"Do converters like the offramp or hiface EVO use USB power (I guess not)? If not, can USB power be disengaged when using a SotM USB card."
No, the Off-Ramp and EVO do not use the 5V power. It can be disconnected. You still need the ground wire.
The dual shielded is still interesting because the signal lines are separated from the ground.
I have a common-mode filter that goes even further, as well as severing the 5V wire. Makes a big difference. I hope to productize this soon.
Steve N.
Empirical Audio
No, the Off-Ramp and EVO do not use the 5V power. It can be disconnected. You still need the ground wire.
The dual shielded is still interesting because the signal lines are separated from the ground.
I have a common-mode filter that goes even further, as well as severing the 5V wire. Makes a big difference. I hope to productize this soon.
Steve N.
Empirical Audio