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 Vintage VOX AC30 Top Boost and 90's era AC30 Reissue amps. It contains a matched quad of JJ EL844's for power to drop the overall output a couple decibels, a GZ34 rectifier tube, one Gold Pin ECC82 along with five Gold Pin ECC83S's one of them being current balanced for the phase inverter in V6.