Want all the gain you can get from your second channel? This is our High Gain Option Retube Kit for the VOX AC15H1TV. It contains a matched pair of JJ EL84's for power, a JJ EZ81 rectifier tube, an EF806 for V1 and three handpicked High Gain ECC83S's with one being current balanced for the phase inverter in V4. 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.