(!!!) (Best Raytheon Pair #1) CK-5687WB Raytheon black plates NOS 1970's (Audio Note, Manley, Modwright) (35.0/34.6ma and 34.5/35.0ma) 1-2% matched1 low noise pair) CK 5687WB Raytheon black plates NOS 1970's 1 tube) 35. 0 34. 6ma Gm=12,200 12,000 1 tube) 34. 5 35. 0ma Gm=12,100 12,200 Matched on Amplitrex Good NOS Ma range 30 35ma 7119 and 6900 is best sub for a 5687 and visa versa RECOMMENDED FOR: Modwright preamp Audio Note DAC 4 Audio Note Jinro amp Audio Note L3 Audio Note M3 preamp Manley Ray Samuels Raptor and B52 Aria VW5XL Modwright Sony DVP999ES Audion 845 Black Shadow Bottlehed Smack