Uploaded February 2026 | Updated September 2026, 2 weeks ago

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Thanks to Custom Cans for sending the DT990 Pro mod for review!

Buy from Custom Cans: customcans.co.uk/shop/product/balanced-beyerdynamic-dt990

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Test Gear...

All music would have been lossless or hi-rez FLAC or DSD files played locally, or in the case of some FLAC, streamed from Qobuz. In all desktop applications files were played through Roon. In DAP situations, files were played from microSD storage.

Chain 1...

FiiO SR11 (youtu.be/YuagbK8p0FA) USB output into Schiit Mimir (youtu.be/JnT_3HpAHt0) or FiiO Warmer R2R DAC (youtu.be/7gL2kCq2KyY) into both Asgard X (youtu.be/n8H8SN3Rdf4) & Jotunheim 3 (youtu.be/GhLNMFzcr74)

Chain 2...

Sonore opticalRendu USB into Berkeley Alpha USB DDC (youtu.be/94AvDeeRjHA); AES into Berkeley Alpha S2 DAC (youtu.be/JY3c4HEyH0s); XLR into LTA Z10e amp (youtu.be/Bft6HUsYDhE)

Compared Headphones...

Beyerdynamic DT880: youtu.be/iDaUsS2rFrk
HiFiMan Ananda Nano: youtu.be/_54bAqcrDQ0
Massdrop + Sennheiser HD6XX: youtu.be/02Um5rMNYS8

Timestamps...

00:00 Intro, Pricing, Disclaimer
01:53 Shameless Self Promotion
02:20 About the Mod
06:45 Sound
14:12 Comparison with Beyerdynamic DT880
17:56 Comparison with Sennheiser HD650/6XX
19:30 Comparison with HiFiMan Ananda Nano
21:32 Wrap Up