Like this..i found a pair of tubes saying they are grade 1 'but new tested' .what in the heck does that mean? I know nos and nib..but grade 1? Can anyone explain..is it save to buy grade 1 tubes..they are 5998's and i want a pair as backup for the ones i just ordered.. And these are 50 gbp each
About another thing..they is lots talk about whether u need matched pairs as powertubes or not for non balanced tube amps..any thoughts about that? Is it necessay to use matched pairs on a non balanced amp like. My 337 with independent left and right volume knobs?
Edited by hifimanrookie - 12/4/12 at 12:59am