Want more warmth and definition? This is our Standard Retube Kit for the VOX AC15HW1. It contains a matched pair of JJ EL84's for power, a JJ EZ81 rectifier tube and three ECC83S's with one being current balanced for the phase inverter in V3. 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.