Some Class D amps natully have very low input impedance, the input buffers are there to make them look more like other amps and give OEMs a chance to differentiate themselves. Check the resulting input impedance before deciding
Bypass the op-amp input buffer - only Audiophonics?
Lots of good Class D amplifiers offer selection of two or three gain levels, which I understand are achieved in the op-amp input buffer in front of the Class D module proper. But I see Audiophonics amplifiers that also offer the choice to bypass the op-amp buffer. This is attractive if your DAC puts out good voltage and your speakers are run at medium or low volume.
Does any other manufacturer of completely assembled Class D amplifiers offer this bypass option?
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