The ODA's relay circuit would be a welcome addition however. So would a triple gain or variable gain switch, clearly marked to simplify adjustments based on source (i.e. 2V position would be 2V source, and so on).
How about bass and treble adjustments? Would that be wrong?
Should accept, at minimum, 3.5mm input, RCA, USB, and a digital in.
Also, I'd like to see it do a solid power upgrade - 1-2 watt max.
I'd pay about $100-$200.