke](https://forum.headphones.com/u/ValentineLuke)\
**Post date:** [February 6, 2020, 1:53am UTC](https://forum.headphones.com/t/koss-porta-pro-unofficial-thread/4694/217 "2020-02-06T01:53:24Z")

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I just finished a little “write up/review” of the DFC. It’s nearly as much of a Porta Pro review as it is for the DFC.

For anyone interested.

> [@AudioQuest Dragonfly Cobalt USB DAC/AMP - Official Thread](https://forum.headphones.com/t/audioquest-dragonfly-cobalt-usb-dac-amp-official-thread/3413/98):
>
> Audioquest Dragonfly Cobalt ‘Lightning in a Dongle’… The Audioquest Dragonfly Cobalt is the third entrant in Audioquest’s series of Dragonfly USB DAC + Headphone Amps and is situated as their flagship DAC preceded by the Dragonfly Red, and Dragonfly Black. Under the hood… It employs the ESS Sabre ES9038Q2M chipset (32 bit- natively decoding 24 bit/96khz, including an MQA core decoder) in conjunction with the ESS Sabre 9601 headphone amplifier with a high-level output of 2.1V @ 10k …

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