(!!!) (Best Raytheon Pair #2) CK-5687WB Raytheon black plates NOS 1970's (Audio Note, Manley, Modwright) (36.5/35.0ma and 38.5/35.5ma) 1-3% matched1 low noise pair) CK 5687WB Raytheon black plates NOS 1970's 1 tube) 36. 5 35. 0ma Gm=11,400 10,900 1 tube) 38. 5 35. 5ma Gm=11,700 10. 900 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