Asus Xonar Essence One - Manual (Page 4)

4 ASUS Op-Amp Swap Guide
English
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Xonar Essence ST
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Xonar Xense
1. Serves as I/V (current to voltage convertor) that turns current from DAC into
voltage for output purpose. Changing this will affect the tonal quality for all
outputs (including both RCA and 1/4” Headphone output).
2. Serves as buffer that enhances output signal for speaker. Changing this will
affect the tonal quality of RCA outputs.