Why you need Teflon tube sockets : They’re expensive and may seem like an extravagance but our beloved tubes are sensitive to vibrations and vibration is everywhere. Chassis born vibration softens the imaging and veils harmonics, robbing the music of its tonal tapestry. Teflon sockets act as a vibration break for the chassis’ shakes and a damper for airborne vibes. It also grips the tube pins MUCH better than ceramic sockets and has a more favorable dielectric characteristic so high notes can soar! This is not a small improvement and I’d put it on the same level as a major cap upgrade, maybe even higher than that.