Need less headroom and more overall crunch? This is our Low Output High Gain Option Retube Kit for the Orange AD30TC and AD30HTC Amps. It contains a matched quad of JJ EL844's for power (which will drop the overall output a couple decibels), a GZ34 rectifier tube and four handpicked High Gain ECC83S's with two of them being current balanced for the phase inverters.