totally newbie here and pickup the PLB-AS8 just to do A,B,C compare between amps, dac, preamp, etc. is there away to do this cheaply ?
It's an analog stereo 8x8 matrix preamp with level control using a proprietary control protocol on an obsolete data link design from 1990. Presuming the audio components have not deteriorated in the last 30 years, still NO.
Stop while you still can.
ok thank you