Big source improvement using CD player

The Oppo 105 streams Tidal. Not the 205

All I know is Tidal demolishes my low-end-of-high-end CD apparatus. Same DAC, same preamp. My question would be, what would it cost you to improve on Tidal/Qobuz sound? Or if the question is functionality, are you running router with Ethernet cable direct to music player, no dongle? Because dongling off remote router gives you glitches. (Not the only cause, but certainly one of them. The better players are designed to accept ONLY Ethernet direct and I gather this is why).

I have a NAD C658.  (Streamer / DAC) combo.  Could I just plug a hard drive full of burned files into the back and expect the same quality sound of a CD player ?  

@jl35 

How do you get the Oppo BD 105 to stream Tidal?

I recommend a Sony SCD 595 sacd/cd changer.Reviewed very highly.Reviewers thought it was better than the 777. I bought mine new for 199.00.Mine is still going strong over ten years.This is a multi channel unit that outputs DSD into my Marantz receiver’s analog inputs with all decoding being done by the Sony.The Marantz lets you play the sacd with no decoding from the receiver.I have played DSOM many times in 5.1 surround which is a real trip.