I had an issue with the limited number of input sources for my older design units eg limited to single or only two sets of inputs.
Since my DAC is in-use most of the time, I decided to invest in a Analog-to-Digital (A2D) converter for consolidating the tuner output to the DAC.
That was the easy part ... Had to search hard before purchasing the below as I did not realise how difficult it was to locate such a unit! Most of the market was geared towards Digital to Analogue (D2A) converters. Prices for the available A2D converters were quite shocking as well.
|Analog to Digital converter from PRC|
Operation is simplistic as it operates in single direction only eg A2D not D2A.
Initial testing with the RCA digital output was disappointing - low output volume and the audio quality was mediocre. Changing to TOSLINK, the difference was like night and day! Using a normal TOSLINK cable (about $6 from PRC) and the normal RCA analogue cable provided, my ES tuner sounds as good as the previous direct connection to the amplifier.
Hence I am now able to use the DAC as a source consolidator for the older vintage amplifier units in my collection.