Add to Cart Quick view Blues Jr. / Pro Jr. JJ Tube Upgrade Kit (2x EL84, 3x 12AX7) JJ / Tesla MSRP: Now: $139.90 Was: Premium Tube Set for Guitar Amplifiers Upgrade your guitar amplifier with the T-12AX7-S-JJ and T-EL84-JJ-MP (Apex Matched) tube set. This high-quality set includes: Two T-EL84-JJ tubes for... MSRP: Now: $139.90 Was: Add to Cart Quick view Qty in Cart: 0 Quantity: Decrease Quantity: Increase Quantity: Price: MSRP: Now: $139.90 Was: Subtotal: Add to Cart