Audio Research CLASSIC 30

In very good condition rare to find Classic 30. Only one owner has not played so much and has been stored for the last 12 years.
Plugged it for listening , sound is astonish, pure silent and very solid, lot of bass. Audition is possible, no box, pickup preferred.
Have extra tubes to give with but I don’t know if they are good, the one inside sounds fantastik.