Gold Lion ECC83 / 12AX7 / CV4004

These tubes tested extremely low in noise and microphonics across the board, so we do not have any Driver/Buffer Grade.

Platinum grade - The best of the best. Lowest noise and microphony with the tightest triode balance we have available. This is typically 10% or tighter, but may be higher depending on available stock.

Gold grade - Low noise and microphonics with a triode balance typically between 15% and 20%, but may be higher depending on available stock.