Want the earlier breakup of the JJ EL844's and all the gain you can get? This is our Low Output High Gain Option Retube Kit for the 90's era VOX AC15 Reissue. It contains a matched pair of JJ EL844's for power to drop the overall output a couple decibels, a JJ 5Y3S rectifier tube, a standard ECC83S for V4 along with four handpicked High Gain ECC83S's one being current balanced for the phase inverter in V5.