Some things to think about:
1. Your Plinius is a good amp - you might want to consider putting a tube pe amp in front of it. Both BAT or Blue Circle (BC3) would be good choices.
2. I am not familiar with your CD player, but it is also a likely suspect. After all, is it the most direct link to the source of the music. You might want to consider upgrading it or experimenting with an outboard DAC.
3. You did not mention your power cords, speaker cable, or interconnects. If you are using inexpensive models of these it might be time to consider putting some cash into this part of your system. Experimentation with cords and cabling can yield remarkable results.
Don't be too quick to blame your Plinius, it is a worthy piece of equipment, and may just need to be to be a bit "better fed".
1. Your Plinius is a good amp - you might want to consider putting a tube pe amp in front of it. Both BAT or Blue Circle (BC3) would be good choices.
2. I am not familiar with your CD player, but it is also a likely suspect. After all, is it the most direct link to the source of the music. You might want to consider upgrading it or experimenting with an outboard DAC.
3. You did not mention your power cords, speaker cable, or interconnects. If you are using inexpensive models of these it might be time to consider putting some cash into this part of your system. Experimentation with cords and cabling can yield remarkable results.
Don't be too quick to blame your Plinius, it is a worthy piece of equipment, and may just need to be to be a bit "better fed".