Need all the gain you can get? This is our High Gain Option Retube Kit for the Orange AD140TC. The pre amp section contains four handpicked High Gain ECC83S's with two being current balanced for the phase inverters in V3 and V4. The default power tubes are a matched quad of the JJ Electronic E34L’s but you can configure this kit to use the JJ EL34II's, EL34’s, KT77’s or Big Bottle 6CA7’s by clicking on the "Customize" button.