Is your 220V at a frequency of 60Hz or 50Hz? If 50Hz, are the converter and the audio components all rated for 50Hz operation?
Also, U.S. ac voltages are typically 120 to 125 volts these days, in much of the country. If you are running them at 110 instead, I would think that could account for the symptoms, particularly with tube equipment where the filament voltages are probably directly proportional to the ac input voltage.
As a first step, I'd suggest trying to measure what your stepped-down ac really is. And then, most likely, trying to find a converter with a higher output.
Re Q2, only if it is explicitly specified to run at 220V!!! And I think that a power conditioner is unlikely to help unless it provides some sort of voltage regulation or regeneration, such as some of the PS Audio units, which cost significant $.
Regards,
-- Al
Also, U.S. ac voltages are typically 120 to 125 volts these days, in much of the country. If you are running them at 110 instead, I would think that could account for the symptoms, particularly with tube equipment where the filament voltages are probably directly proportional to the ac input voltage.
As a first step, I'd suggest trying to measure what your stepped-down ac really is. And then, most likely, trying to find a converter with a higher output.
Re Q2, only if it is explicitly specified to run at 220V!!! And I think that a power conditioner is unlikely to help unless it provides some sort of voltage regulation or regeneration, such as some of the PS Audio units, which cost significant $.
Regards,
-- Al