The xDuoo TA-20 Plus tube headphone amplfier offers some unique and special features, including a tube rectifier, VU meter, and hybrid output. With a lot of power output and the ability to roll tubes, is this the affordable tube amp you've been looking for? Purchase link (supports channel): https://apos.audio/products/xduoo-ta-20-plus-tube-amp?sca_ref=1915795.HszCmmyneH APOS Ray Tubes: https://apos.audio/products/xduoo-ta-20-plus-tube-amp?sca_ref=1915795.HszCmmyneH Other products shown: Topping A30/D30 Ensemble Kit - https://apos.audio/products/xduoo-ta-20-plus-tube-amp?sca_ref=1915795.HszCmmyneH FiiO FT-3 Headphone - https://apos.audio/products/xduoo-ta-20-plus-tube-amp?sca_ref=1915795.HszCmmyneH FiiO K11 DAC/Amp - https://apos.audio/products/xduoo-ta-20-plus-tube-amp?sca_ref=1915795.HszCmmyneH Hifiman Arya Organic - https://apos.audio/products/xduoo-ta-20-plus-tube-amp?sca_ref=1915795.HszCmmyneH Join us on Discord: https://discord.gg/cHX6wpq2tQ Follow us on Twitter! https://twitter.com/GadgetryTechJoe Follow us on Instagram! https://www.instagram.com/gadgetrytech/ Follow us on Facebook! https://www.facebook.com/GadgetryTech Support links (no special benefits/gatekeeping, added this per viewer requests!): Patreon Support: https://www.patreon.com/GadgetryTech PayPal Donate: https://bit.ly/3IEuymW Want us to review something? Contact us! Joe@GadgetryTech.com