In Reply to: Yamaha AX-570 line stage posted by rws on January 9, 2015 at 16:59:29:
Good news: the amp is pretty sensitive at 1V for rated output. That puts into into passive territory since many sources have greater output than that.
Bad news: its input impedance is very low at 10k ohms which is neither passive nor tube friendly. You need a very low output impedance of the source or preamp.
You will likely need to experiment to find a good match.
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