Is the sweet spot for your VOX just a little to loud for you? This is our Low Output Standard Retube Kit for the VOX AC15H1TV. It contains a matched pair of JJ EL844's for power to drop the overall output a couple decibels, a JJ EZ81 rectifier tube, an EF806 for V1 and three ECC83S's with one being current balanced for the phase inverter in V4.