Does sound goes through the same path for 4.4mm connector and for balanced RCA? Just want to clarify, does the sound goes through some addition preamplifier for 4.4mm balanced output gaining additional distortions?
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Hi
The comparison table and Audio architecture are following below.
| Attribute | Output Stage IC | Max Output Voltage | Volume Adjustment | Min THD+N | Apply equipment | |
|---|---|---|---|---|---|---|
| RCA | Line out(LO) | OPA1612 | 4.0Vrms | DAC(Pre-AMP) | -118dB @ noload | Active Speaker/Power Amp |
| 4.4 Headphone | Power output(PO) | RT6863 | 5.0Vrms | Analog volume | -116dB @ noload -110dB @ 33Ω |
Headphone |
Both them can drive high impedance headphone,such as 600Ω. But for low impedance headphone, RCA cannot provide enough current,thus the analog signal must be severe distortion.
The volume adjustment of 4.4 headphone has the little distortions then RCA,as to the analog volume from NJU72315.
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