wschofield
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I am running 6N1P and 6P15P-EV and I have a pair of EL84 I have run a little. Need more time with the amp to say what the difference between the output tubes are. I also built the speakers fallowing generally recommended plan from their creator although I use a port of 3 inches plus a 2.5mH inductor and 8 ohm resistor in parallel to reduce the HF and bring up the base. As you can see from the picture the internal pictures if I did it over I would go with a larger case as things got tight in there. Also failed to measure twice before drilling and my transformers are on the wrong side of the board, thankfully the wires where just long enough. I also found that the 100 ohm resistor from the heaters to ground reduced the hum to almost nothing. In fact the input transformer itself is louder then the drivers. Next up is a better TT and phono-pre amp.
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