Uploaded July 2026 | Updated September 2026, 2 weeks ago

---

Thanks to Fosi Audio for sending the DS3 & MD3 for review!

Buy from Amazon (affiliate links):

MD3: https://link.amazon/B0eWSSvLR
DS3: https://link.amazon/B04WNVefP

Fosi Product Pages...

DS3: fosiaudio.com/products/fosi-audio-ds3
MD3: fosiaudio.com/products/fosi-audio-md3-magdac-portable-dac-headphone-amplifier-with-rear-display

Want to support the channel? Consider becoming a member! Or you can join my Patreon here:

patreon.com/wavetheory1

Or make a 1-time donation through PayPal here:

paypal.com/donate/?hosted_button_id=7N7Z8WRLWQ36E

Follow me on…

Bluesky: https://bsky.app/profile/wavetheorysound.bsky.social
Instagram: instagram.com/wavetheorysound

Test Gear...

All music was digital in lossless or hi-rez FLAC or DSD formats either played locally or streamed from Qobuz (FLAC only), all through Roon.

For PC gaming testing, a NZXT Player Pro Three was used

Source: iPad 10th Gen (USB-C)

Transducers...

Focal Radiance: youtu.be/rXnmlXCf_bA
HEDD D1: youtu.be/VEMQwuZDVBs
HiFiMan HE1000 Unveiled: youtu.be/pSXKdoYg0Tc
Meze ALBA: youtu.be/NCV51QAJaVQ


Timestamps...

00:00 Intro, Pricing, Disclaimer
01:04 Shameless Self Promotion
01:37 About the Dongles
05:50 Sound
10:13 Comparison to Schiit Vestri
12:28 Wrap Up