The VHT Special 6 Tube Adapter from 6V6 to EL84 is a great new tube adapter. This special adapter can reconfigure a Special 6 6V6 output tube socket to accept an EL84 output tube. You Special 6 players will enjoy the earlier breakup, distinctive mid-range complexity and legendary top end chime that only an EL84 can provide. The Special 6 EL84 adapter works in other 6V6 amps as well. Check with your local amp tech to be sure your amp voltages don't exceed the maximum ratings for an EL84.