Preamp Tubes

Tung-Sol 12AX7 Tube

EVH ECC83/12AX7 Preamp Tubes

Ruby Ruby 12AX7AC5 Preamp Vacuum Tube

Mullard 12AT7 Preamp Tube

Ruby ECC83 (12AX7A) Ruby Tube Preamp Tube

Groove Tubes GT-12AY7 Select Preamp Tube

MESA/Boogie 12AX7 Preamp Tube

Mullard 12AX7 Preamp Tube

Sovtek 12AX7WA Preamp Tube

Electro-Harmonix 12AX7EH Preamp Tube

Groove Tubes Gold Series GT-ECC83-S Preamp Tube

Groove Tubes Gold Series GT-12AT7 Preamp Tube