This is a pristine example of the Audio Research SP=3A-1 Vacuum Tube Preamplifier
Strong Tubes! Recently Bench Serviced by Eugene! It Really is an amazing piece of Audio History, and it still holds it own today!
Must Watch Video Here!!
https://youtu.be/1jVJaM7ZTHg?si=XE1Nh3xd9Cx7dNOt
