Up for sale is a matched pair (2 Pcs) of vintage NOS General Electric (GE) 5751 high-mu dual triode audio tubes, packed in white boxes. Manufactured in the USA, these sought-after vintage tubes feature classic black plate construction and a top ring getter design. Highly favored by audiophiles and guitar players as a lower-gain alternative to 12AX7 tubes for dropping noise floor, increasing headroom, and delivering exceptional mid-range warmth and detail.

Both tubes have been tested on an Amplitrex AT1000 automated valve tester at nominal reference settings. Plate Current (Ip) and Transconductance (uMhos) measurements alongside percentage performance ratings relative to standard factory specs are detailed in the table below.