Lifting the 'Earth Ground' from power cables is common especially with source components. I would only do so if there is a problem like a humm (ground loop). That is the only way I would say it will sound better.
Of course like Riley804 means never disconnect earth ground from your house. Also never add a second earth ground to your homes electrical system unless you tie the 2 together
Of course like Riley804 means never disconnect earth ground from your house. Also never add a second earth ground to your homes electrical system unless you tie the 2 together