Want more warmth and definition? This is our Standard Retube Kit for the Orange Dark Terror, the Jim Root Terror and the OR15H Amps. It contains a matched pair of JJ EL84's for power, an ECC81 for the FX loop and three ECC83S's one being current balanced for the phase inverter in V4. A nice upgrade from the stock tubes, sweet and warm! Just let us know in the comments section if you're looking for an early breakup, a moderate breakup or a later breakup for more headroom in which case we will choose the coolest grades we have available for the power tubes.