The HR from Millennia is an optional add-on for the HV-3B preamp that adds a high-resolution gain switch. The switch increases gain to 1.5dB per step, with a total of 36 steps.
Note! This option is for the HV-3B only, as high-resolution gain is standard on the HV-3C and HV-3D preamps.
HR High-Resolution Gain Switch Option for HV-3B
1-Year Limited Warranty