Dumb Question

[duffrouillard]

Im trying to buy new tubes for my rm100 head so i have spares but i dont know what duet or hard duet or quartet means help me out

 

[JKD]

duet = 2 tubes
quartet = 4 tubes

You need a matched quartet for an RM100 or 2 matched duets

'Hard' refers to the rating...a hard tube will have parameters that mean it will break up/distort later (I think.)

 

[Julia]

Technically according to the Randall biasing video you don't even need matched.