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RE: Yes. Really....

The graph shows me that the ARC preamp output impedance is probably high and incapable of driving lower impedance loads w/o severe roll-off.

The balanced output Z is 500 ohms. What fool would ever attempt to drive a 600 ohm amp? Contrary to your lack of awareness, matching gear is all about impedance. Hence multiple values tested - 600 and 100k ohms with vastly different results. What amps on the market today use 600 ohms?

ARC looks rolled off in the bass region of your graph

There is no *me* to this. I reference John Atkinson's measurements. Flat to 20 hz is *rolled off* to exactly what? Huh?

First column is 10 hz. Down about a tenth.





Edits: 12/25/24

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