Preamp Tubes

Groove Tubes SAG-AT7-MPI Matched Phase Inverter Tube Changing Kit

Groove Tubes Gold Series GT-12AX7-R Preamp Tube

Groove Tubes SAG-AX7-MPI Matched Phase Inverter Tube Changing Kit

Groove Tubes Gold Series GT-12AX7-C Preamp Tube

Groove Tubes SAG-MHG Marshall High Gain Preamp Tube Changing Kit

Tung-Sol 12AX7 Tube

Groove Tubes Gold Series GT-6201-M Preamp Tube

Groove Tubes SAG-FHG Fender High Gain Preamp Tube Changing Kit

Groove Tubes SAG-FST Fender Soft Touch Preamp Tube Changing Kit

Groove Tubes Gold Series GT-12AT7 Preamp Tube

Fender GT12AT7 Tube

Fender GT12AX7A Tube

Fender 12AX7A 7025 Single Tube

Mullard 12AX7 Preamp Tube

Sovtek 12AX7WC 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-12AU7 Preamp Tube

Fender 12AT7 Single Amp Tube