Want a very smooth and rich tone with less grit and the earlier breakup of the JJ EL844's? This is our Low Output Gold Pin Option Retube Kit for the VOX AC30HH Heads and AC30H2 Combo Amps. It contains a matched quad of JJ EL844's for power to drop the overall output a couple decibels, a JJ GZ34 rectifier tube, a Gold Pin EF806 for V1 along with three Gold Pin ECC83S's one being current balanced for the phase inverter in V4.