If I understand it correctly cables not used for a while sound worse and require break-in period. DBS field prevents it by keeping molecules organized all the time. Also, polarization of molecules is probably stronger with higher voltage (lower dielectric absorption).
Audioquest explains:
"AudioQuests DBS creates a strong stable electrostatic field which saturates and polarizes (organizes) the
molecules of the insulation. This minimizes both energy storage in the insulation and the multiple nonlinear
time-delays. Sound appears from a surprisingly black background with unexpected detail and dynamic
contrast. The DBS packs batteries will last for years. A test button and LED allow for the occasional battery
check."
Audioquest explains:
"AudioQuests DBS creates a strong stable electrostatic field which saturates and polarizes (organizes) the
molecules of the insulation. This minimizes both energy storage in the insulation and the multiple nonlinear
time-delays. Sound appears from a surprisingly black background with unexpected detail and dynamic
contrast. The DBS packs batteries will last for years. A test button and LED allow for the occasional battery
check."