Report Review for product Vacuum Tube - 12AX7 / ECC83, JJ Electronics

I bought this tube as an experiment to see if the tone of my son's VOX Tonelab LE multi-effects guitar pedal could be improved. The stock tube is the Electro-Harmonix 12AX7 / ECC83, which is a very good tube to begin with, but this new tube gave his guitar more gain and also more clearly defined highs and lows. It has very low noise and breaks up more smoothly when overdriven, with more crunch and less fizz than the Electro-Harmonix. Overall it was a subtle, but discernible difference to a trained ear and well worth the investment, IMHO.