Their purpose is to drastically reduce hum and buzz caused both by ground currents from power supply filtering and by radiation from supply cables into sensitive signal sources like guitar pickups and microphones. They not only dramatically reduce the noise floor but also noticeably improve dynamic range and sonic clarity. At the heart of all three models is a specially wound and shielded toroidal isolation transformer with a center-tapped secondary. Front outlets are Ground Fault Interrupter protected.
All outlets are balanced.