Uploaded November 2025 | Updated September 2026, 2 weeks ago

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Thanks to HEDD for sending the D1 for review!

D1 webpage: https://hedd.audio/products/heddphone-d1

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Berkeley Alpha S2: youtu.be/JY3c4HEyH0s
Chord Hugo 2: youtu.be/uuSOYjFtcvY
Chord 2Go + 2Yu: youtu.be/S3O7JNOJIqI
FiiO SR11: youtu.be/YuagbK8p0FA
Flux Mentor: youtu.be/SG2c-1b7o9I
HEDD Heddphone: head-fi.org/showcase/hedd-audio-heddphone.24445/reviews#review-26326
HEDD HEDDPhone Two: youtu.be/dr-Dp_JskzQ
HEDD HEDDPhone Two GT: youtu.be/UW2Jpc6FA4U
iBasso DX180: youtu.be/WcwIwukvYmc
Lampizator Baltic 3: youtu.be/QShvh2rqETc
Massdrop + Sennheiser HD6XX: youtu.be/02Um5rMNYS8
MIRPH Mirph-1: youtu.be/b7AvyocYck4
Schiit Asgard X: youtu.be/n8H8SN3Rdf4
Schiit Mimir: youtu.be/JnT_3HpAHt0
Sonore ultraRendu: youtu.be/qEOOE9rP6Rs
Violectric HPA V281: youtu.be/ETFZtNxunKg

Timestamps...

00:00 Intro, Pricing, Disclaimer
02:08 Shameless Self Promotion
02:36 Use Timestamps & Takeaways
05:09 About the D1
08:40 Build, Fit, Comfort
13:53 Test Gear
18:18 Sound
29:49 Comparison with Mirph-1
33:24 Comparison with Senn HD650/6XX
43:56 Final Thoughts