Want a little cleaner front end and the earlier breakup of the JJ EL844? This is our Low Output SRV Option Retube Kit for the Orange AD15. It contains a matched pair of JJ EL844's for power (which will drop the overall output a couple decibels), a JJ GZ34 rectifier tube, a 5751 for the input tube and current balanced ECC83S for the phase inverter. Just let us know in the comments section if you're looking for an early breakup, a moderate breakup or a later breakup for more headroom in which case we will choose the coolest grades we have available for the power tubes.