I have heard an improvement in performance of CDP with analog volume control, when the analog output passes through the SCE Harmonic Recovery System box on its way to the amplifier inputs.
This is not a preamp, but an optimizer of signal transfer, which actually is rather impressive, and reasonably priced, especially when purchased used on Audiogon.
For those who want to use a CDP without its own analog volume control, I have been using the EVS Ultimate Attenuators, which plug directly into the amplifier input jacks, providing stepped volume control.
Using both of these devices in the signal path from CDP to amplifier can provide great sound in a single source system.
This is not a preamp, but an optimizer of signal transfer, which actually is rather impressive, and reasonably priced, especially when purchased used on Audiogon.
For those who want to use a CDP without its own analog volume control, I have been using the EVS Ultimate Attenuators, which plug directly into the amplifier input jacks, providing stepped volume control.
Using both of these devices in the signal path from CDP to amplifier can provide great sound in a single source system.