Let's take a look at the incredible OTC Tube Headphone AMP from Cayin, The HA3A. I own this amp and cannot recommend it enough.

You can purchase this AMP through ZMF at this link below:
https://shop.zmfheadphones.com/collec...

More information about this AMP, as well as other Cayin AMPs, can be found here:
https://en.cayin.cn/features/7/59/582...

Gear that I use for testing:

Desktop DAC
Bifrost 2/64

Desktop AMP's
Cayin HA3A
Cayin iHA6
Schiit Magni

Portable Gear
Cayin RU7
iFi Uno

00:00 Introduction
00:57 Build/Design
02:38 5000 Subscriber Goal
02:58 Balanced Driven Explained
05:10 Outputs and Functionality
07:11 Power and Impedance
09:08 Impedance Matching
10:24 Sound Impressions
13:13 Headphone Pairings I Used
17:25 Wrapping Up Thoughts

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Interested in having me review your product?
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