The ???$ Hidizs S9 Pro Red Copper Limited Edition is a very powerful, linear, and good sounding portable headphone DAC & amp that features single-ended and balanced circuits. It is technically and sonically identical to the S9 Pro however heavier. The differences are strictly cosmetic.
This note is based on my review of the original Hidzs S9 Pro at www.audioreviews.org
This Copper Edition is limited to 500 units.
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