I did the following 'simple' upgrades on my CD25:
- upgraded op-amps
- upgraded RCA connectors
- Black Hole 2 dampening throughout the casing
- added IEC connector with upgraded power cord
After everything was done, the sound really smoothed out. I preferred the improved sound of the CD25 when compared side-by-side testing with my brother's AES tube CD player, which cost twice as much.
- upgraded op-amps
- upgraded RCA connectors
- Black Hole 2 dampening throughout the casing
- added IEC connector with upgraded power cord
After everything was done, the sound really smoothed out. I preferred the improved sound of the CD25 when compared side-by-side testing with my brother's AES tube CD player, which cost twice as much.