No, the 02 costs as a 2 channel preamp more than the complete recorder including its improving modification by Busman with it's four mic preamps.
That was my curiosity behind the experiment, that maybe just the recorder is enough for super recordings, but rather no. It's certainly more than enough for all kinds of documentation and 'self-education', but for that one wouldn't need a DR680, a DR-40 would be fully enough.
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