Although I don’t subscribe to his philosophy, in the words of Gordon Gecko *Wall Street) "Greed is good". 2 more well known, and more applicable quotes are; There’s a sucker born every minute, and A fool and his money are soon parted
That as background: I bought 105 new at least 8 years ago, strictly to play SACDs. My red book player was a Pioneer PD 65 that had Musical Concepts mods, including an outboard power supply. I used it as a transport with various DACs. About 2 years ago, while surfing E-baye I came across a pure silver replacement jumper attached to a Rhodium Furutech IEC that connected to the 105 power supply. It was expensive for what it was, but DAM! I then upgraded the crappy power supply to one on eBay (~$160). Both of these transformed my 105 into a serious red book player, which I really only discovered after my PD 65 finally died. I replaced it with a Marantz HD CD 1, a cd player but with all the newest outputs. I never listened to it as a player, instead connecting it to my Audio Alchemy DDP-1 + PS 5 power supply, and was a very happy camper
One day I decided to listen to it for red book using the variable out volume control. Thanks to the 2 power upgrades, I no longer listen to the Marantz, or use the AA
hth