Preamp Tubes

Mullard 12AT7 Preamp Tube

MESA/Boogie SPAX7 Preamp Tube

Tung-Sol 12AX7 Tube

Mullard 12AX7 Preamp Tube

Sovtek 12AX7WA Preamp Tube

Electro-Harmonix 12AX7EH Preamp Tube

Ruby ECC83 (12AX7A) Ruby Tube Preamp Tube

VHT Tube Tester

MESA/Boogie 12AX7 Preamp Tube