solderdude
Grand Contributor
Thank you for your advice, I always appreciate alternative and intruguing ideas like this, but there is something I don't understand, maybe I'm missing somthing: on the linked service manual (i already had this from a long time since I'm always curious about how my gear is implemented) RCA pre outs are rated at 10 Ohm, not 4.7, that is low but not as musch as I desire. Unless you refer to tape rec-out, for witch I can't guess impedence but that is obviously not regulated via volpot..
The schematic clearly shows 4.7 Ohm on the pre-out. Maybe the specs are incorrect or the schematic is incorrect. The schematic clearly shows 4.7 Ohm. Only with certain IEM's this could be a potentially too high value.
Tape out is > 470 Ohm.
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