I think your problem is that you are using the analogue outs. The SBT is a heck of a value, but at it's price point it can't be expected to do everything well. I suspect using it the spiff will sound much better and eliminate the click. I wouldn't waste what sounds like limited funds on a new power supply.
Dacs are really cheap now, and many CD players and pre amps or AVRs have decent digital ins. On the second hand market you can probably get
Something suitable. There are some great headphone amps that have Dacs and have digital ins and outs for under $200.
Dacs are really cheap now, and many CD players and pre amps or AVRs have decent digital ins. On the second hand market you can probably get
Something suitable. There are some great headphone amps that have Dacs and have digital ins and outs for under $200.