Want all the gain you can get from your second channel and the lower output of the JJ EL844? This is our Low Output High Gain Option Retube Kit for the VOX AC15H1TV. It contains a matched pair of JJ EL844's for power to drop the overall output a couple decibels, 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.