I owned the first or second prototype of the EA-230 around 22 yrs ago or so; a very good sounding little amp.
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I have a pair of them wired as 60W monoblocks. I think they're great, but then again, I own a TF-12 preamp as well, and another couple Berning amps too, so I guess I'm biased. The 6JN6 output tubes are cheap and plentiful, and the amp(s) take quite kindly to 6SN7 rolling. I replaced the bias pots on mine (I had a dead spot), installed new input and output connections, and updated the power supply caps (same Sprague series and value, just 13 years newer). Grab one if you can, and if you don't like it, you can always sell since they seem to be increasing in value, and there is a demand for them. Good listening.