Audio Research Reference 6 Tube Preamplifier, Immaculate Condition,...
Audio Research Reference 6 Tube Preamplifier in Silver Immaculate Condition with Accessories Done 900 hours,....Most Audio Research Products are recommended 400 to 600 hours burn in time! Online User's Manual: chrome-extension://efaidnbmnnnibpcajpcglclefindmkaj/https://audioresearch.com/wp-content/uploads/2019/03/Ref6-Line-Stage-Manual.pdf About Reference 6 by Absolutesounds: chrome-extension://efaidnbmnnnibpcajpcglclefindmkaj/https://www.absolutesounds.com/pdf/main/press/HFN_0516_REF_6_4we