RAM Tubes Online Store › 6DJ8 Low Noise (RM-9 only) Image 1 of 1 6DJ8 Low Noise (RM-9 only) $70.00 6DJ8 balanced for your RM-9 MkI and MkII (used in the RM-9 “V1” socket). Quantity: ADD TO CART Added! 6DJ8 balanced for your RM-9 MkI and MkII (used in the RM-9 “V1” socket).