I use a Promitheus Reference C-Core TVC. Compared it with a 4k active preamp and sent the preamp back. I know what you mean.
It is ABSOLUTELY necessary to have "enough" gain in your system for the TVC to work. Also it is very important to choose a loudspeaker with high sensitivity to make the TVC work it's magic in the system. I do not care for impedance or other stuff while using TVC. But "gain" and "sensitivity" are the key words here.
It is ABSOLUTELY necessary to have "enough" gain in your system for the TVC to work. Also it is very important to choose a loudspeaker with high sensitivity to make the TVC work it's magic in the system. I do not care for impedance or other stuff while using TVC. But "gain" and "sensitivity" are the key words here.