Thank you to APOS for sending me the Ray Tubes (APOS) 6SN7 and 12AU7 Signature tubes for review. You can buy them at the links below, doing so which supports my channel.
As reviewed:
Ray Tubes Select 6SN7
Ray Tubes Select 12AU7
As mentioned:
Ray Tubes Reserve 6SN7
xDuoo TA-30 with Ray Tubes 12AU7
ALO Audio Studio Six headphone amplifier (no longer available).
xDuoo TA-30 DAC/amp review:
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