Uploaded February 2026 | Updated September 2026, 2 weeks ago

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Thanks to Aoshida Audio for sending the AO300 Pro for review!

Buy from Aoshida Audio (affiliate link): aoshida-audio.com/products/smsl-ao300-pro?DIST=RUZHHw%3D%3D

*use code WaveTheory-AO300PRO for 5% discount at Aoshida!

Buy from Aoshida via Amazon (affiliate link): amzn.to/4qj4ssL

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Test Gear...

All music started as digital files in lossless or hi-rez FLAC format or DSD played locally. FLAC files were either played locally or streamed from Qobuz. All files played through Roon.

Sources...

FiiO SR11 streamer: youtu.be/YuagbK8p0FA
Toslink from NZXT gaming PC (Windows 11)
Singxer SU-6 DDC: youtu.be/6dr4T0Sd_NU

Speakers...

MartinLogan Motion B10: youtu.be/D47YKAGN8iw
Monoprice 12 in 150-watt powered subwoofer

Headphones...

HiFiMan HE1000 Unveiled: youtu.be/pSXKdoYg0Tc
Massdrop + Sennheiser HD6XX: youtu.be/02Um5rMNYS8
SJY Horizon Closed Carbon: youtu.be/8UOM3K_VLDc

Timestamps...

00:00 Intro, Pricing, Disclaimer
01:40 Shameless Self Promotion
02:07 About the AO300 Pro
06:58 Front Panel
08:27 Back Panel
09:57 Remote, UI, Bass Management?
15:13 USB Implementation Issues
20:09 Sound
26:56 Compare it to what?
31:00 Final Thoughts