JJ EL84 .
The JJ EL84 is a combination of remarkably smooth mids, twinkling highs and a rock solid bottom end make the JJ a tough tube to beat. Most EL84's are used in combo amps and are especially prone to mechanical vibration. Again the JJ Tesla EL84 tubes seems to dominate the field in it's ability to withstand the abuse combo's dish out.
In a VOX AC30 the JJ tubes will still deliver the VOX chime while standing up to the heat and mechanical vibration due to the close proximity to the speakers.
Great for VOX AC30, VOX AC10, Fender Blues Junior, Fender Pro Junior and Mesa Boogies. The JJ Tesla EL84 tube.